/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:01,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:01,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:01,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:01,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:01,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:01,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:01,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:01,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:01,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:01,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:01,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:01,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:01,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:01,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:01,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:01,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:01,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:01,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:01,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:01,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:01,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:01,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:01,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:01,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:01,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:01,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:01,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:01,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:45:01,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:01,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:01,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:01,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:01,568 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:01,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:01,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:01,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:01,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:01,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:01,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:01,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:01,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:01,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:01,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:01,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:01,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:01,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:01,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:01,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:01,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:01,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:01,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:01,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:01,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:01,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:01,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:01,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:01,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:01,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:01,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:01,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:01,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:01,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:01,884 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:01,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 15:45:01,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e872704/a8e76acde5c840caa2dcd73bd0056c28/FLAG06531fae6 [2020-07-21 15:45:02,459 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:02,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 15:45:02,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e872704/a8e76acde5c840caa2dcd73bd0056c28/FLAG06531fae6 [2020-07-21 15:45:02,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e872704/a8e76acde5c840caa2dcd73bd0056c28 [2020-07-21 15:45:02,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:02,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:02,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:02,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:02,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:02,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:02" (1/1) ... [2020-07-21 15:45:02,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77350e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:02, skipping insertion in model container [2020-07-21 15:45:02,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:02" (1/1) ... [2020-07-21 15:45:02,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:02,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:03,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:03,041 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:03,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:03,075 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:03,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03 WrapperNode [2020-07-21 15:45:03,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:03,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:03,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:03,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:03,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... [2020-07-21 15:45:03,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:03,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:03,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:03,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:03,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 15:45:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 15:45:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:03,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:03,459 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:03,460 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:03,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:03 BoogieIcfgContainer [2020-07-21 15:45:03,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:03,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:03,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:03,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:03,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:02" (1/3) ... [2020-07-21 15:45:03,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b0b617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:03, skipping insertion in model container [2020-07-21 15:45:03,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:03" (2/3) ... [2020-07-21 15:45:03,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b0b617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:03, skipping insertion in model container [2020-07-21 15:45:03,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:03" (3/3) ... [2020-07-21 15:45:03,473 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-21 15:45:03,485 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:03,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:03,510 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:03,544 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:03,545 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:03,545 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:03,545 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:03,545 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:03,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:03,546 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:03,546 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 15:45:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:03,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:03,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:03,581 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 15:45:03,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:03,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974833801] [2020-07-21 15:45:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:03,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:03,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:03,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974833801] [2020-07-21 15:45:03,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:03,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:03,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740197784] [2020-07-21 15:45:03,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:03,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:03,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:03,804 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 15:45:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:03,973 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 15:45:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:03,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 15:45:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:03,985 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:45:03,986 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:45:03,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:45:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 15:45:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 15:45:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 15:45:04,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 15:45:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:04,046 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 15:45:04,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 15:45:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 15:45:04,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:04,050 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] [2020-07-21 15:45:04,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:04,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 15:45:04,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:04,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298763124] [2020-07-21 15:45:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:04,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:04,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:04,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 15:45:04,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:04,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:04,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:04,559 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 15:45:04,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298763124] [2020-07-21 15:45:04,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:04,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 15:45:04,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911440533] [2020-07-21 15:45:04,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:04,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:04,564 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 15:45:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:04,685 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-21 15:45:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:04,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 15:45:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:04,688 INFO L225 Difference]: With dead ends: 38 [2020-07-21 15:45:04,689 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 15:45:04,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 15:45:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 15:45:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 15:45:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-21 15:45:04,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-21 15:45:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:04,703 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-21 15:45:04,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-21 15:45:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 15:45:04,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:04,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:04,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:04,920 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-21 15:45:04,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:04,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45828026] [2020-07-21 15:45:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:04,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:04,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:05,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:05,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45828026] [2020-07-21 15:45:05,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:05,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 15:45:05,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122020706] [2020-07-21 15:45:05,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:05,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:05,123 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-21 15:45:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:05,256 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-21 15:45:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:05,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 15:45:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:05,261 INFO L225 Difference]: With dead ends: 87 [2020-07-21 15:45:05,261 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 15:45:05,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 15:45:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 15:45:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 15:45:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 15:45:05,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-21 15:45:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:05,288 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 15:45:05,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 15:45:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 15:45:05,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:05,303 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:05,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:05,503 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-21 15:45:05,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:05,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639566319] [2020-07-21 15:45:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:05,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:05,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:45:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 139 proven. 127 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-07-21 15:45:05,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:06,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 143 proven. 141 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-21 15:45:06,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639566319] [2020-07-21 15:45:06,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:06,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 15:45:06,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380704134] [2020-07-21 15:45:06,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:45:06,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:45:06,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:45:06,848 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 12 states. [2020-07-21 15:45:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:07,108 INFO L93 Difference]: Finished difference Result 128 states and 498 transitions. [2020-07-21 15:45:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:07,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-07-21 15:45:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:07,118 INFO L225 Difference]: With dead ends: 128 [2020-07-21 15:45:07,120 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 15:45:07,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:45:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 15:45:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 15:45:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 15:45:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-21 15:45:07,156 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 122 [2020-07-21 15:45:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:07,157 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-21 15:45:07,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:45:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-21 15:45:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 15:45:07,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:07,163 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:07,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,370 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 15:45:07,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915583867] [2020-07-21 15:45:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-21 15:45:07,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 15:45:09,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915583867] [2020-07-21 15:45:09,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:09,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 15:45:09,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172031252] [2020-07-21 15:45:09,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 15:45:09,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 15:45:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:45:09,311 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 24 states. [2020-07-21 15:45:09,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:09,669 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-07-21 15:45:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 15:45:09,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 15:45:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:09,674 INFO L225 Difference]: With dead ends: 97 [2020-07-21 15:45:09,674 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 15:45:09,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:45:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 15:45:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-21 15:45:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 15:45:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-21 15:45:09,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 82 [2020-07-21 15:45:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:09,700 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-21 15:45:09,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 15:45:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-21 15:45:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 15:45:09,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:09,705 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:09,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,906 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 3 times [2020-07-21 15:45:09,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:09,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614493834] [2020-07-21 15:45:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 15:45:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-21 15:45:10,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:11,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:11,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:11,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-21 15:45:14,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614493834] [2020-07-21 15:45:14,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:14,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 35 [2020-07-21 15:45:14,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147220397] [2020-07-21 15:45:14,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 15:45:14,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 15:45:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:45:14,667 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 35 states. [2020-07-21 15:45:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:15,867 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-07-21 15:45:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 15:45:15,868 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-07-21 15:45:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:15,871 INFO L225 Difference]: With dead ends: 126 [2020-07-21 15:45:15,871 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 15:45:15,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2020-07-21 15:45:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 15:45:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-21 15:45:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 15:45:15,885 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 147 [2020-07-21 15:45:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:15,886 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 15:45:15,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 15:45:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 15:45:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 15:45:15,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:15,889 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:16,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,105 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:16,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 4 times [2020-07-21 15:45:16,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:16,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532566693] [2020-07-21 15:45:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 15:45:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-21 15:45:16,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:17,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-21 15:45:18,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532566693] [2020-07-21 15:45:18,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:18,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 15:45:18,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123334287] [2020-07-21 15:45:18,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:45:18,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:18,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:45:18,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:18,441 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-07-21 15:45:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:18,992 INFO L93 Difference]: Finished difference Result 119 states and 153 transitions. [2020-07-21 15:45:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 15:45:18,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-07-21 15:45:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:18,995 INFO L225 Difference]: With dead ends: 119 [2020-07-21 15:45:18,995 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 15:45:18,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 15:45:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 15:45:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-21 15:45:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-21 15:45:19,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 147 [2020-07-21 15:45:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:19,021 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-21 15:45:19,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:45:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-21 15:45:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 15:45:19,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:19,025 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:19,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:19,240 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-21 15:45:19,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:19,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353247998] [2020-07-21 15:45:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:19,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:19,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 15:45:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-21 15:45:19,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:21,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:21,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:21,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:21,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-21 15:45:24,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353247998] [2020-07-21 15:45:24,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:24,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 15:45:24,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655013433] [2020-07-21 15:45:24,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:45:24,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:45:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:45:24,279 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 33 states. [2020-07-21 15:45:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:25,444 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-07-21 15:45:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 15:45:25,445 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 15:45:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:25,447 INFO L225 Difference]: With dead ends: 137 [2020-07-21 15:45:25,447 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 15:45:25,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 15:45:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 15:45:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-21 15:45:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 15:45:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-21 15:45:25,474 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-21 15:45:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:25,475 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-21 15:45:25,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:45:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-21 15:45:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 15:45:25,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:25,484 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:25,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:25,700 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-21 15:45:25,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:25,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134194533] [2020-07-21 15:45:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:25,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:25,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 15:45:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 15:45:26,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:27,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-21 15:45:31,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134194533] [2020-07-21 15:45:31,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:31,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 15:45:31,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578771607] [2020-07-21 15:45:31,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 15:45:31,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 15:45:31,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 15:45:31,285 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-21 15:45:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:32,481 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-21 15:45:32,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 15:45:32,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 15:45:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:32,484 INFO L225 Difference]: With dead ends: 152 [2020-07-21 15:45:32,485 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 15:45:32,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 15:45:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 15:45:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-21 15:45:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 15:45:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-21 15:45:32,498 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-21 15:45:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:32,499 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-21 15:45:32,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 15:45:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-21 15:45:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 15:45:32,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:32,502 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:32,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:32,716 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-21 15:45:32,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:32,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731386674] [2020-07-21 15:45:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:32,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:32,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-21 15:45:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-21 15:45:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-21 15:45:35,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731386674] [2020-07-21 15:45:35,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:35,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 15:45:35,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27866032] [2020-07-21 15:45:35,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 15:45:35,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 15:45:35,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:45:35,703 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-21 15:45:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:47,525 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-21 15:45:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-21 15:45:47,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 15:45:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:47,532 INFO L225 Difference]: With dead ends: 323 [2020-07-21 15:45:47,532 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 15:45:47,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 15:45:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 15:45:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-21 15:45:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 15:45:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-21 15:45:47,559 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-21 15:45:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:47,560 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-21 15:45:47,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 15:45:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-21 15:45:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 15:45:47,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:47,564 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:47,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:47,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:47,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 8 times [2020-07-21 15:45:47,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:47,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282040626] [2020-07-21 15:45:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:48,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 15:45:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-21 15:45:48,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:51,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:51,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:51,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:51,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-07-21 15:45:55,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282040626] [2020-07-21 15:45:55,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:55,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-21 15:45:55,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920366783] [2020-07-21 15:45:55,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 15:45:55,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 15:45:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 15:45:55,838 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-21 15:45:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:57,426 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-21 15:45:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 15:45:57,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-21 15:45:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:57,435 INFO L225 Difference]: With dead ends: 238 [2020-07-21 15:45:57,436 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 15:45:57,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 15:45:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 15:45:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-21 15:45:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 15:45:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-21 15:45:57,467 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-21 15:45:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:57,471 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-21 15:45:57,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 15:45:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-21 15:45:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-21 15:45:57,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:57,477 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:57,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:57,693 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 9 times [2020-07-21 15:45:57,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:57,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959586718] [2020-07-21 15:45:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:58,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 15:45:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-21 15:45:58,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:00,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2020-07-21 15:46:02,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959586718] [2020-07-21 15:46:02,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:02,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-21 15:46:02,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412523485] [2020-07-21 15:46:02,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:46:02,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:02,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:46:02,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:46:02,076 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-21 15:46:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:02,743 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-21 15:46:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 15:46:02,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-21 15:46:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:02,746 INFO L225 Difference]: With dead ends: 172 [2020-07-21 15:46:02,746 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 15:46:02,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 380 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 15:46:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 15:46:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 15:46:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 15:46:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-21 15:46:02,762 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-21 15:46:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:02,762 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-21 15:46:02,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:46:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-21 15:46:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-21 15:46:02,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:02,768 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:02,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:02,982 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 10 times [2020-07-21 15:46:02,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:02,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777272522] [2020-07-21 15:46:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:03,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:46:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-21 15:46:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:04,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2020-07-21 15:46:05,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777272522] [2020-07-21 15:46:05,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:05,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 15:46:05,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612696788] [2020-07-21 15:46:05,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:46:05,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:46:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:46:05,032 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-21 15:46:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:05,203 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-21 15:46:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:46:05,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-21 15:46:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:05,205 INFO L225 Difference]: With dead ends: 85 [2020-07-21 15:46:05,205 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:46:05,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:46:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:46:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:46:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:46:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:46:05,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-21 15:46:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:05,208 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:46:05,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:46:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:46:05,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:46:05,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:05,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:46:06,485 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-07-21 15:46:06,993 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 78 [2020-07-21 15:46:11,629 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 10 [2020-07-21 15:46:15,621 WARN L193 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 320 DAG size of output: 59 [2020-07-21 15:46:15,916 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 12 [2020-07-21 15:46:16,076 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-21 15:46:16,080 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:46:16,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:46:16,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:46:16,081 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:46:16,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:46:16,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:46:16,081 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:46:16,082 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 15:46:16,082 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-21 15:46:16,082 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 15:46:16,082 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= 0 |ackermann_#in~n|) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-21 15:46:16,083 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse11 (<= |ackermann_#in~m| ackermann_~m)) (.cse13 (<= |ackermann_#in~n| ackermann_~n)) (.cse12 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse4 (and .cse11 (<= |ackermann_#in~m| 0) .cse13 (<= 0 |ackermann_#in~m|) .cse12)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse5 (<= 2 |ackermann_#in~m|))) (and (let ((.cse2 (<= 3 |ackermann_#in~n|)) (.cse3 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 2 |ackermann_#in~n|)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse10 (<= |ackermann_#t~ret1| 3)) (.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse7 (< |ackermann_#in~n| 2)) (.cse8 (<= 1 |ackermann_#in~n|))) (or (<= 3 |ackermann_#in~m|) (and .cse0 .cse1 .cse2 (<= |ackermann_#in~n| 3) (= 4 |ackermann_#t~ret1|)) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 (= 5 |ackermann_#t~ret1|)) (and (<= 6 |ackermann_#in~n|) .cse0 .cse3) .cse4 (and .cse5 .cse0 .cse3 .cse2) (and .cse5 (<= |ackermann_#t~ret1| 5) .cse0 .cse3 .cse6) (and .cse0 .cse7 .cse1 (= 2 |ackermann_#t~ret1|) .cse8) (and .cse9 .cse10 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2)) (and .cse0 (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|)) (and .cse9 .cse5 .cse10 .cse0 .cse7 .cse8))) (or .cse4 (and .cse11 .cse1 .cse12 (<= 1 |ackermann_#in~m|)) (and .cse11 .cse5 .cse13 .cse12))))) [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:46:16,083 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 15:46:16,084 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 15:46:16,084 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 15:46:16,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:46:16 BoogieIcfgContainer [2020-07-21 15:46:16,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:46:16,097 INFO L168 Benchmark]: Toolchain (without parser) took 73272.53 ms. Allocated memory was 142.6 MB in the beginning and 682.1 MB in the end (delta: 539.5 MB). Free memory was 100.2 MB in the beginning and 497.0 MB in the end (delta: -396.9 MB). Peak memory consumption was 568.6 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,109 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.69 ms. Allocated memory is still 142.6 MB. Free memory was 99.7 MB in the beginning and 90.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,111 INFO L168 Benchmark]: Boogie Preprocessor took 120.61 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,118 INFO L168 Benchmark]: RCFGBuilder took 267.19 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,119 INFO L168 Benchmark]: TraceAbstraction took 72627.82 ms. Allocated memory was 200.3 MB in the beginning and 682.1 MB in the end (delta: 481.8 MB). Free memory was 165.6 MB in the beginning and 497.0 MB in the end (delta: -331.5 MB). Peak memory consumption was 576.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:16,122 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.69 ms. Allocated memory is still 142.6 MB. Free memory was 99.7 MB in the beginning and 90.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.61 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.19 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72627.82 ms. Allocated memory was 200.3 MB in the beginning and 682.1 MB in the end (delta: 481.8 MB). Free memory was 165.6 MB in the beginning and 497.0 MB in the end (delta: -331.5 MB). Peak memory consumption was 576.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 61.8s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 411 SDtfs, 614 SDslu, 2588 SDs, 0 SdLazy, 9333 SolverSat, 1896 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 3096 SyntacticMatches, 182 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11469 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=10, 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, 13 MinimizatonAttempts, 172 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 645 PreInvPairs, 6196 NumberOfFragments, 231 HoareAnnotationTreeSize, 645 FomulaSimplifications, 1005512 FormulaSimplificationTreeSizeReduction, 5.8s HoareSimplificationTime, 9 FomulaSimplificationsInter, 160786 FormulaSimplificationTreeSizeReductionInter, 4.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 36.8s InterpolantComputationTime, 1778 NumberOfCodeBlocks, 1699 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 3516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1162704 SizeOfPredicates, 105 NumberOfNonLiveVariables, 5113 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26232/32304 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...