/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:20:44,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:20:44,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:20:44,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:20:44,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:20:44,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:20:44,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:20:44,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:20:44,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:20:44,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:20:44,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:20:44,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:20:44,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:20:44,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:20:44,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:20:44,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:20:44,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:20:44,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:20:44,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:20:44,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:20:44,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:20:44,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:20:44,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:20:44,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:20:44,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:20:44,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:20:44,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:20:44,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:20:44,566 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 22:20:44,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:20:44,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:20:44,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:20:44,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:20:44,583 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:20:44,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:20:44,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:20:44,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:20:44,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:20:44,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:20:44,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:20:44,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:20:44,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:20:44,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:20:44,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:20:44,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:20:44,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:20:44,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:20:44,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:20:44,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:20:44,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:20:44,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:44,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:20:44,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:20:44,588 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 22:20:44,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:20:44,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:20:44,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:20:44,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:20:44,889 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:20:44,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 22:20:44,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4583014ec/dabe90b0c3e843ee9a7b706447309da2/FLAGfcf677313 [2020-07-21 22:20:45,365 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:20:45,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 22:20:45,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4583014ec/dabe90b0c3e843ee9a7b706447309da2/FLAGfcf677313 [2020-07-21 22:20:45,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4583014ec/dabe90b0c3e843ee9a7b706447309da2 [2020-07-21 22:20:45,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:20:45,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:20:45,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:20:45,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:20:45,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:20:45,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:45,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5487197f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45, skipping insertion in model container [2020-07-21 22:20:45,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:45,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:20:45,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:20:45,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:20:45,967 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:20:45,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:20:45,998 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:20:45,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45 WrapperNode [2020-07-21 22:20:45,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:20:46,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:20:46,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:20:46,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:20:46,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (1/1) ... [2020-07-21 22:20:46,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:20:46,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:20:46,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:20:46,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:20:46,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (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 22:20:46,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:20:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:20:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 22:20:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:20:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:20:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:20:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 22:20:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:20:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:20:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:20:46,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:20:46,366 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:20:46,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:46 BoogieIcfgContainer [2020-07-21 22:20:46,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:20:46,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:20:46,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:20:46,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:20:46,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:20:45" (1/3) ... [2020-07-21 22:20:46,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480671f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:46, skipping insertion in model container [2020-07-21 22:20:46,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:20:45" (2/3) ... [2020-07-21 22:20:46,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480671f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:20:46, skipping insertion in model container [2020-07-21 22:20:46,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:20:46" (3/3) ... [2020-07-21 22:20:46,378 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-21 22:20:46,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:20:46,397 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:20:46,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:20:46,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:20:46,434 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:20:46,434 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:20:46,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:20:46,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:20:46,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:20:46,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:20:46,435 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:20:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 22:20:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:20:46,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:46,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:46,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 22:20:46,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:46,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69983730] [2020-07-21 22:20:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:46,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:46,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:46,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:20:46,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:46,632 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 22:20:46,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:20:46,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69983730] [2020-07-21 22:20:46,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:20:46,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:20:46,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002306852] [2020-07-21 22:20:46,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:20:46,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:20:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:20:46,661 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 22:20:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:46,755 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 22:20:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:20:46,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:20:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:46,767 INFO L225 Difference]: With dead ends: 35 [2020-07-21 22:20:46,767 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:20:46,770 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 22:20:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:20:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:20:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:20:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:20:46,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 22:20:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:46,817 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:20:46,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:20:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:20:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:20:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:46,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:47,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:47,036 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 22:20:47,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:47,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026718140] [2020-07-21 22:20:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:47,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:20:47,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:20:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:47,106 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 22:20:47,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:20:47,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026718140] [2020-07-21 22:20:47,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:20:47,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:20:47,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539929084] [2020-07-21 22:20:47,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:20:47,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:20:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:20:47,111 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 22:20:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:47,174 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 22:20:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:20:47,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:20:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:47,176 INFO L225 Difference]: With dead ends: 27 [2020-07-21 22:20:47,176 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 22:20:47,178 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 22:20:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 22:20:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 22:20:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:20:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:20:47,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 22:20:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:47,187 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:20:47,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:20:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:20:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:20:47,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:47,190 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 22:20:47,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:47,404 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 22:20:47,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:47,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724965134] [2020-07-21 22:20:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:47,448 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:20:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:47,531 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 22:20:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:47,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:47,803 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 22:20:47,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724965134] [2020-07-21 22:20:47,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:47,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:20:47,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820899847] [2020-07-21 22:20:47,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:20:47,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:20:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:20:47,806 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 22:20:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:47,912 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 22:20:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:20:47,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 22:20:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:47,914 INFO L225 Difference]: With dead ends: 32 [2020-07-21 22:20:47,915 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 22:20:47,916 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 22:20:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 22:20:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 22:20:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:20:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:20:47,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 22:20:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:47,925 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:20:47,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:20:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:20:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:20:47,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:47,928 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 22:20:48,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:48,143 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 22:20:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:48,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988209811] [2020-07-21 22:20:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:48,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:20:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:48,231 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 22:20:48,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:48,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:48,435 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 22:20:48,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988209811] [2020-07-21 22:20:48,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:48,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:20:48,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628187191] [2020-07-21 22:20:48,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:20:48,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:20:48,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:20:48,439 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 22:20:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:48,557 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 22:20:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:20:48,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 22:20:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:48,562 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:20:48,562 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 22:20:48,566 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 22:20:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 22:20:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 22:20:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:20:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:20:48,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 22:20:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:48,582 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:20:48,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:20:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:20:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:20:48,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:48,587 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 22:20:48,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:48,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 22:20:48,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:48,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636072941] [2020-07-21 22:20:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:48,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:20:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:48,886 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 22:20:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:49,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,247 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 22:20:49,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636072941] [2020-07-21 22:20:49,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:49,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:20:49,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302487572] [2020-07-21 22:20:49,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:20:49,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:20:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:20:49,251 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 22:20:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:49,432 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 22:20:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:20:49,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 22:20:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:49,435 INFO L225 Difference]: With dead ends: 42 [2020-07-21 22:20:49,435 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 22:20:49,436 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 22:20:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 22:20:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 22:20:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:20:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:20:49,448 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 22:20:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:49,448 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:20:49,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:20:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:20:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 22:20:49,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:49,451 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 22:20:49,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:49,652 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 22:20:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:49,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992302933] [2020-07-21 22:20:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:49,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:49,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:20:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:49,731 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 22:20:49,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:49,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,042 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 22:20:50,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992302933] [2020-07-21 22:20:50,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:50,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:20:50,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385519367] [2020-07-21 22:20:50,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:20:50,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:50,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:20:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:20:50,045 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 22:20:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:50,175 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 22:20:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:20:50,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 22:20:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:50,179 INFO L225 Difference]: With dead ends: 47 [2020-07-21 22:20:50,179 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 22:20:50,180 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 22:20:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 22:20:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 22:20:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:20:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:20:50,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 22:20:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:50,193 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:20:50,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:20:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:20:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 22:20:50,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:50,195 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 22:20:50,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:50,403 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 22:20:50,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:50,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278304327] [2020-07-21 22:20:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:50,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:20:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:20:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:50,496 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 22:20:50,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:50,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,161 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 22:20:51,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278304327] [2020-07-21 22:20:51,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:51,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:20:51,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304963593] [2020-07-21 22:20:51,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:20:51,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:20:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:20:51,165 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 22:20:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:51,327 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 22:20:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:20:51,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 22:20:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:51,334 INFO L225 Difference]: With dead ends: 52 [2020-07-21 22:20:51,334 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:20:51,335 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 22:20:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:20:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 22:20:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:20:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:20:51,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 22:20:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:51,358 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:20:51,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:20:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:20:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 22:20:51,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:51,363 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 22:20:51,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:51,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:51,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 22:20:51,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:51,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930684356] [2020-07-21 22:20:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:51,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:51,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:20:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 22:20:51,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:52,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 22:20:52,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930684356] [2020-07-21 22:20:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:52,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:20:52,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639299174] [2020-07-21 22:20:52,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:20:52,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:52,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:20:52,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:20:52,297 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 22:20:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:52,430 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 22:20:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:20:52,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 22:20:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:52,433 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:20:52,433 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:20:52,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 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 22:20:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:20:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 22:20:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:20:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:20:52,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 22:20:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:52,446 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:20:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:20:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:20:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 22:20:52,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:52,449 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:52,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:52,665 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:52,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 22:20:52,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:52,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990002276] [2020-07-21 22:20:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:52,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:52,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 22:20:52,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:53,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 22:20:53,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990002276] [2020-07-21 22:20:53,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:53,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:20:53,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710847346] [2020-07-21 22:20:53,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:20:53,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:20:53,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:20:53,800 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 22:20:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:54,092 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 22:20:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:20:54,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 22:20:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:54,095 INFO L225 Difference]: With dead ends: 62 [2020-07-21 22:20:54,095 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 22:20:54,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:20:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 22:20:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 22:20:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:20:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:20:54,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 22:20:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:54,109 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:20:54,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:20:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:20:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 22:20:54,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:54,112 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:54,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:54,327 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 22:20:54,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:54,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854457901] [2020-07-21 22:20:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:54,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:54,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:20:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 22:20:54,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:55,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 22:20:55,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854457901] [2020-07-21 22:20:55,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:55,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:20:55,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236527845] [2020-07-21 22:20:55,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:20:55,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:20:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:20:55,576 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 22:20:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:55,734 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 22:20:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:20:55,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 22:20:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:55,738 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:20:55,738 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 22:20:55,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:20:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 22:20:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 22:20:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:20:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:20:55,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 22:20:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:55,752 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:20:55,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:20:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:20:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 22:20:55,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:55,757 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:55,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:55,970 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 22:20:55,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:55,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200426533] [2020-07-21 22:20:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:56,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 22:20:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:57,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:57,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 22:20:58,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200426533] [2020-07-21 22:20:58,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:58,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:20:58,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191727649] [2020-07-21 22:20:58,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:20:58,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:58,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:20:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:20:58,055 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 22:20:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:58,274 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 22:20:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:20:58,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 22:20:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:58,280 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:20:58,281 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 22:20:58,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 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 22:20:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 22:20:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 22:20:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:20:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:20:58,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 22:20:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:58,308 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:20:58,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:20:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:20:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 22:20:58,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:58,314 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:58,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:58,530 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 22:20:58,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:58,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292423754] [2020-07-21 22:20:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:20:58,633 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:20:58,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 22:20:58,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:59,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 22:21:00,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292423754] [2020-07-21 22:21:00,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:00,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 22:21:00,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132629016] [2020-07-21 22:21:00,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:00,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:00,633 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 16 states. [2020-07-21 22:21:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:00,880 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 22:21:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:00,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 299 [2020-07-21 22:21:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:00,884 INFO L225 Difference]: With dead ends: 77 [2020-07-21 22:21:00,884 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:21:00,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:21:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:21:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 22:21:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:21:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:21:00,897 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 22:21:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:00,898 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:21:00,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:21:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 22:21:00,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:00,911 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:01,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:01,126 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 22:21:01,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:01,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102109048] [2020-07-21 22:21:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:01,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 22:21:01,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:03,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 22:21:04,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102109048] [2020-07-21 22:21:04,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:04,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:04,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973846948] [2020-07-21 22:21:04,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:04,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:04,863 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 18 states. [2020-07-21 22:21:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:05,311 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 22:21:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:05,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 507 [2020-07-21 22:21:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:05,318 INFO L225 Difference]: With dead ends: 82 [2020-07-21 22:21:05,318 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:21:05,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:21:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 22:21:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 22:21:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 22:21:05,343 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 22:21:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:05,345 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 22:21:05,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 22:21:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 22:21:05,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:05,349 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:05,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:05,564 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 22:21:05,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:05,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050372074] [2020-07-21 22:21:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:05,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 648 proven. 1709 refuted. 0 times theorem prover too weak. 9325 trivial. 0 not checked. [2020-07-21 22:21:05,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:07,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:07,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:08,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 652 proven. 1756 refuted. 0 times theorem prover too weak. 9274 trivial. 0 not checked. [2020-07-21 22:21:09,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050372074] [2020-07-21 22:21:09,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:09,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:09,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959384269] [2020-07-21 22:21:09,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:09,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:09,064 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 18 states. [2020-07-21 22:21:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:09,357 INFO L93 Difference]: Finished difference Result 147 states and 749 transitions. [2020-07-21 22:21:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:09,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 450 [2020-07-21 22:21:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:09,361 INFO L225 Difference]: With dead ends: 147 [2020-07-21 22:21:09,361 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 22:21:09,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 22:21:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 22:21:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:21:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 122 transitions. [2020-07-21 22:21:09,391 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 122 transitions. Word has length 450 [2020-07-21 22:21:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:09,393 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 122 transitions. [2020-07-21 22:21:09,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 122 transitions. [2020-07-21 22:21:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 22:21:09,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:09,398 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:09,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:09,612 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-07-21 22:21:09,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:09,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850660405] [2020-07-21 22:21:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:09,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 467 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [2020-07-21 22:21:10,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 518 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2020-07-21 22:21:12,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850660405] [2020-07-21 22:21:12,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:12,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:12,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618363173] [2020-07-21 22:21:12,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:12,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:12,668 INFO L87 Difference]: Start difference. First operand 70 states and 122 transitions. Second operand 18 states. [2020-07-21 22:21:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:12,930 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2020-07-21 22:21:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:12,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 327 [2020-07-21 22:21:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:12,937 INFO L225 Difference]: With dead ends: 120 [2020-07-21 22:21:12,937 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 22:21:12,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 622 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 22:21:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-07-21 22:21:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:21:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 167 transitions. [2020-07-21 22:21:12,967 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 167 transitions. Word has length 327 [2020-07-21 22:21:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:12,968 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 167 transitions. [2020-07-21 22:21:12,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 167 transitions. [2020-07-21 22:21:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 22:21:12,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:12,973 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:13,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:13,188 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash -301446619, now seen corresponding path program 8 times [2020-07-21 22:21:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:13,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665742393] [2020-07-21 22:21:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:13,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:13,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:21:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 494 proven. 483 refuted. 0 times theorem prover too weak. 3624 trivial. 0 not checked. [2020-07-21 22:21:13,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:14,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 500 proven. 505 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2020-07-21 22:21:14,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665742393] [2020-07-21 22:21:14,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:14,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 22:21:14,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474235177] [2020-07-21 22:21:14,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:21:14,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:21:14,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:21:14,871 INFO L87 Difference]: Start difference. First operand 90 states and 167 transitions. Second operand 14 states. [2020-07-21 22:21:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:15,029 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2020-07-21 22:21:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:21:15,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 287 [2020-07-21 22:21:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:15,034 INFO L225 Difference]: With dead ends: 135 [2020-07-21 22:21:15,034 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 22:21:15,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 550 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 22:21:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2020-07-21 22:21:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 22:21:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 181 transitions. [2020-07-21 22:21:15,053 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 181 transitions. Word has length 287 [2020-07-21 22:21:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:15,054 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 181 transitions. [2020-07-21 22:21:15,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:21:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 181 transitions. [2020-07-21 22:21:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 22:21:15,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:15,059 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:15,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:15,273 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1320340794, now seen corresponding path program 9 times [2020-07-21 22:21:15,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:15,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712389629] [2020-07-21 22:21:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:15,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 369 proven. 1029 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2020-07-21 22:21:15,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:17,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:17,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 375 proven. 1074 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2020-07-21 22:21:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712389629] [2020-07-21 22:21:18,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:18,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:18,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309830284] [2020-07-21 22:21:18,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:18,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:18,156 INFO L87 Difference]: Start difference. First operand 93 states and 181 transitions. Second operand 18 states. [2020-07-21 22:21:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:18,448 INFO L93 Difference]: Finished difference Result 183 states and 362 transitions. [2020-07-21 22:21:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:18,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 299 [2020-07-21 22:21:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:18,451 INFO L225 Difference]: With dead ends: 183 [2020-07-21 22:21:18,451 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:21:18,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 566 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:21:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-07-21 22:21:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 22:21:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2020-07-21 22:21:18,468 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 299 [2020-07-21 22:21:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:18,469 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2020-07-21 22:21:18,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2020-07-21 22:21:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 22:21:18,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:18,474 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 22:21:18,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:18,688 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 10 times [2020-07-21 22:21:18,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:18,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775454225] [2020-07-21 22:21:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:18,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:21:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-21 22:21:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 22:21:19,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 22:21:22,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775454225] [2020-07-21 22:21:22,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:22,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 22:21:22,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881170243] [2020-07-21 22:21:22,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:21:22,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:21:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:21:22,620 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand 28 states. [2020-07-21 22:21:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:23,075 INFO L93 Difference]: Finished difference Result 197 states and 342 transitions. [2020-07-21 22:21:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 22:21:23,075 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-21 22:21:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:23,081 INFO L225 Difference]: With dead ends: 197 [2020-07-21 22:21:23,082 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 22:21:23,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:21:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 22:21:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-07-21 22:21:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:21:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 22:21:23,116 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 286 [2020-07-21 22:21:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:23,116 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 22:21:23,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:21:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 22:21:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-21 22:21:23,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:23,129 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:23,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:23,376 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1237982994, now seen corresponding path program 11 times [2020-07-21 22:21:23,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:23,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262133654] [2020-07-21 22:21:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:23,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:21:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 602 proven. 727 refuted. 0 times theorem prover too weak. 4568 trivial. 0 not checked. [2020-07-21 22:21:23,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:24,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:24,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 610 proven. 756 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2020-07-21 22:21:25,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262133654] [2020-07-21 22:21:25,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:25,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 22:21:25,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38487023] [2020-07-21 22:21:25,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:25,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:25,832 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 16 states. [2020-07-21 22:21:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:26,028 INFO L93 Difference]: Finished difference Result 196 states and 344 transitions. [2020-07-21 22:21:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:26,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 323 [2020-07-21 22:21:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:26,034 INFO L225 Difference]: With dead ends: 196 [2020-07-21 22:21:26,035 INFO L226 Difference]: Without dead ends: 184 [2020-07-21 22:21:26,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 618 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:21:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-21 22:21:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2020-07-21 22:21:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:21:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 22:21:26,067 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 323 [2020-07-21 22:21:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:26,067 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 22:21:26,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 22:21:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 22:21:26,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:26,079 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 34, 25, 25, 25, 25, 25, 25, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:26,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:26,294 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -982477528, now seen corresponding path program 12 times [2020-07-21 22:21:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:26,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966045091] [2020-07-21 22:21:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:26,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:26,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:21:26,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6861 backedges. 396 proven. 1123 refuted. 0 times theorem prover too weak. 5342 trivial. 0 not checked. [2020-07-21 22:21:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:28,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:28,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:28,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:28,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6861 backedges. 397 proven. 1157 refuted. 0 times theorem prover too weak. 5307 trivial. 0 not checked. [2020-07-21 22:21:29,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966045091] [2020-07-21 22:21:29,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:29,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:21:29,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990770654] [2020-07-21 22:21:29,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:29,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:29,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:29,367 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 18 states. [2020-07-21 22:21:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:29,655 INFO L93 Difference]: Finished difference Result 253 states and 465 transitions. [2020-07-21 22:21:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:29,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 347 [2020-07-21 22:21:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:29,660 INFO L225 Difference]: With dead ends: 253 [2020-07-21 22:21:29,660 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:21:29,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 664 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:21:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:21:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 22:21:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:21:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 247 transitions. [2020-07-21 22:21:29,695 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 247 transitions. Word has length 347 [2020-07-21 22:21:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:29,695 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 247 transitions. [2020-07-21 22:21:29,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 247 transitions. [2020-07-21 22:21:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 22:21:29,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:29,706 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 33, 24, 24, 24, 24, 24, 24, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:29,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:29,920 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -621886049, now seen corresponding path program 13 times [2020-07-21 22:21:29,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:29,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472218062] [2020-07-21 22:21:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:30,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:21:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6336 backedges. 410 proven. 826 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2020-07-21 22:21:30,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:31,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:31,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6336 backedges. 414 proven. 846 refuted. 0 times theorem prover too weak. 5076 trivial. 0 not checked. [2020-07-21 22:21:32,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472218062] [2020-07-21 22:21:32,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:32,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 22:21:32,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537695607] [2020-07-21 22:21:32,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:32,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:32,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:32,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:32,100 INFO L87 Difference]: Start difference. First operand 147 states and 247 transitions. Second operand 16 states. [2020-07-21 22:21:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:32,285 INFO L93 Difference]: Finished difference Result 202 states and 342 transitions. [2020-07-21 22:21:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:32,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 334 [2020-07-21 22:21:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:32,289 INFO L225 Difference]: With dead ends: 202 [2020-07-21 22:21:32,290 INFO L226 Difference]: Without dead ends: 182 [2020-07-21 22:21:32,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 642 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-21 22:21:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2020-07-21 22:21:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 22:21:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 250 transitions. [2020-07-21 22:21:32,319 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 250 transitions. Word has length 334 [2020-07-21 22:21:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:32,319 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 250 transitions. [2020-07-21 22:21:32,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 250 transitions. [2020-07-21 22:21:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:32,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:32,329 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:32,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:32,545 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 500297194, now seen corresponding path program 14 times [2020-07-21 22:21:32,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:32,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795238441] [2020-07-21 22:21:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:32,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:32,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:21:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 526 proven. 560 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 22:21:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:33,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 528 proven. 582 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 22:21:34,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795238441] [2020-07-21 22:21:34,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:34,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 22:21:34,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515226051] [2020-07-21 22:21:34,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:34,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:34,617 INFO L87 Difference]: Start difference. First operand 150 states and 250 transitions. Second operand 16 states. [2020-07-21 22:21:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:34,808 INFO L93 Difference]: Finished difference Result 220 states and 356 transitions. [2020-07-21 22:21:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:34,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 22:21:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:34,815 INFO L225 Difference]: With dead ends: 220 [2020-07-21 22:21:34,815 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 22:21:34,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 22:21:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 155. [2020-07-21 22:21:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-21 22:21:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2020-07-21 22:21:34,849 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 298 [2020-07-21 22:21:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:34,849 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2020-07-21 22:21:34,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:34,850 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2020-07-21 22:21:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-07-21 22:21:34,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:34,859 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 34, 22, 22, 22, 22, 22, 22, 22, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:35,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:35,072 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash -738474187, now seen corresponding path program 15 times [2020-07-21 22:21:35,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:35,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469724416] [2020-07-21 22:21:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:35,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:35,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 671 proven. 793 refuted. 0 times theorem prover too weak. 3981 trivial. 0 not checked. [2020-07-21 22:21:35,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:37,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:38,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 673 proven. 842 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 22:21:38,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469724416] [2020-07-21 22:21:38,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:38,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:38,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701993308] [2020-07-21 22:21:38,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:38,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:38,238 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand 18 states. [2020-07-21 22:21:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:38,492 INFO L93 Difference]: Finished difference Result 194 states and 308 transitions. [2020-07-21 22:21:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:38,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 311 [2020-07-21 22:21:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:38,497 INFO L225 Difference]: With dead ends: 194 [2020-07-21 22:21:38,498 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 22:21:38,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 590 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 22:21:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 129. [2020-07-21 22:21:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 22:21:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 213 transitions. [2020-07-21 22:21:38,522 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 213 transitions. Word has length 311 [2020-07-21 22:21:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:38,522 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 213 transitions. [2020-07-21 22:21:38,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 213 transitions. [2020-07-21 22:21:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:38,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:38,530 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:38,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:38,744 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1063222156, now seen corresponding path program 16 times [2020-07-21 22:21:38,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:38,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759101094] [2020-07-21 22:21:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:21:39,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:21:39,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:39,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:21:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 934 proven. 152 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 22:21:39,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:39,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 930 proven. 180 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 22:21:40,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759101094] [2020-07-21 22:21:40,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:40,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 22:21:40,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262929196] [2020-07-21 22:21:40,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:40,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:40,894 INFO L87 Difference]: Start difference. First operand 129 states and 213 transitions. Second operand 16 states. [2020-07-21 22:21:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:41,127 INFO L93 Difference]: Finished difference Result 153 states and 240 transitions. [2020-07-21 22:21:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:41,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 22:21:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:41,130 INFO L225 Difference]: With dead ends: 153 [2020-07-21 22:21:41,130 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 22:21:41,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 22:21:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2020-07-21 22:21:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 22:21:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 213 transitions. [2020-07-21 22:21:41,149 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 213 transitions. Word has length 298 [2020-07-21 22:21:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:41,150 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 213 transitions. [2020-07-21 22:21:41,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 213 transitions. [2020-07-21 22:21:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:41,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:41,156 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:41,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:41,370 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -606289430, now seen corresponding path program 17 times [2020-07-21 22:21:41,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:41,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264674914] [2020-07-21 22:21:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:41,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:21:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 614 proven. 659 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 22:21:41,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:43,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 611 proven. 697 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 22:21:44,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264674914] [2020-07-21 22:21:44,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:44,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:21:44,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998690375] [2020-07-21 22:21:44,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:44,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:44,040 INFO L87 Difference]: Start difference. First operand 129 states and 213 transitions. Second operand 18 states. [2020-07-21 22:21:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:44,289 INFO L93 Difference]: Finished difference Result 168 states and 265 transitions. [2020-07-21 22:21:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:44,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 22:21:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:44,293 INFO L225 Difference]: With dead ends: 168 [2020-07-21 22:21:44,294 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 22:21:44,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:21:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 22:21:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2020-07-21 22:21:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 22:21:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 202 transitions. [2020-07-21 22:21:44,313 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 202 transitions. Word has length 298 [2020-07-21 22:21:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:44,314 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 202 transitions. [2020-07-21 22:21:44,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 202 transitions. [2020-07-21 22:21:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:44,320 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:44,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:44,536 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash 476971754, now seen corresponding path program 18 times [2020-07-21 22:21:44,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099243947] [2020-07-21 22:21:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:44,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 22:21:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 272 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 22:21:44,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:45,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:45,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 296 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 22:21:46,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099243947] [2020-07-21 22:21:46,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:46,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 22:21:46,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802976500] [2020-07-21 22:21:46,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:21:46,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:46,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:21:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:21:46,622 INFO L87 Difference]: Start difference. First operand 124 states and 202 transitions. Second operand 16 states. [2020-07-21 22:21:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:46,844 INFO L93 Difference]: Finished difference Result 196 states and 321 transitions. [2020-07-21 22:21:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:21:46,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 22:21:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:46,851 INFO L225 Difference]: With dead ends: 196 [2020-07-21 22:21:46,851 INFO L226 Difference]: Without dead ends: 189 [2020-07-21 22:21:46,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-21 22:21:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 121. [2020-07-21 22:21:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:21:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 199 transitions. [2020-07-21 22:21:46,875 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 199 transitions. Word has length 298 [2020-07-21 22:21:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:46,876 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 199 transitions. [2020-07-21 22:21:46,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:21:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 199 transitions. [2020-07-21 22:21:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:46,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:46,881 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:47,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:47,096 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash 264460084, now seen corresponding path program 19 times [2020-07-21 22:21:47,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:47,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475544122] [2020-07-21 22:21:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:47,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:21:47,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:47,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:21:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 441 proven. 832 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 22:21:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:48,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 440 proven. 868 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 22:21:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475544122] [2020-07-21 22:21:49,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:49,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:21:49,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149966605] [2020-07-21 22:21:49,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:49,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:49,777 INFO L87 Difference]: Start difference. First operand 121 states and 199 transitions. Second operand 18 states. [2020-07-21 22:21:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:50,009 INFO L93 Difference]: Finished difference Result 147 states and 227 transitions. [2020-07-21 22:21:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:50,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 22:21:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:50,013 INFO L225 Difference]: With dead ends: 147 [2020-07-21 22:21:50,013 INFO L226 Difference]: Without dead ends: 130 [2020-07-21 22:21:50,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:21:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-21 22:21:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2020-07-21 22:21:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 22:21:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 195 transitions. [2020-07-21 22:21:50,031 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 195 transitions. Word has length 298 [2020-07-21 22:21:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:50,031 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 195 transitions. [2020-07-21 22:21:50,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 195 transitions. [2020-07-21 22:21:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:50,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:50,036 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:50,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:50,251 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1448945942, now seen corresponding path program 20 times [2020-07-21 22:21:50,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:50,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217613199] [2020-07-21 22:21:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:50,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:21:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:21:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 960 proven. 313 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 22:21:50,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:51,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:52,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 955 proven. 353 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 22:21:53,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217613199] [2020-07-21 22:21:53,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:53,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:21:53,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46744644] [2020-07-21 22:21:53,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:53,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:53,011 INFO L87 Difference]: Start difference. First operand 121 states and 195 transitions. Second operand 18 states. [2020-07-21 22:21:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:53,296 INFO L93 Difference]: Finished difference Result 181 states and 282 transitions. [2020-07-21 22:21:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:53,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 22:21:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:53,302 INFO L225 Difference]: With dead ends: 181 [2020-07-21 22:21:53,302 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 22:21:53,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:21:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 22:21:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 81. [2020-07-21 22:21:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 22:21:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2020-07-21 22:21:53,320 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 298 [2020-07-21 22:21:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:53,321 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2020-07-21 22:21:53,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2020-07-21 22:21:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 22:21:53,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:53,324 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:53,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:53,537 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash -258866501, now seen corresponding path program 21 times [2020-07-21 22:21:53,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:53,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488813134] [2020-07-21 22:21:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:53,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:53,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:21:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 270 proven. 1062 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2020-07-21 22:21:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:55,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 280 proven. 1103 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2020-07-21 22:21:56,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488813134] [2020-07-21 22:21:56,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:56,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 22:21:56,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347894035] [2020-07-21 22:21:56,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:56,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:56,741 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 18 states. [2020-07-21 22:21:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:57,026 INFO L93 Difference]: Finished difference Result 180 states and 281 transitions. [2020-07-21 22:21:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:21:57,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 287 [2020-07-21 22:21:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:57,029 INFO L225 Difference]: With dead ends: 180 [2020-07-21 22:21:57,029 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:21:57,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 542 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:21:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:21:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-21 22:21:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 22:21:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-07-21 22:21:57,045 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 287 [2020-07-21 22:21:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:57,045 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-07-21 22:21:57,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:21:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-07-21 22:21:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:21:57,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:57,048 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:57,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:57,263 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:57,264 INFO L82 PathProgramCache]: Analyzing trace with hash -551621334, now seen corresponding path program 22 times [2020-07-21 22:21:57,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:57,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395259460] [2020-07-21 22:21:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:57,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:21:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 321 proven. 952 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 22:21:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:59,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 324 proven. 984 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 22:21:59,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395259460] [2020-07-21 22:21:59,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:59,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:21:59,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031911997] [2020-07-21 22:21:59,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:21:59,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:21:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:21:59,974 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-07-21 22:22:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:00,188 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-07-21 22:22:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:22:00,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 22:22:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:00,191 INFO L225 Difference]: With dead ends: 105 [2020-07-21 22:22:00,191 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:22:00,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:22:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:22:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-21 22:22:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 22:22:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-21 22:22:00,200 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 298 [2020-07-21 22:22:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:00,200 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-21 22:22:00,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:22:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-21 22:22:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 22:22:00,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:00,203 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:00,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:00,416 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2133540566, now seen corresponding path program 23 times [2020-07-21 22:22:00,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:00,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543887079] [2020-07-21 22:22:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:00,712 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:22:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 328 proven. 1119 refuted. 0 times theorem prover too weak. 3533 trivial. 0 not checked. [2020-07-21 22:22:00,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:02,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:03,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 322 proven. 1176 refuted. 0 times theorem prover too weak. 3482 trivial. 0 not checked. [2020-07-21 22:22:04,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543887079] [2020-07-21 22:22:04,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:04,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:22:04,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645696197] [2020-07-21 22:22:04,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:22:04,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:04,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:22:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:22:04,006 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 20 states. [2020-07-21 22:22:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:04,337 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-07-21 22:22:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:22:04,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 298 [2020-07-21 22:22:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:04,339 INFO L225 Difference]: With dead ends: 138 [2020-07-21 22:22:04,339 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:22:04,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:22:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:22:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:22:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:22:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:22:04,344 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 298 [2020-07-21 22:22:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:04,345 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:22:04,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:22:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:22:04,345 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:22:04,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:04,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:22:07,559 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:22:08,181 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 119 [2020-07-21 22:22:09,534 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 370 DAG size of output: 188 [2020-07-21 22:22:11,184 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:22:13,018 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:22:14,776 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 406 DAG size of output: 207 [2020-07-21 22:22:16,596 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:22:18,100 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 393 DAG size of output: 195 [2020-07-21 22:22:18,509 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 119 [2020-07-21 22:22:20,343 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:22:21,638 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 380 DAG size of output: 201 [2020-07-21 22:22:23,206 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 400 DAG size of output: 196 [2020-07-21 22:22:25,063 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:22:26,535 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 393 DAG size of output: 195 [2020-07-21 22:22:26,951 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 119 [2020-07-21 22:22:28,776 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:22:30,344 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 403 DAG size of output: 208 [2020-07-21 22:22:32,071 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 410 DAG size of output: 211 [2020-07-21 22:22:33,885 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:22:35,564 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 412 DAG size of output: 196 [2020-07-21 22:22:35,927 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 115 [2020-07-21 22:22:37,589 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 412 DAG size of output: 196 [2020-07-21 22:22:39,405 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 422 DAG size of output: 211 [2020-07-21 22:22:39,548 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:39,925 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 115 [2020-07-21 22:22:40,235 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 105 [2020-07-21 22:22:40,620 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 121 [2020-07-21 22:22:40,762 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:40,904 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:41,008 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2020-07-21 22:22:42,040 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 358 DAG size of output: 180 [2020-07-21 22:22:42,181 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:42,363 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:43,969 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:22:44,157 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:44,545 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:22:44,941 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:22:45,084 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:46,709 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:22:47,905 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 369 DAG size of output: 193 [2020-07-21 22:22:48,143 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:49,788 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:22:51,949 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 429 DAG size of output: 223 [2020-07-21 22:22:52,343 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:22:53,214 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 176 [2020-07-21 22:22:54,844 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:22:55,334 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 179 [2020-07-21 22:22:55,957 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 147 [2020-07-21 22:22:56,099 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:22:56,718 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 147 [2020-07-21 22:22:58,544 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:22:58,962 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:22:59,107 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 22:23:00,912 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:01,763 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 159 [2020-07-21 22:23:03,403 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:23:05,350 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:06,956 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:23:07,094 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 22:23:08,928 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:09,325 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:23:10,097 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 159 [2020-07-21 22:23:11,685 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:23:13,522 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:14,019 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:23:15,629 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:23:15,767 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 22:23:16,169 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 124 [2020-07-21 22:23:17,980 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:18,388 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:23:20,148 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 411 DAG size of output: 207 [2020-07-21 22:23:21,971 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:23,543 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:23:23,686 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 73 [2020-07-21 22:23:24,087 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 119 [2020-07-21 22:23:25,930 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:23:27,577 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 404 DAG size of output: 206 [2020-07-21 22:23:29,407 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 423 DAG size of output: 207 [2020-07-21 22:23:30,956 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:23:31,393 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 133 [2020-07-21 22:23:33,235 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:23:34,987 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 406 DAG size of output: 207 [2020-07-21 22:23:35,379 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 119 [2020-07-21 22:23:37,207 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 418 DAG size of output: 207 [2020-07-21 22:23:38,806 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 399 DAG size of output: 206 [2020-07-21 22:23:44,977 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 423 DAG size of output: 42 [2020-07-21 22:23:45,007 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:23:45,007 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:23:45,007 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:23:45,007 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:23:45,007 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:23:45,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:23:45,008 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-21 22:23:45,008 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-21 22:23:45,008 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 22:23:45,008 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 22:23:45,008 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-21 22:23:45,009 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-21 22:23:45,009 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 22:23:45,010 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse8 (<= |fibo_#in~n| 3)) (.cse9 (= |fibo_#t~ret0| 1)) (.cse5 (<= fibo_~n |fibo_#in~n|)) (.cse6 (<= |fibo_#in~n| fibo_~n)) (.cse4 (<= 4 |fibo_#in~n|))) (let ((.cse7 (and .cse4 (= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4))) (.cse0 (and .cse5 .cse6 (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|))) (.cse1 (and .cse9 (<= |fibo_#in~n| 2) (<= 2 |fibo_#in~n|))) (.cse2 (and .cse5 .cse6 (<= 7 |fibo_#in~n|))) (.cse3 (and .cse9 (<= 3 |fibo_#in~n|) .cse8))) (and (or .cse0 .cse1 .cse2 .cse3 (and .cse4 .cse5 .cse6 (<= |fibo_#in~n| 5))) (or (<= |fibo_#in~n| 6) (<= 8 |fibo_#in~n|) (= |fibo_#t~ret0| 8)) (or .cse7 (<= 5 |fibo_#in~n|) (and .cse5 .cse6 .cse8)) (or .cse7 .cse0 .cse1 .cse2 .cse3 (= |fibo_#t~ret0| 3))))) [2020-07-21 22:23:45,010 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-21 22:23:45,010 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-21 22:23:45,010 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-21 22:23:45,010 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-21 22:23:45,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:23:45 BoogieIcfgContainer [2020-07-21 22:23:45,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:23:45,017 INFO L168 Benchmark]: Toolchain (without parser) took 179263.65 ms. Allocated memory was 143.1 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 100.9 MB in the beginning and 932.3 MB in the end (delta: -831.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2020-07-21 22:23:45,018 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 22:23:45,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.20 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 91.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:23:45,018 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 143.1 MB. Free memory was 91.5 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:23:45,018 INFO L168 Benchmark]: RCFGBuilder took 341.18 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 89.8 MB in the beginning and 168.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:23:45,019 INFO L168 Benchmark]: TraceAbstraction took 178644.69 ms. Allocated memory was 201.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 168.6 MB in the beginning and 932.3 MB in the end (delta: -763.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2020-07-21 22:23:45,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory is still 118.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.20 ms. Allocated memory is still 143.1 MB. Free memory was 100.5 MB in the beginning and 91.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 143.1 MB. Free memory was 91.5 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.18 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 89.8 MB in the beginning and 168.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 178644.69 ms. Allocated memory was 201.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 168.6 MB in the beginning and 932.3 MB in the end (delta: -763.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 78.1s, OverallIterations: 31, TraceHistogramMax: 77, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 100.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 824 SDtfs, 1051 SDslu, 3632 SDs, 0 SdLazy, 4335 SolverSat, 1504 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14817 GetRequests, 13916 SyntacticMatches, 330 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 645 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 296 PreInvPairs, 16181 NumberOfFragments, 171 HoareAnnotationTreeSize, 296 FomulaSimplifications, 18819088907 FormulaSimplificationTreeSizeReduction, 94.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2866139 FormulaSimplificationTreeSizeReductionInter, 6.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 58.2s InterpolantComputationTime, 7355 NumberOfCodeBlocks, 3429 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 14623 ConstructedInterpolants, 0 QuantifiedInterpolants, 6591842 SizeOfPredicates, 182 NumberOfNonLiveVariables, 7621 ConjunctsInSsa, 541 ConjunctsInUnsatCore, 60 InterpolantComputations, 2 PerfectInterpolantSequences, 217829/258216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...