/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:46:42,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:46:42,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:46:42,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:46:42,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:46:42,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:46:42,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:46:43,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:46:43,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:46:43,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:46:43,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:46:43,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:46:43,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:46:43,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:46:43,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:46:43,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:46:43,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:46:43,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:46:43,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:46:43,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:46:43,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:46:43,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:46:43,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:46:43,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:46:43,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:46:43,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:46:43,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:46:43,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:46:43,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:46:43,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:46:43,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:46:43,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:46:43,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:46:43,074 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:46:43,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:46:43,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:46:43,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:46:43,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:46:43,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:46:43,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:46:43,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:46:43,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:46:43,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:46:43,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:46:43,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:46:43,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:46:43,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:46:43,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:46:43,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:46:43,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:46:43,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:46:43,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:46:43,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:46:43,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:46:43,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:46:43,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:43,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:46:43,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:46:43,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:46:43,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:46:43,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:46:43,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:46:43,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:46:43,385 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:46:43,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-21 15:46:43,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860c51b83/18266bae5cfb400f8af647a67033954d/FLAGf05989869 [2020-07-21 15:46:43,908 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:46:43,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-21 15:46:43,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860c51b83/18266bae5cfb400f8af647a67033954d/FLAGf05989869 [2020-07-21 15:46:44,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860c51b83/18266bae5cfb400f8af647a67033954d [2020-07-21 15:46:44,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:46:44,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:46:44,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:46:44,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:46:44,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:46:44,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cee54b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44, skipping insertion in model container [2020-07-21 15:46:44,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:46:44,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:46:44,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:46:44,556 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:46:44,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:46:44,581 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:46:44,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44 WrapperNode [2020-07-21 15:46:44,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:46:44,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:46:44,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:46:44,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:46:44,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (1/1) ... [2020-07-21 15:46:44,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:46:44,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:46:44,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:46:44,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:46:44,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (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 [2020-07-21 15:46:44,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:46:44,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:46:44,751 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 15:46:44,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:46:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:46:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:46:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 15:46:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:46:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:46:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:46:44,929 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:46:44,929 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:46:44,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:46:44 BoogieIcfgContainer [2020-07-21 15:46:44,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:46:44,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:46:44,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:46:44,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:46:44,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:46:44" (1/3) ... [2020-07-21 15:46:44,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f225c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:46:44, skipping insertion in model container [2020-07-21 15:46:44,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:46:44" (2/3) ... [2020-07-21 15:46:44,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f225c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:46:44, skipping insertion in model container [2020-07-21 15:46:44,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:46:44" (3/3) ... [2020-07-21 15:46:44,942 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2020-07-21 15:46:44,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:46:44,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:46:44,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:46:44,992 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:46:44,992 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:46:44,992 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:46:44,992 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:46:44,993 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:46:44,993 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:46:44,993 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:46:44,993 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:46:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 15:46:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:46:45,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:45,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:45,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:45,018 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 15:46:45,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:45,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745698752] [2020-07-21 15:46:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:45,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:46:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:46:45,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:46:45,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745698752] [2020-07-21 15:46:45,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:46:45,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:46:45,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117487897] [2020-07-21 15:46:45,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:46:45,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:46:45,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:46:45,226 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 15:46:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:45,346 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 15:46:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:46:45,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:46:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:45,360 INFO L225 Difference]: With dead ends: 35 [2020-07-21 15:46:45,360 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 15:46:45,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:46:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 15:46:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 15:46:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:46:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:46:45,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 15:46:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:45,410 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:46:45,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:46:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:46:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:46:45,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:45,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:45,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:45,628 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 15:46:45,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:45,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456855632] [2020-07-21 15:46:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:45,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:45,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:46:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:46:45,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:46:45,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456855632] [2020-07-21 15:46:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:46:45,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:46:45,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629870123] [2020-07-21 15:46:45,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:46:45,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:46:45,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:46:45,717 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 15:46:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:45,795 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 15:46:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:46:45,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:46:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:45,798 INFO L225 Difference]: With dead ends: 27 [2020-07-21 15:46:45,799 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 15:46:45,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:46:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 15:46:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 15:46:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:46:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:46:45,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 15:46:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:45,808 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:46:45,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:46:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:46:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:46:45,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:45,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:46,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:46,014 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 15:46:46,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:46,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235034492] [2020-07-21 15:46:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:46,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:46:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:46:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:46,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:46:46,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235034492] [2020-07-21 15:46:46,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:46,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:46:46,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280789606] [2020-07-21 15:46:46,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:46:46,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:46:46,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:46:46,325 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 15:46:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:46,424 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 15:46:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:46:46,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 15:46:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:46,427 INFO L225 Difference]: With dead ends: 32 [2020-07-21 15:46:46,427 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:46:46,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:46:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:46:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 15:46:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:46:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:46:46,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 15:46:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:46,437 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:46:46,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:46:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:46:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:46:46,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:46,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:46,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:46,653 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 15:46:46,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:46,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216679197] [2020-07-21 15:46:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:46,685 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:46,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:46:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:46:46,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:46,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:46:46,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216679197] [2020-07-21 15:46:46,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:46,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:46:46,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273059707] [2020-07-21 15:46:46,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:46:46,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:46:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:46:46,939 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 15:46:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:47,028 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 15:46:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:46:47,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 15:46:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:47,031 INFO L225 Difference]: With dead ends: 37 [2020-07-21 15:46:47,031 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:46:47,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:46:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:46:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 15:46:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:46:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:46:47,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 15:46:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:47,041 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:46:47,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:46:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:46:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:46:47,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:47,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:47,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:47,257 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 15:46:47,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:47,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294342785] [2020-07-21 15:46:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:47,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:46:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:46:47,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:47,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:46:47,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294342785] [2020-07-21 15:46:47,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:47,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:46:47,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995277186] [2020-07-21 15:46:47,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:46:47,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:46:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:46:47,702 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 15:46:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:47,856 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 15:46:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:46:47,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 15:46:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:47,858 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:46:47,858 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 15:46:47,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:46:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 15:46:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 15:46:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:46:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:46:47,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 15:46:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:47,869 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:46:47,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:46:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:46:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:46:47,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:47,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,086 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 15:46:48,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:48,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056399957] [2020-07-21 15:46:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:48,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:46:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 15:46:48,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:48,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:48,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:48,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:46:48,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056399957] [2020-07-21 15:46:48,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:48,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:46:48,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48921830] [2020-07-21 15:46:48,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:46:48,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:46:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:46:48,497 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 15:46:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:48,637 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 15:46:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:46:48,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 15:46:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:48,642 INFO L225 Difference]: With dead ends: 47 [2020-07-21 15:46:48,644 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 15:46:48,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:46:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 15:46:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 15:46:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:46:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:46:48,671 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 15:46:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:48,672 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:46:48,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:46:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:46:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 15:46:48,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:48,680 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:48,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,895 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 15:46:48,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:48,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467645536] [2020-07-21 15:46:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:48,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:46:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 15:46:49,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:49,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 15:46:49,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467645536] [2020-07-21 15:46:49,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:49,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:46:49,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478095129] [2020-07-21 15:46:49,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:46:49,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:46:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:46:49,557 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 15:46:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:49,732 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 15:46:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:46:49,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 15:46:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:49,735 INFO L225 Difference]: With dead ends: 52 [2020-07-21 15:46:49,735 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 15:46:49,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:46:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 15:46:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 15:46:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 15:46:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 15:46:49,766 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 15:46:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:49,766 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 15:46:49,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:46:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 15:46:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 15:46:49,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:49,769 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:49,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:49,989 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 15:46:49,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:49,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118432044] [2020-07-21 15:46:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:50,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:46:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 15:46:50,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:50,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:50,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:50,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:51,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:51,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:51,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-21 15:46:51,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118432044] [2020-07-21 15:46:51,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:51,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-21 15:46:51,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949294230] [2020-07-21 15:46:51,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:46:51,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:46:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:46:51,362 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 21 states. [2020-07-21 15:46:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:51,895 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-07-21 15:46:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:46:51,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-07-21 15:46:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:51,898 INFO L225 Difference]: With dead ends: 94 [2020-07-21 15:46:51,899 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:46:51,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:46:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:46:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 15:46:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:46:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-21 15:46:51,911 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 96 [2020-07-21 15:46:51,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:51,911 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-21 15:46:51,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:46:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-21 15:46:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:46:51,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:51,914 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:52,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:52,127 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2020-07-21 15:46:52,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:52,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788509550] [2020-07-21 15:46:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:52,178 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:52,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:46:52,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 15:46:52,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:52,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:52,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:52,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 15:46:52,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788509550] [2020-07-21 15:46:52,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:52,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:46:52,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577584233] [2020-07-21 15:46:52,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:46:52,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:46:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:46:52,727 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 13 states. [2020-07-21 15:46:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:52,849 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-21 15:46:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:46:52,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-21 15:46:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:52,852 INFO L225 Difference]: With dead ends: 65 [2020-07-21 15:46:52,852 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 15:46:52,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:46:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 15:46:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 15:46:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:46:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 15:46:52,863 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 68 [2020-07-21 15:46:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:52,864 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 15:46:52,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:46:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 15:46:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 15:46:52,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:52,866 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:53,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:53,081 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-21 15:46:53,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:53,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346628651] [2020-07-21 15:46:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:53,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:53,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:46:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 15:46:53,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:53,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:53,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:53,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:54,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:54,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 15:46:54,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346628651] [2020-07-21 15:46:54,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:54,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 15:46:54,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34989327] [2020-07-21 15:46:54,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:46:54,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:46:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:46:54,121 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-21 15:46:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:54,279 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-21 15:46:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:46:54,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-21 15:46:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:54,281 INFO L225 Difference]: With dead ends: 68 [2020-07-21 15:46:54,282 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:46:54,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:46:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:46:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 15:46:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 15:46:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 15:46:54,306 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-21 15:46:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:54,307 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 15:46:54,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:46:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 15:46:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 15:46:54,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:54,315 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:54,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:54,530 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 6 times [2020-07-21 15:46:54,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:54,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949126943] [2020-07-21 15:46:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:54,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:46:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-21 15:46:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:55,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:56,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:57,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:57,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:57,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-21 15:46:57,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949126943] [2020-07-21 15:46:57,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:57,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:46:57,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301341266] [2020-07-21 15:46:57,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:46:57,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:46:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:46:57,163 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 25 states. [2020-07-21 15:46:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:57,932 INFO L93 Difference]: Finished difference Result 144 states and 221 transitions. [2020-07-21 15:46:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 15:46:57,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-07-21 15:46:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:57,936 INFO L225 Difference]: With dead ends: 144 [2020-07-21 15:46:57,936 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 15:46:57,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 391 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:46:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 15:46:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-21 15:46:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 15:46:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-07-21 15:46:57,949 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 218 [2020-07-21 15:46:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:57,950 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-07-21 15:46:57,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:46:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-07-21 15:46:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 15:46:57,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:57,953 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:58,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:58,167 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 7 times [2020-07-21 15:46:58,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:58,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900819332] [2020-07-21 15:46:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:58,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:46:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-21 15:46:58,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:59,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-21 15:46:59,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900819332] [2020-07-21 15:46:59,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:59,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 15:46:59,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146052129] [2020-07-21 15:46:59,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:46:59,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:59,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:46:59,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:46:59,844 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 17 states. [2020-07-21 15:47:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:00,062 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-21 15:47:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:47:00,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-07-21 15:47:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:00,066 INFO L225 Difference]: With dead ends: 85 [2020-07-21 15:47:00,066 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 15:47:00,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:47:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 15:47:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-21 15:47:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 15:47:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-21 15:47:00,077 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 177 [2020-07-21 15:47:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:00,078 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-21 15:47:00,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:47:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-21 15:47:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 15:47:00,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:00,083 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:00,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:00,298 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:00,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-07-21 15:47:00,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:00,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278765300] [2020-07-21 15:47:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:00,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:47:00,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:47:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-21 15:47:00,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:02,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:02,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:03,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-21 15:47:03,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278765300] [2020-07-21 15:47:03,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:03,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 15:47:03,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180233475] [2020-07-21 15:47:03,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:47:03,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:47:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:47:03,130 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 19 states. [2020-07-21 15:47:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:03,408 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2020-07-21 15:47:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:47:03,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 286 [2020-07-21 15:47:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:03,411 INFO L225 Difference]: With dead ends: 90 [2020-07-21 15:47:03,411 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 15:47:03,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:47:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 15:47:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 15:47:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 15:47:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-21 15:47:03,430 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 286 [2020-07-21 15:47:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:03,433 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-21 15:47:03,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:47:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-21 15:47:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 15:47:03,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:03,447 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 59, 36, 36, 36, 36, 36, 36, 36, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:03,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:03,662 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash -350328107, now seen corresponding path program 9 times [2020-07-21 15:47:03,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:03,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197567258] [2020-07-21 15:47:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:03,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:03,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:47:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 7742 proven. 1596 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2020-07-21 15:47:04,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:07,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:07,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:08,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:08,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1220 proven. 3406 refuted. 0 times theorem prover too weak. 10117 trivial. 0 not checked. [2020-07-21 15:47:09,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197567258] [2020-07-21 15:47:09,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:09,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 15:47:09,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073794732] [2020-07-21 15:47:09,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:47:09,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:47:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:47:09,508 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 29 states. [2020-07-21 15:47:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:10,761 INFO L93 Difference]: Finished difference Result 187 states and 314 transitions. [2020-07-21 15:47:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:47:10,764 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 504 [2020-07-21 15:47:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:10,766 INFO L225 Difference]: With dead ends: 187 [2020-07-21 15:47:10,767 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 15:47:10,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 955 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 15:47:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 15:47:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-07-21 15:47:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 15:47:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2020-07-21 15:47:10,778 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 504 [2020-07-21 15:47:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:10,779 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2020-07-21 15:47:10,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:47:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2020-07-21 15:47:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 15:47:10,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:10,783 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:10,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:10,998 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 10 times [2020-07-21 15:47:10,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:10,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629276068] [2020-07-21 15:47:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:11,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:47:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:47:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 15:47:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:13,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:13,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:14,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:14,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:14,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:14,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 15:47:15,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629276068] [2020-07-21 15:47:15,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:15,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 15:47:15,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141262391] [2020-07-21 15:47:15,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:47:15,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:15,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:47:15,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:47:15,463 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand 21 states. [2020-07-21 15:47:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:15,809 INFO L93 Difference]: Finished difference Result 107 states and 153 transitions. [2020-07-21 15:47:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:47:15,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2020-07-21 15:47:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:15,813 INFO L225 Difference]: With dead ends: 107 [2020-07-21 15:47:15,813 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 15:47:15,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:47:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 15:47:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 15:47:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 15:47:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2020-07-21 15:47:15,823 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 463 [2020-07-21 15:47:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:15,824 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2020-07-21 15:47:15,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:47:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2020-07-21 15:47:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2020-07-21 15:47:15,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:15,836 INFO L422 BasicCegarLoop]: trace histogram [145, 145, 117, 72, 72, 72, 72, 72, 72, 72, 45, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:16,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:16,050 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash -928557949, now seen corresponding path program 11 times [2020-07-21 15:47:16,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:16,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752608583] [2020-07-21 15:47:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:16,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:16,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 15:47:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 29376 proven. 4650 refuted. 0 times theorem prover too weak. 24744 trivial. 0 not checked. [2020-07-21 15:47:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:23,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:23,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:23,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:24,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:26,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 2815 proven. 9221 refuted. 0 times theorem prover too weak. 46734 trivial. 0 not checked. [2020-07-21 15:47:27,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752608583] [2020-07-21 15:47:27,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:27,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33] total 37 [2020-07-21 15:47:27,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815333657] [2020-07-21 15:47:27,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 15:47:27,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 15:47:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:47:27,982 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand 37 states. [2020-07-21 15:47:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:29,885 INFO L93 Difference]: Finished difference Result 257 states and 498 transitions. [2020-07-21 15:47:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 15:47:29,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 994 [2020-07-21 15:47:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:29,891 INFO L225 Difference]: With dead ends: 257 [2020-07-21 15:47:29,891 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 15:47:29,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2023 GetRequests, 1923 SyntacticMatches, 29 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1231, Invalid=4025, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 15:47:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 15:47:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-07-21 15:47:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 15:47:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2020-07-21 15:47:29,906 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 994 [2020-07-21 15:47:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:29,907 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2020-07-21 15:47:29,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 15:47:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2020-07-21 15:47:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 15:47:29,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:29,914 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:30,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:30,130 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash -127293739, now seen corresponding path program 12 times [2020-07-21 15:47:30,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:30,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803690129] [2020-07-21 15:47:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:30,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:47:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:30,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 15:47:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4380 refuted. 0 times theorem prover too weak. 28057 trivial. 0 not checked. [2020-07-21 15:47:30,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:34,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:35,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:36,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:36,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:36,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:36,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:36,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:37,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:37,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:37,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4480 refuted. 0 times theorem prover too weak. 27957 trivial. 0 not checked. [2020-07-21 15:47:37,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803690129] [2020-07-21 15:47:37,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:47:37,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 15:47:37,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103134444] [2020-07-21 15:47:37,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:47:37,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:47:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:47:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:47:37,541 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand 23 states. [2020-07-21 15:47:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:47:37,833 INFO L93 Difference]: Finished difference Result 136 states and 198 transitions. [2020-07-21 15:47:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:47:37,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 749 [2020-07-21 15:47:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:47:37,838 INFO L225 Difference]: With dead ends: 136 [2020-07-21 15:47:37,838 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 15:47:37,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1458 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 15:47:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 15:47:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-07-21 15:47:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 15:47:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 194 transitions. [2020-07-21 15:47:37,849 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 194 transitions. Word has length 749 [2020-07-21 15:47:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:47:37,851 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 194 transitions. [2020-07-21 15:47:37,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:47:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 194 transitions. [2020-07-21 15:47:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2098 [2020-07-21 15:47:37,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:47:37,889 INFO L422 BasicCegarLoop]: trace histogram [307, 307, 248, 153, 153, 153, 153, 153, 153, 153, 95, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:47:38,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:38,102 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:47:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:47:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1575583038, now seen corresponding path program 13 times [2020-07-21 15:47:38,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:47:38,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72139550] [2020-07-21 15:47:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:47:38,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:47:38,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:47:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-21 15:47:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:47:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 265024 backedges. 11579 proven. 25169 refuted. 0 times theorem prover too weak. 228276 trivial. 0 not checked. [2020-07-21 15:47:40,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:47:51,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:54,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:57,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:57,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:47:59,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:01,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:02,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:03,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:04,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:05,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:09,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:09,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:10,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:10,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:11,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:12,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:13,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:13,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 265024 backedges. 11579 proven. 25491 refuted. 0 times theorem prover too weak. 227954 trivial. 0 not checked. [2020-07-21 15:48:14,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72139550] [2020-07-21 15:48:14,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:14,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47] total 51 [2020-07-21 15:48:14,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183101735] [2020-07-21 15:48:14,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 15:48:14,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 15:48:14,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 15:48:14,822 INFO L87 Difference]: Start difference. First operand 132 states and 194 transitions. Second operand 51 states. [2020-07-21 15:48:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:21,166 INFO L93 Difference]: Finished difference Result 415 states and 1048 transitions. [2020-07-21 15:48:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 15:48:21,167 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 2097 [2020-07-21 15:48:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:21,175 INFO L225 Difference]: With dead ends: 415 [2020-07-21 15:48:21,175 INFO L226 Difference]: Without dead ends: 289 [2020-07-21 15:48:21,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4251 GetRequests, 4101 SyntacticMatches, 43 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2775, Invalid=8997, Unknown=0, NotChecked=0, Total=11772 [2020-07-21 15:48:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-07-21 15:48:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2020-07-21 15:48:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 15:48:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 372 transitions. [2020-07-21 15:48:21,220 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 372 transitions. Word has length 2097 [2020-07-21 15:48:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:21,221 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 372 transitions. [2020-07-21 15:48:21,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 15:48:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 372 transitions. [2020-07-21 15:48:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 15:48:21,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:21,235 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:21,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:21,451 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 14 times [2020-07-21 15:48:21,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:21,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941810253] [2020-07-21 15:48:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:22,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:22,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:48:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8218 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2020-07-21 15:48:22,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:29,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:31,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:31,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:33,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:33,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:34,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:34,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:34,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8344 refuted. 0 times theorem prover too weak. 78261 trivial. 0 not checked. [2020-07-21 15:48:36,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941810253] [2020-07-21 15:48:36,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:36,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 15:48:36,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838616790] [2020-07-21 15:48:36,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:48:36,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:48:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:48:36,226 INFO L87 Difference]: Start difference. First operand 218 states and 372 transitions. Second operand 25 states. [2020-07-21 15:48:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:36,669 INFO L93 Difference]: Finished difference Result 222 states and 375 transitions. [2020-07-21 15:48:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 15:48:36,670 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1212 [2020-07-21 15:48:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:36,675 INFO L225 Difference]: With dead ends: 222 [2020-07-21 15:48:36,676 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 15:48:36,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2380 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:48:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 15:48:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-07-21 15:48:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 15:48:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 371 transitions. [2020-07-21 15:48:36,695 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 371 transitions. Word has length 1212 [2020-07-21 15:48:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:36,696 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 371 transitions. [2020-07-21 15:48:36,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:48:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 371 transitions. [2020-07-21 15:48:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1962 [2020-07-21 15:48:36,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:36,733 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 232, 143, 143, 143, 143, 143, 143, 143, 89, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:36,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:36,946 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1868832152, now seen corresponding path program 15 times [2020-07-21 15:48:36,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:36,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790449688] [2020-07-21 15:48:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:38,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 15:48:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15097 refuted. 0 times theorem prover too weak. 214468 trivial. 0 not checked. [2020-07-21 15:48:39,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:50,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:54,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:57,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:59,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:02,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:02,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15252 refuted. 0 times theorem prover too weak. 214313 trivial. 0 not checked. [2020-07-21 15:49:03,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790449688] [2020-07-21 15:49:03,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:03,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 15:49:03,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564737826] [2020-07-21 15:49:03,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:49:03,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:49:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:49:03,560 INFO L87 Difference]: Start difference. First operand 218 states and 371 transitions. Second operand 27 states. [2020-07-21 15:49:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:04,078 INFO L93 Difference]: Finished difference Result 225 states and 390 transitions. [2020-07-21 15:49:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:49:04,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1961 [2020-07-21 15:49:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:04,086 INFO L225 Difference]: With dead ends: 225 [2020-07-21 15:49:04,086 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:04,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3874 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 15:49:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 384 transitions. [2020-07-21 15:49:04,104 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 384 transitions. Word has length 1961 [2020-07-21 15:49:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:04,106 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 384 transitions. [2020-07-21 15:49:04,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:49:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 384 transitions. [2020-07-21 15:49:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3923 [2020-07-21 15:49:04,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:04,224 INFO L422 BasicCegarLoop]: trace histogram [575, 575, 465, 287, 287, 287, 287, 287, 287, 287, 178, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:04,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:04,433 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1437984220, now seen corresponding path program 16 times [2020-07-21 15:49:04,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:04,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725259956] [2020-07-21 15:49:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:05,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:05,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 5847 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-21 15:49:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 22882 proven. 47998 refuted. 0 times theorem prover too weak. 861264 trivial. 0 not checked. [2020-07-21 15:49:12,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:20,176 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:49:20,372 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:49:32,942 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:49:33,045 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:49:34,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:44,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:44,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:46,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:48,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:48,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:50,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:50,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:50,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:50,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:50,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:52,332 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:49:55,598 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:49:55,701 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:49:55,813 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:49:55,924 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:49:56,031 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:50:05,746 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:50:06,697 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:50:06,824 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:50:06,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:50:07,056 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:50:07,166 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:50:08,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:15,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:20,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:20,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:23,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:23,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:25,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:26,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:26,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:26,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:27,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:27,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:27,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:27,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:27,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 22882 proven. 48308 refuted. 0 times theorem prover too weak. 860954 trivial. 0 not checked. [2020-07-21 15:50:33,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725259956] [2020-07-21 15:50:33,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:50:33,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47] total 49 [2020-07-21 15:50:33,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154697416] [2020-07-21 15:50:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-21 15:50:33,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:50:33,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-21 15:50:33,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2020-07-21 15:50:33,371 INFO L87 Difference]: Start difference. First operand 221 states and 384 transitions. Second operand 49 states. [2020-07-21 15:50:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:50:37,840 INFO L93 Difference]: Finished difference Result 482 states and 856 transitions. [2020-07-21 15:50:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-21 15:50:37,843 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 3922 [2020-07-21 15:50:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:50:37,851 INFO L225 Difference]: With dead ends: 482 [2020-07-21 15:50:37,851 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 15:50:37,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7894 GetRequests, 7751 SyntacticMatches, 45 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2267, Invalid=7633, Unknown=0, NotChecked=0, Total=9900 [2020-07-21 15:50:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 15:50:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-07-21 15:50:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 15:50:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 326 transitions. [2020-07-21 15:50:37,877 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 326 transitions. Word has length 3922 [2020-07-21 15:50:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:50:37,879 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 326 transitions. [2020-07-21 15:50:37,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-21 15:50:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 326 transitions. [2020-07-21 15:50:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3174 [2020-07-21 15:50:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:50:37,954 INFO L422 BasicCegarLoop]: trace histogram [465, 465, 376, 232, 232, 232, 232, 232, 232, 232, 144, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:50:38,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:50:38,155 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:50:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:50:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -740538915, now seen corresponding path program 17 times [2020-07-21 15:50:38,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:50:38,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633220979] [2020-07-21 15:50:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:50:39,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:50:39,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:50:39,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 7046 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:50:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:50:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27297 refuted. 0 times theorem prover too weak. 578507 trivial. 0 not checked. [2020-07-21 15:50:43,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:50:48,890 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:50:49,026 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:50:49,172 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:50:49,319 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:50:49,454 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:50:49,576 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:50:49,710 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 15:50:49,833 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:50:49,949 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:51:08,213 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:51:08,323 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:51:08,435 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:51:08,553 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:51:09,969 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:51:10,081 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:51:10,204 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:51:10,330 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:51:10,442 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:51:10,552 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:51:10,656 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:51:11,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:11,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:21,358 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:51:22,466 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:51:22,578 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:51:22,688 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:51:22,805 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:51:22,923 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:51:23,026 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:51:23,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:31,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:31,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:37,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:37,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:40,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:42,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:43,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:43,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:44,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27484 refuted. 0 times theorem prover too weak. 578320 trivial. 0 not checked. [2020-07-21 15:51:48,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633220979] [2020-07-21 15:51:48,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:51:48,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 15:51:48,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916874237] [2020-07-21 15:51:48,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:51:48,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:51:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:51:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:51:48,851 INFO L87 Difference]: Start difference. First operand 205 states and 326 transitions. Second operand 29 states. [2020-07-21 15:51:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:51:50,182 INFO L93 Difference]: Finished difference Result 209 states and 329 transitions. [2020-07-21 15:51:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:51:50,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 3173 [2020-07-21 15:51:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:51:50,191 INFO L225 Difference]: With dead ends: 209 [2020-07-21 15:51:50,191 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 15:51:50,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6357 GetRequests, 6294 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:51:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 15:51:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-07-21 15:51:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 15:51:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 325 transitions. [2020-07-21 15:51:50,209 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 325 transitions. Word has length 3173 [2020-07-21 15:51:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:51:50,212 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 325 transitions. [2020-07-21 15:51:50,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:51:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 325 transitions. [2020-07-21 15:51:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5135 [2020-07-21 15:51:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:51:50,512 INFO L422 BasicCegarLoop]: trace histogram [753, 753, 609, 376, 376, 376, 376, 376, 376, 376, 233, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:51:50,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:51:50,726 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:51:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:51:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1603623985, now seen corresponding path program 18 times [2020-07-21 15:51:50,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:51:50,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952001135] [2020-07-21 15:51:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:51:53,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:51:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:51:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 11400 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 15:51:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:52:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 5686 proven. 48748 refuted. 0 times theorem prover too weak. 1545214 trivial. 0 not checked. [2020-07-21 15:52:03,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:52:10,446 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:52:10,597 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:52:10,745 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:52:10,891 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:52:15,205 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:52:15,372 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:52:15,553 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:52:15,725 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:52:15,894 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 15:52:16,040 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 15:52:16,176 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:52:16,302 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:52:16,439 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:52:16,576 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:52:16,709 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:52:16,831 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 15:52:16,949 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:52:17,061 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:52:56,640 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:52:56,747 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:52:56,860 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:52:56,974 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:52:57,865 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:52:57,987 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:52:58,115 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:52:58,250 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:52:59,652 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:52:59,785 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:52:59,931 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:00,077 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:02,315 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:02,466 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:02,626 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:02,781 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:05,996 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:06,166 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:06,331 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:06,493 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:06,661 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:53:06,827 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:53:06,971 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:53:07,102 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:53:07,235 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:53:07,361 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:53:07,489 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:07,610 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:53:07,722 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 15:53:07,826 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 15:53:08,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:53:08,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:53:33,853 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:33,983 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:34,122 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:34,257 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:35,667 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:53:35,800 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:53:35,945 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:36,094 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:38,513 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:38,649 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:38,787 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:38,924 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:39,061 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:53:39,189 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:53:39,310 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:53:39,434 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:53:39,568 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:39,694 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:39,812 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 15:53:39,931 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:40,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:53:40,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:53:53,806 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:53:53,912 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:53:54,554 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:53:54,673 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:53:54,792 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:53:54,910 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:53:55,885 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:56,019 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:56,162 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:56,304 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:57,850 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:53:57,976 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:53:58,100 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:58,226 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:58,351 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:53:58,465 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:53:58,576 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:58,682 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:53:58,885 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 15:53:58,988 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:59,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:53:59,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:08,464 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:54:08,681 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:54:08,792 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:54:09,270 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:54:09,380 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:54:09,495 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:54:09,631 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:54:10,445 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:10,575 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:10,724 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:10,868 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:11,009 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:54:11,137 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:54:11,261 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 15:54:11,377 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:54:11,481 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:54:11,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:11,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:18,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:22,118 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:54:22,586 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:54:22,689 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:54:22,809 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:54:22,926 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:54:23,038 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 15:54:23,144 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 15:54:23,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:23,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:26,572 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:54:26,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:28,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:30,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:30,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:30,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:30,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:31,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:31,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:31,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 5686 proven. 48970 refuted. 0 times theorem prover too weak. 1544992 trivial. 0 not checked. [2020-07-21 15:54:42,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952001135] [2020-07-21 15:54:42,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:54:42,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2020-07-21 15:54:42,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134947531] [2020-07-21 15:54:42,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 15:54:42,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:54:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 15:54:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-07-21 15:54:42,467 INFO L87 Difference]: Start difference. First operand 205 states and 325 transitions. Second operand 31 states. [2020-07-21 15:54:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:54:43,474 INFO L93 Difference]: Finished difference Result 212 states and 342 transitions. [2020-07-21 15:54:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:54:43,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 5134 [2020-07-21 15:54:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:54:43,487 INFO L225 Difference]: With dead ends: 212 [2020-07-21 15:54:43,487 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 15:54:43,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10280 GetRequests, 10212 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 15:54:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 15:54:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-07-21 15:54:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 15:54:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-21 15:54:43,505 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 5134 [2020-07-21 15:54:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:54:43,508 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-21 15:54:43,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 15:54:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-21 15:54:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8308 [2020-07-21 15:54:44,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:54:44,559 INFO L422 BasicCegarLoop]: trace histogram [1219, 1219, 986, 609, 609, 609, 609, 609, 609, 609, 377, 233, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:54:44,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:54:44,773 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:54:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:54:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash -497867032, now seen corresponding path program 19 times [2020-07-21 15:54:44,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:54:44,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686012763] [2020-07-21 15:54:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:54:48,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:54:48,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:54:48,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 18445 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 15:54:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:55:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4195633 backedges. 9420 proven. 86206 refuted. 0 times theorem prover too weak. 4100007 trivial. 0 not checked. [2020-07-21 15:55:19,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:55:22,412 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:55:22,519 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:55:23,440 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:55:23,554 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:55:23,677 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:55:23,797 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:55:25,220 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:55:25,342 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:55:25,475 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:55:25,612 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:55:28,591 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:55:28,788 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:55:28,999 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:55:29,192 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:55:35,298 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:55:35,525 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:55:35,748 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:55:35,979 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:55:47,359 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:55:47,604 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:55:47,858 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:55:48,108 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:55:48,358 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 15:55:48,591 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 15:55:48,817 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 15:55:49,025 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 15:55:49,214 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:55:49,403 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:55:49,595 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:55:49,766 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:55:49,931 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:55:50,095 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:55:50,252 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:55:50,400 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:55:50,536 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 15:55:50,663 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:55:50,783 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:29,487 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:57:29,594 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:57:29,711 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:57:29,826 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:57:30,350 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:57:30,470 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:57:30,584 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:57:30,712 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:57:31,508 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:57:31,644 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:57:31,793 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:57:31,940 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:57:33,160 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:33,315 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:33,480 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:33,644 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:35,542 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:35,720 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:35,906 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:57:36,092 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:57:39,058 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:57:39,243 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:57:39,433 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:57:39,626 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:57:43,606 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:57:43,824 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:57:44,025 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:57:44,242 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:57:51,417 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:57:51,644 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:57:51,883 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:57:52,116 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:57:52,333 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:57:52,546 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 15:57:52,747 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:57:52,952 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:57:53,160 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:57:53,355 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 15:57:53,543 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:57:53,719 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:57:53,886 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 15:57:54,039 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 15:57:54,186 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 15:57:54,319 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 15:57:54,448 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:54,569 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:54,683 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 15:57:55,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:55,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:37,313 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 15:58:52,537 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 15:58:52,642 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 15:58:53,008 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:58:53,113 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:58:53,226 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:58:53,337 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:58:53,851 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:58:53,974 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:58:54,097 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:58:54,940 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:58:55,046 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:58:55,164 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:55,284 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:56,288 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:56,452 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:56,625 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:56,811 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:58,884 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:59,071 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:59,263 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:59,436 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:59:02,728 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:59:02,930 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:59:03,142 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:59:03,354 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:59:08,044 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:59:08,248 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:59:08,469 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:59:08,692 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:59:08,897 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:59:09,088 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 15:59:09,267 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:59:09,461 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 15:59:09,639 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:59:09,809 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:59:09,974 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:59:10,125 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:59:10,257 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 15:59:10,393 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 15:59:10,512 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 15:59:10,618 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:59:10,824 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 15:59:11,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:44,699 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:59:44,807 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:59:44,928 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:59:45,047 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:59:45,588 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:59:45,718 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:59:45,859 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:59:45,999 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:59:46,855 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:59:46,998 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:59:47,153 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:59:47,306 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:59:48,639 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:59:48,803 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:59:49,002 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:59:49,179 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:59:51,214 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:59:51,393 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:59:51,581 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:59:51,787 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:59:55,089 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:59:55,286 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:59:55,498 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:59:55,708 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:59:55,916 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:59:56,111 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:59:56,297 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:59:56,477 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:59:56,645 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 15:59:56,804 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 15:59:56,953 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 15:59:57,094 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 15:59:57,222 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:59:57,338 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 15:59:57,445 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:59:57,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:57,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:00:13,236 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 16:00:13,341 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 16:00:13,887 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:00:14,010 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:00:14,592 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:00:14,719 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:00:14,863 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:00:15,008 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:00:15,841 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:00:15,982 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:00:16,133 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:00:16,279 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:00:17,618 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:00:17,799 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:00:18,081 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 16:00:18,249 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 16:00:20,233 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:00:20,375 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:00:20,527 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:00:20,671 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:00:20,811 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:00:20,975 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:00:21,145 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:00:21,308 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:00:21,463 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:00:21,607 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:00:21,740 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:00:21,866 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:00:21,981 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:00:22,088 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:00:22,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts