/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 2 -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 [2020-07-21 13:16:30,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:16:30,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:16:30,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:16:30,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:16:30,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:16:30,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:16:30,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:16:30,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:16:30,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:16:30,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:16:30,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:16:30,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:16:30,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:16:30,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:16:30,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:16:30,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:16:30,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:16:30,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:16:30,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:16:30,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:16:30,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:16:30,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:16:30,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:16:30,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:16:30,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:16:30,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:16:30,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:16:30,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:16:30,476 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:16:30,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:16:30,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:16:30,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:16:30,482 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:16:30,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:16:30,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:16:30,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:16:30,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:16:30,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:16:30,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:16:30,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:16:30,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:16:30,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:16:30,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:16:30,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:16:30,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:16:30,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:16:30,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:16:30,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:16:30,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:16:30,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:16:30,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:16:30,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:16:30,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:16:30,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:16:30,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:30,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:16:30,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:16:30,487 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 -> 2 [2020-07-21 13:16:30,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:16:30,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:16:30,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:16:30,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:16:30,828 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:16:30,829 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 13:16:30,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce4848d7/5cb85c2531714dae885c9d0bcfe57898/FLAG0139848a3 [2020-07-21 13:16:31,372 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:16:31,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 13:16:31,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce4848d7/5cb85c2531714dae885c9d0bcfe57898/FLAG0139848a3 [2020-07-21 13:16:31,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce4848d7/5cb85c2531714dae885c9d0bcfe57898 [2020-07-21 13:16:31,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:16:31,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:16:31,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:16:31,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:16:31,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:16:31,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:16:31" (1/1) ... [2020-07-21 13:16:31,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c785c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:31, skipping insertion in model container [2020-07-21 13:16:31,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:16:31" (1/1) ... [2020-07-21 13:16:31,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:16:31,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:16:31,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:16:31,978 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:16:31,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:16:32,011 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:16:32,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32 WrapperNode [2020-07-21 13:16:32,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:16:32,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:16:32,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:16:32,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:16:32,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (1/1) ... [2020-07-21 13:16:32,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:16:32,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:16:32,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:16:32,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:16:32,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (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 [2020-07-21 13:16:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:16:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:16:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 13:16:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 13:16:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:16:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:16:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:16:32,440 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:16:32,441 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:16:32,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:16:32 BoogieIcfgContainer [2020-07-21 13:16:32,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:16:32,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:16:32,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:16:32,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:16:32,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:16:31" (1/3) ... [2020-07-21 13:16:32,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75554563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:16:32, skipping insertion in model container [2020-07-21 13:16:32,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:16:32" (2/3) ... [2020-07-21 13:16:32,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75554563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:16:32, skipping insertion in model container [2020-07-21 13:16:32,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:16:32" (3/3) ... [2020-07-21 13:16:32,466 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-21 13:16:32,481 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:16:32,490 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:16:32,524 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:16:32,557 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:16:32,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:16:32,557 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:16:32,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:16:32,557 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:16:32,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:16:32,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:16:32,558 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:16:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 13:16:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:16:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:32,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:16:32,579 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 13:16:32,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:32,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447952083] [2020-07-21 13:16:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:32,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:32,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:16:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:16:32,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:16:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447952083] [2020-07-21 13:16:32,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:16:32,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:16:32,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856479507] [2020-07-21 13:16:32,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:16:32,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:16:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:16:32,780 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 13:16:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:32,897 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 13:16:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:16:32,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:16:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:32,909 INFO L225 Difference]: With dead ends: 44 [2020-07-21 13:16:32,909 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 13:16:32,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:16:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 13:16:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 13:16:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:16:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:16:32,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 13:16:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:32,964 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:16:32,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:16:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:16:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:16:32,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:32,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:16:33,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:33,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:33,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 13:16:33,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:33,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126959877] [2020-07-21 13:16:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:33,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:16:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:16:33,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:16:33,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126959877] [2020-07-21 13:16:33,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:16:33,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:16:33,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639704062] [2020-07-21 13:16:33,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:16:33,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:33,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:16:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:16:33,276 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 13:16:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:33,364 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 13:16:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:16:33,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:16:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:33,368 INFO L225 Difference]: With dead ends: 36 [2020-07-21 13:16:33,368 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 13:16:33,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:16:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 13:16:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 13:16:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 13:16:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 13:16:33,385 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 13:16:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:33,385 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 13:16:33,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:16:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 13:16:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:16:33,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:33,387 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] [2020-07-21 13:16:33,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:33,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 13:16:33,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:33,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652197279] [2020-07-21 13:16:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:33,644 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:33,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:16:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:16:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:33,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:33,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:16:33,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652197279] [2020-07-21 13:16:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:16:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025602593] [2020-07-21 13:16:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:16:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:16:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:16:33,982 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 13:16:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:34,104 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 13:16:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:16:34,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 13:16:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:34,107 INFO L225 Difference]: With dead ends: 41 [2020-07-21 13:16:34,107 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 13:16:34,108 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 [2020-07-21 13:16:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 13:16:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 13:16:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:16:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:16:34,129 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 13:16:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:34,130 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:16:34,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:16:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:16:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:16:34,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:34,136 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] [2020-07-21 13:16:34,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:34,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 13:16:34,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:34,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072611862] [2020-07-21 13:16:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:34,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:16:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:16:34,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:34,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:34,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 13:16:34,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072611862] [2020-07-21 13:16:34,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:34,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 13:16:34,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3549898] [2020-07-21 13:16:34,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 13:16:34,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 13:16:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 13:16:34,662 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 13:16:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:34,801 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 13:16:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:16:34,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 13:16:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:34,806 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:16:34,806 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:16:34,807 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 [2020-07-21 13:16:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:16:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 13:16:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:16:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 13:16:34,824 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 13:16:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:34,825 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 13:16:34,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 13:16:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 13:16:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:16:34,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:34,833 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] [2020-07-21 13:16:35,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:35,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 13:16:35,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:35,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535506736] [2020-07-21 13:16:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:35,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:16:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 13:16:35,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:35,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:35,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:35,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:16:35,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535506736] [2020-07-21 13:16:35,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:35,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 13:16:35,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631136479] [2020-07-21 13:16:35,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 13:16:35,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 13:16:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 13:16:35,514 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 13:16:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:35,671 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 13:16:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:16:35,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 13:16:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:35,674 INFO L225 Difference]: With dead ends: 51 [2020-07-21 13:16:35,674 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 13:16:35,675 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 [2020-07-21 13:16:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 13:16:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 13:16:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:16:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:16:35,686 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 13:16:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:35,686 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:16:35,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 13:16:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:16:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 13:16:35,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:35,689 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] [2020-07-21 13:16:35,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:35,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 13:16:35,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:35,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078261912] [2020-07-21 13:16:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:35,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:35,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:16:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:16:35,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:36,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:36,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:36,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:16:36,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078261912] [2020-07-21 13:16:36,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:36,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:16:36,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443969594] [2020-07-21 13:16:36,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:16:36,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:16:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:16:36,326 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-21 13:16:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:36,478 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 13:16:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:16:36,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 13:16:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:36,481 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:16:36,482 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:16:36,482 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 [2020-07-21 13:16:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:16:36,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 13:16:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:16:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 13:16:36,494 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 13:16:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:36,494 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 13:16:36,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:16:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 13:16:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 13:16:36,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:36,496 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] [2020-07-21 13:16:36,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:36,710 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 13:16:36,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:36,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444444876] [2020-07-21 13:16:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:36,759 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:16:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 13:16:36,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:37,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:37,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:37,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:37,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 13:16:37,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444444876] [2020-07-21 13:16:37,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:37,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:16:37,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954897913] [2020-07-21 13:16:37,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:16:37,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:16:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:16:37,394 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-21 13:16:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:37,589 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 13:16:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:16:37,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-21 13:16:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:37,593 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:16:37,593 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:16:37,594 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 [2020-07-21 13:16:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:16:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 13:16:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 13:16:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 13:16:37,609 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 13:16:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:37,610 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 13:16:37,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:16:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 13:16:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 13:16:37,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:37,612 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] [2020-07-21 13:16:37,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:37,821 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 13:16:37,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:37,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848412779] [2020-07-21 13:16:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:37,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:37,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:16:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 13:16:37,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:38,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 13:16:38,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848412779] [2020-07-21 13:16:38,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:38,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:16:38,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791519427] [2020-07-21 13:16:38,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:16:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:16:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:16:38,259 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-21 13:16:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:38,431 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-21 13:16:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:16:38,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-21 13:16:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:38,434 INFO L225 Difference]: With dead ends: 69 [2020-07-21 13:16:38,434 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 13:16:38,435 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 [2020-07-21 13:16:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 13:16:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-21 13:16:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 13:16:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-21 13:16:38,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-21 13:16:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:38,449 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-21 13:16:38,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:16:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-21 13:16:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 13:16:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:38,451 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] [2020-07-21 13:16:38,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:38,665 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-21 13:16:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628596074] [2020-07-21 13:16:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:38,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:38,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:16:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 13:16:38,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:38,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 13:16:38,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628596074] [2020-07-21 13:16:38,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:38,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 13:16:38,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633090952] [2020-07-21 13:16:38,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:16:38,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:16:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:16:38,957 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-21 13:16:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:39,093 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-21 13:16:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:16:39,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-21 13:16:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:39,095 INFO L225 Difference]: With dead ends: 61 [2020-07-21 13:16:39,095 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 13:16:39,097 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 [2020-07-21 13:16:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 13:16:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-21 13:16:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 13:16:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-21 13:16:39,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-21 13:16:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:39,117 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-21 13:16:39,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:16:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-21 13:16:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 13:16:39,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:39,119 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] [2020-07-21 13:16:39,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:39,332 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-21 13:16:39,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:39,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719731983] [2020-07-21 13:16:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:39,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:39,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:16:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 13:16:39,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:39,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:39,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:39,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 13:16:39,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719731983] [2020-07-21 13:16:39,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:39,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:16:39,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827788417] [2020-07-21 13:16:39,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:16:39,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:39,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:16:39,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:16:39,808 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-21 13:16:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:39,956 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-21 13:16:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:16:39,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-21 13:16:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:39,959 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:16:39,959 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 13:16:39,960 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 [2020-07-21 13:16:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 13:16:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-21 13:16:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 13:16:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 13:16:39,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-21 13:16:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:39,969 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 13:16:39,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:16:39,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 13:16:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 13:16:39,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:39,971 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] [2020-07-21 13:16:40,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:40,176 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-21 13:16:40,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:40,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085805941] [2020-07-21 13:16:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:40,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 13:16:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 13:16:40,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 13:16:40,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085805941] [2020-07-21 13:16:40,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:40,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-21 13:16:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277310625] [2020-07-21 13:16:40,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:16:40,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:16:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:16:40,845 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-21 13:16:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:41,068 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-21 13:16:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 13:16:41,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-21 13:16:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:41,072 INFO L225 Difference]: With dead ends: 94 [2020-07-21 13:16:41,072 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 13:16:41,073 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 [2020-07-21 13:16:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 13:16:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-21 13:16:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 13:16:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-21 13:16:41,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-21 13:16:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:41,107 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-21 13:16:41,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:16:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-21 13:16:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 13:16:41,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:41,114 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] [2020-07-21 13:16:41,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:41,316 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-21 13:16:41,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:41,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050542353] [2020-07-21 13:16:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:41,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:41,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:16:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 13:16:41,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:41,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 13:16:41,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050542353] [2020-07-21 13:16:41,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:41,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:16:41,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061481110] [2020-07-21 13:16:41,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:16:41,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:16:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:16:41,988 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-21 13:16:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:42,169 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-21 13:16:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:16:42,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 13:16:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:42,174 INFO L225 Difference]: With dead ends: 100 [2020-07-21 13:16:42,174 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 13:16:42,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:16:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 13:16:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 13:16:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 13:16:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 13:16:42,189 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-21 13:16:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:42,189 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 13:16:42,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:16:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 13:16:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 13:16:42,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:42,192 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] [2020-07-21 13:16:42,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:42,400 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-21 13:16:42,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:42,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591293556] [2020-07-21 13:16:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:42,453 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:16:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 13:16:42,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:42,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:42,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:42,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:42,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:42,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-21 13:16:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591293556] [2020-07-21 13:16:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:42,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 13:16:42,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045075242] [2020-07-21 13:16:42,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:16:42,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:16:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:16:42,822 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-21 13:16:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:42,976 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-21 13:16:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:16:42,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-21 13:16:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:42,979 INFO L225 Difference]: With dead ends: 100 [2020-07-21 13:16:42,979 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 13:16:42,980 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 [2020-07-21 13:16:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 13:16:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 13:16:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 13:16:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 13:16:42,993 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-21 13:16:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:42,994 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 13:16:42,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:16:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 13:16:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 13:16:42,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:42,996 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] [2020-07-21 13:16:43,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:43,212 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-21 13:16:43,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:43,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219805820] [2020-07-21 13:16:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:43,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:16:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 13:16:43,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:43,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:43,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:43,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:43,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 13:16:43,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219805820] [2020-07-21 13:16:43,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:43,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 13:16:43,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834822832] [2020-07-21 13:16:43,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:16:43,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:16:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:16:43,794 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-21 13:16:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:43,985 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-21 13:16:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:16:43,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 13:16:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:43,988 INFO L225 Difference]: With dead ends: 97 [2020-07-21 13:16:43,989 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 13:16:43,990 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 [2020-07-21 13:16:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 13:16:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-21 13:16:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 13:16:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-21 13:16:43,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-21 13:16:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:43,999 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-21 13:16:43,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:16:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-21 13:16:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 13:16:44,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:44,001 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] [2020-07-21 13:16:44,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:44,217 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-21 13:16:44,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:44,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077535188] [2020-07-21 13:16:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:44,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:16:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 13:16:44,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:44,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 13:16:44,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077535188] [2020-07-21 13:16:44,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:44,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 13:16:44,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128326417] [2020-07-21 13:16:44,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:16:44,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:16:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:16:44,822 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-21 13:16:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:45,019 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-21 13:16:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:16:45,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-21 13:16:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:45,021 INFO L225 Difference]: With dead ends: 97 [2020-07-21 13:16:45,022 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 13:16:45,026 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 [2020-07-21 13:16:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 13:16:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 13:16:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 13:16:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-21 13:16:45,041 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-21 13:16:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:45,041 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-21 13:16:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:16:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-21 13:16:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 13:16:45,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:45,045 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] [2020-07-21 13:16:45,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:45,258 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-21 13:16:45,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:45,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078346210] [2020-07-21 13:16:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:45,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 13:16:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 13:16:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:45,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:45,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:45,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:45,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 13:16:45,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078346210] [2020-07-21 13:16:45,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:45,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 13:16:45,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863369086] [2020-07-21 13:16:45,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:16:45,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:16:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:16:45,962 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-21 13:16:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:46,134 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-21 13:16:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:16:46,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 13:16:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:46,136 INFO L225 Difference]: With dead ends: 86 [2020-07-21 13:16:46,137 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 13:16:46,138 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 [2020-07-21 13:16:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 13:16:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 13:16:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 13:16:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 13:16:46,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-21 13:16:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:46,146 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 13:16:46,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:16:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 13:16:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 13:16:46,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:46,149 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] [2020-07-21 13:16:46,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:46,362 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 13:16:46,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:46,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063887913] [2020-07-21 13:16:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:46,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:46,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 13:16:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:16:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-21 13:16:46,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:46,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:47,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:47,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:47,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 13:16:47,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063887913] [2020-07-21 13:16:47,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:47,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 13:16:47,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794616878] [2020-07-21 13:16:47,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:16:47,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:16:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:16:47,219 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-21 13:16:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:47,409 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-21 13:16:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:16:47,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-21 13:16:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:47,411 INFO L225 Difference]: With dead ends: 89 [2020-07-21 13:16:47,411 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:16:47,412 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 [2020-07-21 13:16:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:16:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:16:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:16:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:16:47,413 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-21 13:16:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:47,413 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:16:47,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:16:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:16:47,414 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:16:47,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:47,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:16:48,481 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-21 13:16:48,832 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-21 13:16:48,837 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 13:16:48,837 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:16:48,837 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:16:48,837 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 13:16:48,837 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:16:48,838 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:16:48,838 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 13:16:48,838 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 13:16:48,838 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 13:16:48,838 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 13:16:48,838 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 13:16:48,839 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 13:16:48,839 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-21 13:16:48,839 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 13:16:48,839 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 13:16:48,839 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 13:16:48,839 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|)) [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 13:16:48,840 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)) [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 13:16:48,840 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 13:16:48,840 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 13:16:48,841 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)) [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 13:16:48,841 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)))) [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 13:16:48,841 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 13:16:48,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:16:48 BoogieIcfgContainer [2020-07-21 13:16:48,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:16:48,848 INFO L168 Benchmark]: Toolchain (without parser) took 17099.64 ms. Allocated memory was 147.8 MB in the beginning and 339.7 MB in the end (delta: 191.9 MB). Free memory was 106.1 MB in the beginning and 279.2 MB in the end (delta: -173.1 MB). Peak memory consumption was 200.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:16:48,848 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:16:48,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.70 ms. Allocated memory is still 147.8 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:16:48,850 INFO L168 Benchmark]: Boogie Preprocessor took 128.65 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 96.2 MB in the beginning and 182.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:16:48,850 INFO L168 Benchmark]: RCFGBuilder took 306.07 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 169.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:16:48,851 INFO L168 Benchmark]: TraceAbstraction took 16389.44 ms. Allocated memory was 203.9 MB in the beginning and 339.7 MB in the end (delta: 135.8 MB). Free memory was 168.8 MB in the beginning and 279.2 MB in the end (delta: -110.4 MB). Peak memory consumption was 207.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:16:48,854 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.70 ms. Allocated memory is still 147.8 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.65 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 96.2 MB in the beginning and 182.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.07 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 169.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16389.44 ms. Allocated memory was 203.9 MB in the beginning and 339.7 MB in the end (delta: 135.8 MB). Free memory was 168.8 MB in the beginning and 279.2 MB in the end (delta: -110.4 MB). Peak memory consumption was 207.4 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: 15.0s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 437 SDslu, 2582 SDs, 0 SdLazy, 2025 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.5s 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, 0.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 915 NumberOfCodeBlocks, 915 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 232328 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2051 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...