/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --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_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:34:30,392 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 13:34:30,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:34:30,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:34:30,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:34:30,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:34:30,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:34:30,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:34:30,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:34:30,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:34:30,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:34:30,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:34:30,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:34:30,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:34:30,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:34:30,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:34:30,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:34:30,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:34:30,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:34:30,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:34:30,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:34:30,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:34:30,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:34:30,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:34:30,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:34:30,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:34:30,523 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 [2020-07-20 13:34:30,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:34:30,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:34:30,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:34:30,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:34:30,568 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:34:30,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:34:30,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:34:30,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:34:30,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:34:30,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:34:30,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:34:30,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:34:30,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:34:30,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:34:30,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:34:30,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:34:30,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:34:30,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:34:30,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:34:30,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:34:30,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:34:30,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:34:30,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:34:30,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:34:30,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:34:30,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:34:30,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:30,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:34:30,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:34:30,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-20 13:34:30,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:34:30,975 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:34:30,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:34:30,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:34:30,983 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:34:30,985 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-20 13:34:31,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ceda9e5/62d461a3f2bc4c649bb9e8dcd7e36b6a/FLAG46a0eabed [2020-07-20 13:34:31,673 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:34:31,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-20 13:34:31,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ceda9e5/62d461a3f2bc4c649bb9e8dcd7e36b6a/FLAG46a0eabed [2020-07-20 13:34:32,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23ceda9e5/62d461a3f2bc4c649bb9e8dcd7e36b6a [2020-07-20 13:34:32,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:34:32,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:34:32,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:32,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:34:32,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:34:32,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b78f35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32, skipping insertion in model container [2020-07-20 13:34:32,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:34:32,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:34:32,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:32,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:34:32,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:34:32,432 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:34:32,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32 WrapperNode [2020-07-20 13:34:32,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:34:32,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:34:32,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:34:32,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:34:32,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (1/1) ... [2020-07-20 13:34:32,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:34:32,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:34:32,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:34:32,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:34:32,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (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 [2020-07-20 13:34:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:34:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:34:32,703 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 13:34:32,703 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 13:34:32,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:34:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:34:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:34:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 13:34:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 13:34:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:34:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:34:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:34:32,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:34:32,948 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:34:32,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:32 BoogieIcfgContainer [2020-07-20 13:34:32,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:34:32,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:34:32,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:34:32,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:34:32,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:34:32" (1/3) ... [2020-07-20 13:34:32,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4716f7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:32, skipping insertion in model container [2020-07-20 13:34:32,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:32" (2/3) ... [2020-07-20 13:34:32,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4716f7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:32, skipping insertion in model container [2020-07-20 13:34:32,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:32" (3/3) ... [2020-07-20 13:34:32,977 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-20 13:34:32,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:34:33,002 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:34:33,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:34:33,052 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:34:33,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:34:33,053 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:34:33,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:34:33,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:34:33,053 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:34:33,053 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:34:33,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:34:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 13:34:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:34:33,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:33,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:33,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 13:34:33,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:33,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782831044] [2020-07-20 13:34:33,108 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 [2020-07-20 13:34:33,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:33,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:33,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:33,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:33,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782831044] [2020-07-20 13:34:33,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:33,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:33,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536240284] [2020-07-20 13:34:33,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:33,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:33,444 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 13:34:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:33,607 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 13:34:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:33,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:34:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:33,626 INFO L225 Difference]: With dead ends: 44 [2020-07-20 13:34:33,626 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:34:33,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:34:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:34:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:34:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:33,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 13:34:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:33,692 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:33,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:34:33,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:33,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:33,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:33,904 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 13:34:33,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:33,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135471875] [2020-07-20 13:34:33,908 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 [2020-07-20 13:34:33,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:34:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:34:34,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:34:34,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135471875] [2020-07-20 13:34:34,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:34:34,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:34:34,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27592758] [2020-07-20 13:34:34,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:34:34,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:34:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:34:34,010 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 13:34:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:34,102 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 13:34:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:34:34,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:34:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:34,105 INFO L225 Difference]: With dead ends: 36 [2020-07-20 13:34:34,105 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:34:34,107 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 [2020-07-20 13:34:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:34:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:34:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:34:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:34:34,119 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 13:34:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:34,120 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:34:34,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:34:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:34:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:34:34,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:34,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:34,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:34,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 13:34:34,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:34,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033029355] [2020-07-20 13:34:34,338 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 [2020-07-20 13:34:34,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:34,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:34,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:34,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:34,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033029355] [2020-07-20 13:34:34,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:34,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:34,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332394591] [2020-07-20 13:34:34,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:34,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:34,778 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 13:34:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:35,010 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 13:34:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:35,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 13:34:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:35,015 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:34:35,017 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 13:34:35,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 13:34:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 13:34:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:35,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 13:34:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:35,060 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:35,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:34:35,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:35,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:35,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:35,281 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 13:34:35,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:35,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358890070] [2020-07-20 13:34:35,283 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 [2020-07-20 13:34:35,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:35,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:35,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:35,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:35,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:35,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:34:35,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358890070] [2020-07-20 13:34:35,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:35,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:34:35,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867685884] [2020-07-20 13:34:35,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:34:35,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:34:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:34:35,548 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 13:34:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:35,671 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 13:34:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:35,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 13:34:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:35,674 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:34:35,675 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:34:35,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:34:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 13:34:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:34:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:34:35,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 13:34:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:35,693 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:34:35,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:34:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:34:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:34:35,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:35,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:35,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:35,898 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 13:34:35,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:35,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151093566] [2020-07-20 13:34:35,899 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 [2020-07-20 13:34:35,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:34:36,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:36,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:36,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151093566] [2020-07-20 13:34:36,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:36,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:34:36,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886924243] [2020-07-20 13:34:36,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:34:36,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:34:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:34:36,415 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 13:34:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:36,598 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 13:34:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:36,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 13:34:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:36,602 INFO L225 Difference]: With dead ends: 51 [2020-07-20 13:34:36,602 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:34:36,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:34:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 13:34:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:36,614 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 13:34:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:36,615 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:36,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:34:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:34:36,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:36,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:36,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:36,831 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 13:34:36,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:36,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689755423] [2020-07-20 13:34:36,833 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 [2020-07-20 13:34:36,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:34:36,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:37,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:34:37,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689755423] [2020-07-20 13:34:37,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:37,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:37,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066958148] [2020-07-20 13:34:37,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:37,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:37,242 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-20 13:34:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:37,425 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 13:34:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:37,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 13:34:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:37,427 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:34:37,428 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 13:34:37,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 13:34:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 13:34:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:34:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:34:37,440 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 13:34:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:37,440 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:34:37,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:34:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:34:37,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:37,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:37,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:37,659 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:37,660 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 13:34:37,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:37,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636011597] [2020-07-20 13:34:37,661 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 [2020-07-20 13:34:37,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:37,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:37,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 13:34:37,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:38,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:38,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:38,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:38,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:34:38,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636011597] [2020-07-20 13:34:38,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:38,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:38,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598356144] [2020-07-20 13:34:38,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:38,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:38,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:38,404 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-20 13:34:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:38,670 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 13:34:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:38,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-20 13:34:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:38,674 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:34:38,674 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:34:38,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:34:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 13:34:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:34:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:34:38,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 13:34:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:38,689 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:34:38,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:34:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:34:38,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:38,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:38,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:38,902 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 13:34:38,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:38,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890852568] [2020-07-20 13:34:38,904 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 [2020-07-20 13:34:38,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 13:34:39,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:39,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:39,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:39,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:39,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 13:34:39,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890852568] [2020-07-20 13:34:39,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:39,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:39,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16466040] [2020-07-20 13:34:39,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:39,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:39,431 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-20 13:34:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:39,640 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-20 13:34:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:39,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-20 13:34:39,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:39,643 INFO L225 Difference]: With dead ends: 69 [2020-07-20 13:34:39,643 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 13:34:39,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 13:34:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-20 13:34:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 13:34:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-20 13:34:39,658 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-20 13:34:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:39,659 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-20 13:34:39,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-20 13:34:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 13:34:39,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:39,662 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:39,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:39,868 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-20 13:34:39,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:39,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673645020] [2020-07-20 13:34:39,870 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 [2020-07-20 13:34:39,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:34:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 13:34:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:40,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:40,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 13:34:40,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673645020] [2020-07-20 13:34:40,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:40,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 13:34:40,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276768325] [2020-07-20 13:34:40,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:34:40,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:34:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:34:40,202 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-20 13:34:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:40,356 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-20 13:34:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:34:40,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-20 13:34:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:40,359 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:34:40,359 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:34:40,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:34:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-20 13:34:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 13:34:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-20 13:34:40,373 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-20 13:34:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:40,373 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-20 13:34:40,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:34:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-20 13:34:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 13:34:40,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:40,376 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:40,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:40,593 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-20 13:34:40,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:40,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825307210] [2020-07-20 13:34:40,595 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 [2020-07-20 13:34:40,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:40,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 13:34:40,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:40,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:41,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:41,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 13:34:41,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825307210] [2020-07-20 13:34:41,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:41,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:41,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531234590] [2020-07-20 13:34:41,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:41,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:41,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:41,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:41,123 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-20 13:34:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:41,258 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-20 13:34:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:41,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-20 13:34:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:41,261 INFO L225 Difference]: With dead ends: 66 [2020-07-20 13:34:41,261 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:34:41,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:34:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-20 13:34:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 13:34:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-20 13:34:41,273 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-20 13:34:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:41,274 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-20 13:34:41,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-20 13:34:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 13:34:41,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:41,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:41,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:41,491 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-20 13:34:41,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:41,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419305137] [2020-07-20 13:34:41,492 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 [2020-07-20 13:34:41,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 13:34:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 13:34:41,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 13:34:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419305137] [2020-07-20 13:34:42,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:42,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-20 13:34:42,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332228701] [2020-07-20 13:34:42,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:34:42,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:34:42,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:34:42,246 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-20 13:34:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:42,466 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-20 13:34:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 13:34:42,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-20 13:34:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:42,469 INFO L225 Difference]: With dead ends: 94 [2020-07-20 13:34:42,470 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 13:34:42,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:34:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 13:34:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-20 13:34:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 13:34:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-20 13:34:42,490 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-20 13:34:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:42,491 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-20 13:34:42,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:34:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-20 13:34:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 13:34:42,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:42,494 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:42,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:42,708 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-20 13:34:42,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:42,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13200443] [2020-07-20 13:34:42,710 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 [2020-07-20 13:34:42,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 13:34:42,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:43,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 13:34:43,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13200443] [2020-07-20 13:34:43,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:43,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468303731] [2020-07-20 13:34:43,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:43,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:43,481 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-20 13:34:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:43,662 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-20 13:34:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:43,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 13:34:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:43,670 INFO L225 Difference]: With dead ends: 100 [2020-07-20 13:34:43,670 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 13:34:43,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 13:34:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-20 13:34:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 13:34:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-20 13:34:43,709 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-20 13:34:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:43,709 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-20 13:34:43,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-20 13:34:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 13:34:43,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:43,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:43,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:43,929 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-20 13:34:43,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:43,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510847899] [2020-07-20 13:34:43,931 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 [2020-07-20 13:34:43,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:43,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:43,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:34:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 13:34:44,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:44,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-20 13:34:44,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510847899] [2020-07-20 13:34:44,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:44,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 13:34:44,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218683610] [2020-07-20 13:34:44,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:34:44,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:34:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:34:44,405 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-20 13:34:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:44,563 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-20 13:34:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:34:44,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-20 13:34:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:44,566 INFO L225 Difference]: With dead ends: 100 [2020-07-20 13:34:44,566 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 13:34:44,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:34:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 13:34:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-20 13:34:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 13:34:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-20 13:34:44,605 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-20 13:34:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:44,605 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-20 13:34:44,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:34:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-20 13:34:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 13:34:44,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:44,608 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:44,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:44,824 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-20 13:34:44,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:44,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541636745] [2020-07-20 13:34:44,826 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 [2020-07-20 13:34:44,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:34:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:34:44,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-20 13:34:44,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:45,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 13:34:45,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541636745] [2020-07-20 13:34:45,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:45,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 13:34:45,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754554392] [2020-07-20 13:34:45,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:45,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:45,444 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-20 13:34:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:45,664 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-20 13:34:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:45,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-20 13:34:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:45,667 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:34:45,668 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:34:45,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:34:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:34:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-20 13:34:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 13:34:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-20 13:34:45,684 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-20 13:34:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:45,685 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-20 13:34:45,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-20 13:34:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 13:34:45,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:45,687 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:45,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:45,902 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-20 13:34:45,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:45,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964777531] [2020-07-20 13:34:45,903 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 [2020-07-20 13:34:45,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:45,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:45,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:34:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 13:34:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:46,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 13:34:46,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964777531] [2020-07-20 13:34:46,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:46,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 13:34:46,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471712883] [2020-07-20 13:34:46,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:46,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:46,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:46,522 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-20 13:34:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:46,725 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-20 13:34:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:46,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-20 13:34:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:46,727 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:34:46,727 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 13:34:46,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:34:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 13:34:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 13:34:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 13:34:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-20 13:34:46,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-20 13:34:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:46,748 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-20 13:34:46,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-20 13:34:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 13:34:46,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:46,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:46,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:46,969 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-20 13:34:46,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:46,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993238344] [2020-07-20 13:34:46,971 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 [2020-07-20 13:34:47,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:47,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:47,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:34:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-20 13:34:47,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:47,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 13:34:47,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993238344] [2020-07-20 13:34:47,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:47,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-20 13:34:47,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278849131] [2020-07-20 13:34:47,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:34:47,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:34:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:34:47,655 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-20 13:34:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:47,861 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-20 13:34:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:34:47,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-20 13:34:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:47,863 INFO L225 Difference]: With dead ends: 86 [2020-07-20 13:34:47,864 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 13:34:47,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:34:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 13:34:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 13:34:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 13:34:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 13:34:47,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-20 13:34:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:47,874 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 13:34:47,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:34:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 13:34:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 13:34:47,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:34:47,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:34:48,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:48,091 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:34:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:34:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-20 13:34:48,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:34:48,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354483475] [2020-07-20 13:34:48,093 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 [2020-07-20 13:34:48,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:34:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:34:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:34:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:34:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-20 13:34:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:34:48,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 13:34:48,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354483475] [2020-07-20 13:34:48,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:34:48,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 13:34:48,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708094200] [2020-07-20 13:34:48,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:34:48,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:34:48,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:34:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:34:48,892 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-20 13:34:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:34:49,084 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-20 13:34:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:34:49,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-20 13:34:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:34:49,086 INFO L225 Difference]: With dead ends: 89 [2020-07-20 13:34:49,086 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:34:49,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:34:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:34:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:34:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:34:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:34:49,089 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-20 13:34:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:34:49,089 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:34:49,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:34:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:34:49,089 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:34:49,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:34:49,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:34:50,333 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-20 13:34:50,664 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-20 13:34:50,668 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:34:50,669 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:34:50,669 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:34:50,669 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:34:50,669 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:34:50,669 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:34:50,669 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 13:34:50,670 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 13:34:50,671 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 13:34:50,671 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-20 13:34:50,671 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 13:34:50,671 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (and (= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (<= 4 |fibo2_#in~n|)) (<= |fibo2_#in~n| fibo2_~n)) [2020-07-20 13:34:50,671 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 13:34:50,671 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 13:34:50,671 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 13:34:50,672 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:34:50,672 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 13:34:50,672 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 13:34:50,672 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-20 13:34:50,672 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 13:34:50,672 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (= 2 |fibo1_#t~ret0|) .cse1) (and .cse1 (<= |fibo1_#in~n| 3)) (and (<= 5 |fibo1_#in~n|) .cse1)))) [2020-07-20 13:34:50,672 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:34:50,672 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 13:34:50,673 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 13:34:50,673 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 13:34:50,673 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 13:34:50,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:34:50 BoogieIcfgContainer [2020-07-20 13:34:50,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:34:50,681 INFO L168 Benchmark]: Toolchain (without parser) took 18645.41 ms. Allocated memory was 136.8 MB in the beginning and 351.3 MB in the end (delta: 214.4 MB). Free memory was 101.6 MB in the beginning and 128.0 MB in the end (delta: -26.5 MB). Peak memory consumption was 225.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,681 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.76 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,682 INFO L168 Benchmark]: Boogie Preprocessor took 42.06 ms. Allocated memory is still 136.8 MB. Free memory was 91.7 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,683 INFO L168 Benchmark]: RCFGBuilder took 477.37 ms. Allocated memory was 136.8 MB in the beginning and 204.5 MB in the end (delta: 67.6 MB). Free memory was 90.2 MB in the beginning and 170.1 MB in the end (delta: -79.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,683 INFO L168 Benchmark]: TraceAbstraction took 17719.07 ms. Allocated memory was 204.5 MB in the beginning and 351.3 MB in the end (delta: 146.8 MB). Free memory was 170.1 MB in the beginning and 128.0 MB in the end (delta: 42.0 MB). Peak memory consumption was 226.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:34:50,686 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 394.76 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.06 ms. Allocated memory is still 136.8 MB. Free memory was 91.7 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 477.37 ms. Allocated memory was 136.8 MB in the beginning and 204.5 MB in the end (delta: 67.6 MB). Free memory was 90.2 MB in the beginning and 170.1 MB in the end (delta: -79.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17719.07 ms. Allocated memory was 204.5 MB in the beginning and 351.3 MB in the end (delta: 146.8 MB). Free memory was 170.1 MB in the beginning and 128.0 MB in the end (delta: 42.0 MB). Peak memory consumption was 226.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.2s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 437 SDslu, 2582 SDs, 0 SdLazy, 2031 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 71 PreInvPairs, 292 NumberOfFragments, 92 HoareAnnotationTreeSize, 71 FomulaSimplifications, 103936 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 915 NumberOfCodeBlocks, 814 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 232328 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1894 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1524/2030 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...