/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 NOT_INCREMENTALLY -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 10:40:32,477 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 10:40:32,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:32,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:32,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:32,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:32,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:32,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:32,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:32,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:32,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:32,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:32,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:32,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:32,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:32,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:32,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:32,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:32,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:32,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:32,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:32,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:32,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:32,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:32,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:32,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:32,533 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 10:40:32,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:32,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:32,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:32,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:32,549 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:32,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:32,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:32,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:32,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:32,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:32,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:32,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:32,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:32,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:32,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:32,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:32,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:32,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:32,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:32,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:32,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:32,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:32,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:32,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:32,554 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 -> NOT_INCREMENTALLY [2020-07-21 10:40:32,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:32,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:32,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:32,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:32,847 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:32,848 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 10:40:32,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4ace4e8/dc52a5df44b04a469889f9be3022d0d3/FLAGa1db512b8 [2020-07-21 10:40:33,397 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:33,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 10:40:33,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4ace4e8/dc52a5df44b04a469889f9be3022d0d3/FLAGa1db512b8 [2020-07-21 10:40:33,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4ace4e8/dc52a5df44b04a469889f9be3022d0d3 [2020-07-21 10:40:33,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:33,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:33,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:33,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:33,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:33,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:33" (1/1) ... [2020-07-21 10:40:33,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288eceee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:33, skipping insertion in model container [2020-07-21 10:40:33,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:33" (1/1) ... [2020-07-21 10:40:33,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:33,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:34,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:34,130 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:34,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:34,169 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:34,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34 WrapperNode [2020-07-21 10:40:34,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:34,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:34,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:34,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:34,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (1/1) ... [2020-07-21 10:40:34,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:34,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:34,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:34,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:34,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (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 10:40:34,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 10:40:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 10:40:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:34,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:34,632 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:34,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:34 BoogieIcfgContainer [2020-07-21 10:40:34,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:34,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:34,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:34,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:34,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:33" (1/3) ... [2020-07-21 10:40:34,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc0c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:34, skipping insertion in model container [2020-07-21 10:40:34,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:34" (2/3) ... [2020-07-21 10:40:34,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc0c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:34, skipping insertion in model container [2020-07-21 10:40:34,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:34" (3/3) ... [2020-07-21 10:40:34,645 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-21 10:40:34,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:34,664 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:34,679 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:34,728 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:34,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:34,728 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:34,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:34,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:34,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:34,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:34,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 10:40:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:40:34,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:34,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:34,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 10:40:34,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:34,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103065760] [2020-07-21 10:40:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:35,019 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 10:40:35,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:35,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103065760] [2020-07-21 10:40:35,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:35,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:40:35,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048172574] [2020-07-21 10:40:35,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:40:35,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:40:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:35,040 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 10:40:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:35,182 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 10:40:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:35,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 10:40:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:35,196 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:40:35,199 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:40:35,203 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 10:40:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:40:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 10:40:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 10:40:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 10:40:35,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 10:40:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:35,255 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 10:40:35,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:40:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 10:40:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 10:40:35,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:35,259 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 10:40:35,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:35,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 10:40:35,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:35,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750402810] [2020-07-21 10:40:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:35,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:35,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:35,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750402810] [2020-07-21 10:40:35,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:35,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 10:40:35,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968866805] [2020-07-21 10:40:35,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:35,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:35,662 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 10:40:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:35,804 INFO L93 Difference]: Finished difference Result 68 states and 118 transitions. [2020-07-21 10:40:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:35,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 10:40:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:35,809 INFO L225 Difference]: With dead ends: 68 [2020-07-21 10:40:35,809 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 10:40:35,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 10:40:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 10:40:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 10:40:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 10:40:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 69 transitions. [2020-07-21 10:40:35,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 69 transitions. Word has length 22 [2020-07-21 10:40:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:35,830 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 69 transitions. [2020-07-21 10:40:35,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 69 transitions. [2020-07-21 10:40:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 10:40:35,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:35,836 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:36,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:36,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:36,055 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 1 times [2020-07-21 10:40:36,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:36,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663972957] [2020-07-21 10:40:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:36,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 10:40:36,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:36,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:36,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:36,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:36,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 10:40:36,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663972957] [2020-07-21 10:40:36,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:36,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 10:40:36,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58997607] [2020-07-21 10:40:36,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:36,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:36,709 INFO L87 Difference]: Start difference. First operand 44 states and 69 transitions. Second operand 8 states. [2020-07-21 10:40:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:36,805 INFO L93 Difference]: Finished difference Result 61 states and 116 transitions. [2020-07-21 10:40:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:36,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-21 10:40:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:36,809 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:40:36,810 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:40:36,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:40:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 10:40:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 10:40:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 10:40:36,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 48 [2020-07-21 10:40:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:36,832 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 10:40:36,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 10:40:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 10:40:36,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:36,838 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 10:40:37,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:37,053 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:37,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:37,054 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 10:40:37,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:37,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347211120] [2020-07-21 10:40:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:37,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:37,253 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 10:40:37,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:39,002 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 10:40:39,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347211120] [2020-07-21 10:40:39,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:39,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 10:40:39,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320694324] [2020-07-21 10:40:39,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:40:39,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:40:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:40:39,005 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 24 states. [2020-07-21 10:40:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:39,871 INFO L93 Difference]: Finished difference Result 226 states and 903 transitions. [2020-07-21 10:40:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 10:40:39,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 10:40:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:39,899 INFO L225 Difference]: With dead ends: 226 [2020-07-21 10:40:39,900 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 10:40:39,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 10:40:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 10:40:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 95. [2020-07-21 10:40:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 10:40:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 275 transitions. [2020-07-21 10:40:40,006 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 275 transitions. Word has length 82 [2020-07-21 10:40:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:40,007 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 275 transitions. [2020-07-21 10:40:40,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:40:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 275 transitions. [2020-07-21 10:40:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:40:40,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:40,018 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:40,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,232 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1232135348, now seen corresponding path program 3 times [2020-07-21 10:40:40,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:40,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543261252] [2020-07-21 10:40:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:40:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-07-21 10:40:40,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:41,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 144 proven. 197 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-07-21 10:40:42,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543261252] [2020-07-21 10:40:42,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:42,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 22 [2020-07-21 10:40:42,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331525708] [2020-07-21 10:40:42,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:40:42,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:40:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:40:42,367 INFO L87 Difference]: Start difference. First operand 95 states and 275 transitions. Second operand 22 states. [2020-07-21 10:40:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:43,305 INFO L93 Difference]: Finished difference Result 256 states and 1032 transitions. [2020-07-21 10:40:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 10:40:43,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-07-21 10:40:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:43,312 INFO L225 Difference]: With dead ends: 256 [2020-07-21 10:40:43,312 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 10:40:43,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 10:40:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 10:40:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 95. [2020-07-21 10:40:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 10:40:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 251 transitions. [2020-07-21 10:40:43,341 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 251 transitions. Word has length 121 [2020-07-21 10:40:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:43,342 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 251 transitions. [2020-07-21 10:40:43,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:40:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 251 transitions. [2020-07-21 10:40:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-21 10:40:43,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:43,347 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 9, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:43,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:43,561 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1681770238, now seen corresponding path program 4 times [2020-07-21 10:40:43,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:43,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649111043] [2020-07-21 10:40:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:40:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 227 proven. 157 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2020-07-21 10:40:43,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:44,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 233 proven. 176 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2020-07-21 10:40:44,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649111043] [2020-07-21 10:40:44,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:44,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 10:40:44,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009367889] [2020-07-21 10:40:44,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:40:44,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:40:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:40:44,868 INFO L87 Difference]: Start difference. First operand 95 states and 251 transitions. Second operand 12 states. [2020-07-21 10:40:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:45,035 INFO L93 Difference]: Finished difference Result 184 states and 828 transitions. [2020-07-21 10:40:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:45,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 154 [2020-07-21 10:40:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:45,037 INFO L225 Difference]: With dead ends: 184 [2020-07-21 10:40:45,038 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 10:40:45,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 286 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 10:40:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 10:40:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 10:40:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:40:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-07-21 10:40:45,050 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 154 [2020-07-21 10:40:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:45,051 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-07-21 10:40:45,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:40:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-07-21 10:40:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-21 10:40:45,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:45,054 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:45,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:45,269 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 5 times [2020-07-21 10:40:45,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:45,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792170387] [2020-07-21 10:40:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:40:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-21 10:40:45,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:46,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:46,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-21 10:40:47,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792170387] [2020-07-21 10:40:47,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:47,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 10:40:47,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588037218] [2020-07-21 10:40:47,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:40:47,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:40:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:40:47,644 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 19 states. [2020-07-21 10:40:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:48,194 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2020-07-21 10:40:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 10:40:48,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-07-21 10:40:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:48,196 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:40:48,196 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 10:40:48,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 232 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 10:40:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 10:40:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-07-21 10:40:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:40:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-07-21 10:40:48,204 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 134 [2020-07-21 10:40:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:48,205 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-07-21 10:40:48,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:40:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-07-21 10:40:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 10:40:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:48,207 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 10:40:48,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:48,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-21 10:40:48,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:48,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480989260] [2020-07-21 10:40:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 10:40:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:48,783 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 10:40:48,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:50,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,588 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 10:40:53,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480989260] [2020-07-21 10:40:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:53,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 10:40:53,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245928494] [2020-07-21 10:40:53,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 10:40:53,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 10:40:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:40:53,591 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 33 states. [2020-07-21 10:40:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:54,835 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2020-07-21 10:40:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 10:40:54,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 10:40:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:54,838 INFO L225 Difference]: With dead ends: 132 [2020-07-21 10:40:54,838 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 10:40:54,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 10:40:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 10:40:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-21 10:40:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 10:40:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-21 10:40:54,855 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-21 10:40:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:54,856 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-21 10:40:54,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 10:40:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-21 10:40:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 10:40:54,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:54,862 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 10:40:55,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:55,077 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-21 10:40:55,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:55,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442840681] [2020-07-21 10:40:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:40:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-21 10:40:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:55,614 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 10:40:55,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:57,814 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 10:40:57,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442840681] [2020-07-21 10:40:57,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:57,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 10:40:57,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405505589] [2020-07-21 10:40:57,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 10:40:57,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 10:40:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:40:57,818 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 35 states. [2020-07-21 10:41:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:09,408 INFO L93 Difference]: Finished difference Result 343 states and 560 transitions. [2020-07-21 10:41:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-07-21 10:41:09,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 10:41:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:09,413 INFO L225 Difference]: With dead ends: 343 [2020-07-21 10:41:09,414 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 10:41:09,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6977 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2270, Invalid=21910, Unknown=0, NotChecked=0, Total=24180 [2020-07-21 10:41:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 10:41:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 94. [2020-07-21 10:41:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 10:41:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2020-07-21 10:41:09,438 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 186 [2020-07-21 10:41:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:09,439 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2020-07-21 10:41:09,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 10:41:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2020-07-21 10:41:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 10:41:09,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:09,442 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 10:41:09,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:09,657 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-07-21 10:41:09,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:09,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077873471] [2020-07-21 10:41:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:41:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:09,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 10:41:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:10,106 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 10:41:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:12,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:12,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:12,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:12,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:12,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:12,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:15,558 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 10:41:15,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077873471] [2020-07-21 10:41:15,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:15,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 10:41:15,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041929103] [2020-07-21 10:41:15,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 10:41:15,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:15,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 10:41:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:41:15,561 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand 30 states. [2020-07-21 10:41:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:16,680 INFO L93 Difference]: Finished difference Result 210 states and 299 transitions. [2020-07-21 10:41:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 10:41:16,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 10:41:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:16,684 INFO L225 Difference]: With dead ends: 210 [2020-07-21 10:41:16,684 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 10:41:16,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-21 10:41:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 10:41:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2020-07-21 10:41:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 10:41:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-21 10:41:16,696 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 173 [2020-07-21 10:41:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:16,697 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-21 10:41:16,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 10:41:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-21 10:41:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 10:41:16,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:16,700 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 10:41:16,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:16,916 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 9 times [2020-07-21 10:41:16,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:16,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941016076] [2020-07-21 10:41:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:41:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 10:41:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:17,486 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 10:41:17,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:20,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:20,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:20,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:21,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:24,933 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 10:41:24,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941016076] [2020-07-21 10:41:24,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:24,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-21 10:41:24,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144196282] [2020-07-21 10:41:24,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 10:41:24,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:24,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 10:41:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:41:24,936 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-21 10:41:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:26,579 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-21 10:41:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 10:41:26,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-21 10:41:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:26,583 INFO L225 Difference]: With dead ends: 238 [2020-07-21 10:41:26,583 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 10:41:26,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 10:41:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 10:41:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-21 10:41:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 10:41:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-21 10:41:26,595 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-21 10:41:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:26,596 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-21 10:41:26,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 10:41:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-21 10:41:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-21 10:41:26,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:26,599 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 10:41:26,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:26,813 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 10 times [2020-07-21 10:41:26,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:26,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608915987] [2020-07-21 10:41:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:41:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 10:41:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:27,347 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 10:41:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:29,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:29,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:29,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:29,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:29,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:30,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:30,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:31,000 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 10:41:31,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608915987] [2020-07-21 10:41:31,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:31,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-21 10:41:31,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914354256] [2020-07-21 10:41:31,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:41:31,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:41:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:41:31,002 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-21 10:41:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:31,666 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-21 10:41:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 10:41:31,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-21 10:41:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:31,669 INFO L225 Difference]: With dead ends: 172 [2020-07-21 10:41:31,669 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:41:31,671 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 10:41:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:41:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 10:41:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 10:41:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-21 10:41:31,699 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-21 10:41:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:31,699 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-21 10:41:31,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:41:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-21 10:41:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-21 10:41:31,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:31,704 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 10:41:31,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:31,917 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 11 times [2020-07-21 10:41:31,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:31,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017193654] [2020-07-21 10:41:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:41:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:41:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:32,378 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 10:41:32,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:33,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:33,853 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 10:41:33,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017193654] [2020-07-21 10:41:33,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:33,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 10:41:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114108302] [2020-07-21 10:41:33,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:41:33,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:41:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:41:33,855 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-21 10:41:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:34,021 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-21 10:41:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:41:34,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-21 10:41:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:34,023 INFO L225 Difference]: With dead ends: 85 [2020-07-21 10:41:34,023 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:41:34,025 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 10:41:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:41:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:41:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:41:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:41:34,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-21 10:41:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:34,027 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:41:34,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:41:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:41:34,027 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:41:34,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:34,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:41:34,948 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-07-21 10:41:35,125 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-07-21 10:41:35,249 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-07-21 10:41:35,506 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-07-21 10:41:35,794 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 176 [2020-07-21 10:41:36,610 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 175 [2020-07-21 10:41:37,127 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 175 [2020-07-21 10:41:37,748 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 178 [2020-07-21 10:41:38,519 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 175 [2020-07-21 10:41:38,816 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 154 [2020-07-21 10:41:39,185 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 186 [2020-07-21 10:41:39,522 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 179 [2020-07-21 10:41:42,328 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 176 [2020-07-21 10:41:43,298 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 10 [2020-07-21 10:41:50,121 WARN L193 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 405 DAG size of output: 68 [2020-07-21 10:41:50,370 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 13 [2020-07-21 10:41:50,519 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-21 10:41:50,522 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:41:50,523 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:50,523 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:50,523 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:41:50,523 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:41:50,523 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:41:50,524 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 10:41:50,524 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 10:41:50,524 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 10:41:50,524 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 10:41:50,525 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 10:41:50,525 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse12 (= ackermann_~n |ackermann_#in~n|)) (.cse4 (<= |ackermann_#in~m| 1)) (.cse6 (<= 1 |ackermann_#in~m|)) (.cse14 (<= 1 |ackermann_#in~n|)) (.cse2 (<= |ackermann_#in~m| ackermann_~m)) (.cse3 (<= |ackermann_#in~n| ackermann_~n)) (.cse10 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse5 (<= 2 |ackermann_#t~ret1|)) (.cse1 (= 4 |ackermann_#t~ret1|)) (.cse8 (<= |ackermann_#t~ret1| 3)) (.cse7 (and .cse2 (<= |ackermann_#in~m| 0) .cse3 (<= 0 |ackermann_#in~m|) .cse10)) (.cse9 (<= 2 |ackermann_#in~n|)) (.cse13 (and .cse2 (<= 3 |ackermann_#in~m|) .cse3 .cse10)) (.cse0 (<= 3 |ackermann_#in~n|)) (.cse11 (and .cse12 .cse10 .cse4 (= 2 |ackermann_#t~ret1|) .cse6 .cse14))) (and (or (and .cse0 .cse1) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse2 .cse3 (= 5 |ackermann_#t~ret1|) .cse4 .cse5 .cse6) .cse7 (and .cse8 .cse9 .cse6) (and .cse2 .cse3 (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|) .cse4 .cse5 .cse6) (and .cse2 (<= 2 |ackermann_#in~m|) .cse10) .cse11 (and (<= 6 |ackermann_#in~n|) .cse2 .cse3 .cse4 .cse5 .cse6)) (or (and .cse2 (= 3 |ackermann_#t~ret1|) .cse12 .cse3 .cse4 .cse10 .cse5 (<= |ackermann_#in~n| 2)) .cse7 (and .cse12 (<= 5 |ackermann_#t~ret1|) .cse10) (and .cse2 .cse12 .cse3 .cse4 .cse10 .cse5 (<= |ackermann_#in~n| 3) .cse6 .cse1) .cse13 (and .cse2 (< |ackermann_#in~n| 2))) (or (and (<= 3 |ackermann_#t~ret1|) .cse8 .cse12 .cse14) .cse7 (and (<= |ackermann_#t~ret1| 5) .cse9) .cse13 .cse0 .cse11)))) [2020-07-21 10:41:50,525 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 10:41:50,525 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 10:41:50,526 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 10:41:50,526 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 10:41:50,527 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 10:41:50,527 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 10:41:50,527 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 10:41:50,527 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 10:41:50,527 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 10:41:50,527 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 10:41:50,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:41:50 BoogieIcfgContainer [2020-07-21 10:41:50,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:41:50,535 INFO L168 Benchmark]: Toolchain (without parser) took 76740.86 ms. Allocated memory was 136.8 MB in the beginning and 674.2 MB in the end (delta: 537.4 MB). Free memory was 101.1 MB in the beginning and 221.5 MB in the end (delta: -120.3 MB). Peak memory consumption was 566.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,536 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.76 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,538 INFO L168 Benchmark]: Boogie Preprocessor took 163.93 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 91.4 MB in the beginning and 182.2 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,538 INFO L168 Benchmark]: RCFGBuilder took 300.21 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,539 INFO L168 Benchmark]: TraceAbstraction took 75895.74 ms. Allocated memory was 203.4 MB in the beginning and 674.2 MB in the end (delta: 470.8 MB). Free memory was 168.4 MB in the beginning and 221.5 MB in the end (delta: -53.1 MB). Peak memory consumption was 567.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:50,542 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 369.76 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.93 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 91.4 MB in the beginning and 182.2 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.21 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 75895.74 ms. Allocated memory was 203.4 MB in the beginning and 674.2 MB in the end (delta: 470.8 MB). Free memory was 168.4 MB in the beginning and 221.5 MB in the end (delta: -53.1 MB). Peak memory consumption was 567.2 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: 59.5s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 414 SDtfs, 639 SDslu, 2680 SDs, 0 SdLazy, 10049 SolverSat, 1953 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3869 GetRequests, 3141 SyntacticMatches, 178 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11766 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=4, 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, 324 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 725 PreInvPairs, 7372 NumberOfFragments, 337 HoareAnnotationTreeSize, 725 FomulaSimplifications, 459578 FormulaSimplificationTreeSizeReduction, 8.6s HoareSimplificationTime, 9 FomulaSimplificationsInter, 268241 FormulaSimplificationTreeSizeReductionInter, 7.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 34.6s InterpolantComputationTime, 1790 NumberOfCodeBlocks, 1790 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 3540 ConstructedInterpolants, 0 QuantifiedInterpolants, 1145948 SizeOfPredicates, 102 NumberOfNonLiveVariables, 5279 ConjunctsInSsa, 314 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26204/32210 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...