/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-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:58:57,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:58:57,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:58:57,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:58:57,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:58:57,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:58:57,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:58:57,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:58:57,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:58:57,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:58:57,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:58:57,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:58:57,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:58:57,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:58:57,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:58:57,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:58:57,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:58:57,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:58:57,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:58:57,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:58:57,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:58:57,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:58:57,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:58:57,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:58:57,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:58:57,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:58:57,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:58:57,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:58:57,822 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 10:58:57,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:58:57,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:58:57,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:58:57,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:58:57,845 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:58:57,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:58:57,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:58:57,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:58:57,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:58:57,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:58:57,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:58:57,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:58:57,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:58:57,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:58:57,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:58:57,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:58:57,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:58:57,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:58:57,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:58:57,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:58:57,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:58:57,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:58:57,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:58:57,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:58:57,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:58:57,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:58:57,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:57,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:58:57,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:58:57,852 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 10:58:58,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:58:58,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:58:58,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:58:58,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:58:58,181 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:58:58,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-21 10:58:58,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c37feb3c/193e48270d614262a718780e921aad8c/FLAGf2c9c7721 [2020-07-21 10:58:58,678 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:58:58,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-21 10:58:58,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c37feb3c/193e48270d614262a718780e921aad8c/FLAGf2c9c7721 [2020-07-21 10:58:59,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c37feb3c/193e48270d614262a718780e921aad8c [2020-07-21 10:58:59,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:58:59,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:58:59,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:58:59,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:58:59,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:58:59,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c75c4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59, skipping insertion in model container [2020-07-21 10:58:59,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:58:59,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:58:59,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:58:59,365 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:58:59,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:58:59,409 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:58:59,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59 WrapperNode [2020-07-21 10:58:59,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:58:59,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:58:59,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:58:59,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:58:59,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (1/1) ... [2020-07-21 10:58:59,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:58:59,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:58:59,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:58:59,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:58:59,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (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 10:58:59,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:58:59,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:58:59,695 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 10:58:59,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:58:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:58:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:58:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 10:58:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:58:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:58:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:58:59,950 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:58:59,950 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:58:59,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:58:59 BoogieIcfgContainer [2020-07-21 10:58:59,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:58:59,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:58:59,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:58:59,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:58:59,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:58:59" (1/3) ... [2020-07-21 10:58:59,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe65dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:58:59, skipping insertion in model container [2020-07-21 10:58:59,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:59" (2/3) ... [2020-07-21 10:58:59,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe65dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:58:59, skipping insertion in model container [2020-07-21 10:58:59,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:58:59" (3/3) ... [2020-07-21 10:58:59,974 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-07-21 10:58:59,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:59:00,004 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:59:00,028 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:59:00,065 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:59:00,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:59:00,067 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:59:00,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:59:00,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:59:00,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:59:00,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:59:00,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:59:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:59:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:59:00,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:00,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:00,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 10:59:00,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:00,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266159976] [2020-07-21 10:59:00,134 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 10:59:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:59:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:00,333 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 10:59:00,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:59:00,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266159976] [2020-07-21 10:59:00,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:59:00,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:59:00,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517885902] [2020-07-21 10:59:00,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:59:00,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:59:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:59:00,368 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 10:59:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:00,501 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 10:59:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:59:00,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:59:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:00,517 INFO L225 Difference]: With dead ends: 35 [2020-07-21 10:59:00,517 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:59:00,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:59:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:59:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:59:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:59:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:59:00,580 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 10:59:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:00,581 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:59:00,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:59:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:59:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:59:00,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:00,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:00,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:00,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 10:59:00,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:00,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031334984] [2020-07-21 10:59:00,803 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 10:59:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:59:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:00,884 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 10:59:00,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:59:00,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031334984] [2020-07-21 10:59:00,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:59:00,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:59:00,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744484203] [2020-07-21 10:59:00,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:59:00,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:00,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:59:00,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:59:00,890 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 10:59:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:00,953 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 10:59:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:59:00,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:59:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:00,956 INFO L225 Difference]: With dead ends: 27 [2020-07-21 10:59:00,956 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 10:59:00,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:59:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 10:59:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 10:59:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:59:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:59:00,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 10:59:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:00,967 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:59:00,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:59:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:59:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:59:00,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:00,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:01,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:01,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 10:59:01,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:01,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373601941] [2020-07-21 10:59:01,174 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 10:59:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:01,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:59:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:59:01,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:01,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:59:01,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373601941] [2020-07-21 10:59:01,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:01,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:59:01,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412770400] [2020-07-21 10:59:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:59:01,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:59:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:59:01,507 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 10:59:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:01,638 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 10:59:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:59:01,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 10:59:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:01,641 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:59:01,641 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:59:01,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:59:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:59:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:59:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:59:01,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 10:59:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:01,654 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:59:01,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:59:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:59:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:59:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:01,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:01,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:01,873 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 10:59:01,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:01,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751481227] [2020-07-21 10:59:01,875 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 10:59:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:59:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:59:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:02,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:59:02,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751481227] [2020-07-21 10:59:02,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:02,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:59:02,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314865211] [2020-07-21 10:59:02,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:59:02,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:59:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:59:02,123 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 10:59:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:02,214 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 10:59:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:59:02,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 10:59:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:02,218 INFO L225 Difference]: With dead ends: 37 [2020-07-21 10:59:02,218 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:59:02,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:59:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 10:59:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:59:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:59:02,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 10:59:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:02,231 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:59:02,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:59:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:59:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:59:02,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:02,233 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:02,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:02,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 10:59:02,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:02,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044158454] [2020-07-21 10:59:02,451 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 10:59:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:59:02,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 10:59:02,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:02,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:02,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:02,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:02,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:59:02,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044158454] [2020-07-21 10:59:02,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:02,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:59:02,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809350102] [2020-07-21 10:59:02,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:59:02,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:59:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:02,944 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 10:59:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:03,097 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 10:59:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:59:03,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 10:59:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:03,100 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:59:03,100 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 10:59:03,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 10:59:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 10:59:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:59:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:59:03,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 10:59:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:03,112 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:59:03,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:59:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:59:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:59:03,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:03,115 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:03,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:03,317 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 10:59:03,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:03,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341640575] [2020-07-21 10:59:03,320 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 10:59:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:03,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:59:03,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 10:59:03,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:03,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:59:03,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341640575] [2020-07-21 10:59:03,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:03,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:59:03,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165335613] [2020-07-21 10:59:03,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:59:03,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:59:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:59:03,703 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 10:59:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:03,841 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 10:59:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:59:03,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:59:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:03,845 INFO L225 Difference]: With dead ends: 47 [2020-07-21 10:59:03,845 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 10:59:03,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 10:59:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 10:59:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:59:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:59:03,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 10:59:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:03,858 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:59:03,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:59:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:59:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 10:59:03,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:03,861 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:04,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:04,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 10:59:04,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:04,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189373094] [2020-07-21 10:59:04,070 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 10:59:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:59:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 10:59:04,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:04,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:59:04,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189373094] [2020-07-21 10:59:04,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:04,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:59:04,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629286958] [2020-07-21 10:59:04,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:59:04,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:59:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:59:04,806 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 10:59:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:04,996 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 10:59:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:59:04,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 10:59:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:05,000 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:59:05,000 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 10:59:05,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 10:59:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 10:59:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:59:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:59:05,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 10:59:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:05,037 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:59:05,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:59:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:59:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 10:59:05,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:05,044 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:05,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:05,250 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 10:59:05,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:05,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099344990] [2020-07-21 10:59:05,253 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 10:59:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:59:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 10:59:05,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:05,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 10:59:06,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099344990] [2020-07-21 10:59:06,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:06,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 10:59:06,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788282065] [2020-07-21 10:59:06,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:59:06,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:59:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:59:06,045 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 12 states. [2020-07-21 10:59:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:06,210 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 10:59:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:59:06,210 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-07-21 10:59:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:06,213 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:59:06,213 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:59:06,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:59:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:59:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 10:59:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:59:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:59:06,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 10:59:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:06,229 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:59:06,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:59:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:59:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 10:59:06,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:06,232 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:06,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:06,445 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 10:59:06,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:06,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252897585] [2020-07-21 10:59:06,448 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 10:59:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 10:59:06,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:07,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 10:59:07,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252897585] [2020-07-21 10:59:07,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:07,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 10:59:07,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196354510] [2020-07-21 10:59:07,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:07,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:07,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:07,608 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 14 states. [2020-07-21 10:59:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:07,865 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 10:59:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:07,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2020-07-21 10:59:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:07,869 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:59:07,870 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:59:07,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:59:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 10:59:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:59:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:59:07,886 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 10:59:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:07,887 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:59:07,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:59:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:59:07,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:07,891 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:08,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:08,105 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 10:59:08,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:08,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466878134] [2020-07-21 10:59:08,107 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 10:59:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 221 proven. 407 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-07-21 10:59:08,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:09,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 223 proven. 427 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-07-21 10:59:09,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466878134] [2020-07-21 10:59:09,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:09,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 10:59:09,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454070907] [2020-07-21 10:59:09,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:09,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:09,429 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 14 states. [2020-07-21 10:59:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:09,629 INFO L93 Difference]: Finished difference Result 88 states and 260 transitions. [2020-07-21 10:59:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:09,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 190 [2020-07-21 10:59:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:09,632 INFO L225 Difference]: With dead ends: 88 [2020-07-21 10:59:09,632 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 10:59:09,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 10:59:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-21 10:59:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 10:59:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2020-07-21 10:59:09,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 190 [2020-07-21 10:59:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:09,646 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 70 transitions. [2020-07-21 10:59:09,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 70 transitions. [2020-07-21 10:59:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-21 10:59:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:09,651 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:09,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:09,865 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-07-21 10:59:09,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:09,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588635255] [2020-07-21 10:59:09,866 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 10:59:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-21 10:59:10,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:10,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 130 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-07-21 10:59:10,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588635255] [2020-07-21 10:59:10,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 10:59:10,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624732854] [2020-07-21 10:59:10,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:10,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:11,001 INFO L87 Difference]: Start difference. First operand 49 states and 70 transitions. Second operand 14 states. [2020-07-21 10:59:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:11,164 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-07-21 10:59:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:11,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2020-07-21 10:59:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:11,166 INFO L225 Difference]: With dead ends: 67 [2020-07-21 10:59:11,167 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 10:59:11,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 248 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 10:59:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 10:59:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 10:59:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-21 10:59:11,181 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 136 [2020-07-21 10:59:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:11,182 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-21 10:59:11,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-21 10:59:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 10:59:11,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:11,185 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:11,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:11,398 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-07-21 10:59:11,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:11,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251871503] [2020-07-21 10:59:11,399 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 10:59:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 10:59:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-21 10:59:11,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-21 10:59:12,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251871503] [2020-07-21 10:59:12,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:12,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-07-21 10:59:12,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503955014] [2020-07-21 10:59:12,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:59:12,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:59:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:59:12,536 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 20 states. [2020-07-21 10:59:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:12,835 INFO L93 Difference]: Finished difference Result 112 states and 191 transitions. [2020-07-21 10:59:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 10:59:12,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-07-21 10:59:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:12,842 INFO L225 Difference]: With dead ends: 112 [2020-07-21 10:59:12,842 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 10:59:12,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:59:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 10:59:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2020-07-21 10:59:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 10:59:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 145 transitions. [2020-07-21 10:59:12,899 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 145 transitions. Word has length 109 [2020-07-21 10:59:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:12,899 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 145 transitions. [2020-07-21 10:59:12,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:59:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 145 transitions. [2020-07-21 10:59:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:59:12,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:12,907 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:13,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:13,122 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1349477645, now seen corresponding path program 7 times [2020-07-21 10:59:13,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:13,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979889082] [2020-07-21 10:59:13,125 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 10:59:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:59:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 233 proven. 55 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-21 10:59:13,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:13,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:13,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:13,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:14,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 230 proven. 70 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 10:59:14,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979889082] [2020-07-21 10:59:14,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:14,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-21 10:59:14,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048474148] [2020-07-21 10:59:14,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:14,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:14,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:14,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:14,103 INFO L87 Difference]: Start difference. First operand 81 states and 145 transitions. Second operand 14 states. [2020-07-21 10:59:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:14,283 INFO L93 Difference]: Finished difference Result 97 states and 160 transitions. [2020-07-21 10:59:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:14,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-21 10:59:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:14,286 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:59:14,286 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 10:59:14,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 10:59:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-07-21 10:59:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 10:59:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 123 transitions. [2020-07-21 10:59:14,306 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 123 transitions. Word has length 121 [2020-07-21 10:59:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:14,309 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 123 transitions. [2020-07-21 10:59:14,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 123 transitions. [2020-07-21 10:59:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:59:14,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:14,314 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:14,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:14,529 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash -280177283, now seen corresponding path program 8 times [2020-07-21 10:59:14,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:14,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782137536] [2020-07-21 10:59:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:59:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 147 proven. 141 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-21 10:59:14,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:15,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 146 proven. 154 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 10:59:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782137536] [2020-07-21 10:59:15,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:15,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-21 10:59:15,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755534523] [2020-07-21 10:59:15,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:15,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:15,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:15,458 INFO L87 Difference]: Start difference. First operand 71 states and 123 transitions. Second operand 14 states. [2020-07-21 10:59:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:15,637 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-21 10:59:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:15,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-21 10:59:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:15,642 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:59:15,642 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 10:59:15,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 10:59:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-07-21 10:59:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:59:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 95 transitions. [2020-07-21 10:59:15,666 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 95 transitions. Word has length 121 [2020-07-21 10:59:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:15,669 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 95 transitions. [2020-07-21 10:59:15,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 95 transitions. [2020-07-21 10:59:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 10:59:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:15,672 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 7, 7, 7, 7, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:15,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:15,875 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1402909364, now seen corresponding path program 9 times [2020-07-21 10:59:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:15,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18436173] [2020-07-21 10:59:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 78 proven. 202 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-07-21 10:59:16,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:16,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:17,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 84 proven. 218 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-07-21 10:59:17,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18436173] [2020-07-21 10:59:17,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:17,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 10:59:17,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035087745] [2020-07-21 10:59:17,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:17,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:17,043 INFO L87 Difference]: Start difference. First operand 61 states and 95 transitions. Second operand 14 states. [2020-07-21 10:59:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:17,237 INFO L93 Difference]: Finished difference Result 109 states and 171 transitions. [2020-07-21 10:59:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:17,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2020-07-21 10:59:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:17,240 INFO L225 Difference]: With dead ends: 109 [2020-07-21 10:59:17,241 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:59:17,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 196 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:59:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 10:59:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 10:59:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-21 10:59:17,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 110 [2020-07-21 10:59:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-21 10:59:17,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-21 10:59:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:59:17,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:17,255 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:17,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:17,469 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1072341053, now seen corresponding path program 10 times [2020-07-21 10:59:17,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:17,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241360606] [2020-07-21 10:59:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:59:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 113 proven. 175 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2020-07-21 10:59:17,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:18,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 114 proven. 186 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 10:59:18,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241360606] [2020-07-21 10:59:18,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:18,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-21 10:59:18,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137479245] [2020-07-21 10:59:18,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:59:18,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:59:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:59:18,455 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 14 states. [2020-07-21 10:59:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:18,598 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-07-21 10:59:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:59:18,598 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-21 10:59:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:18,600 INFO L225 Difference]: With dead ends: 75 [2020-07-21 10:59:18,603 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:59:18,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 220 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:59:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:59:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-21 10:59:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 10:59:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-07-21 10:59:18,612 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 121 [2020-07-21 10:59:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:18,612 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-07-21 10:59:18,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:59:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-07-21 10:59:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:59:18,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:18,615 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:18,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:18,829 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -419017667, now seen corresponding path program 11 times [2020-07-21 10:59:18,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:18,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703025684] [2020-07-21 10:59:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:59:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 116 proven. 217 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-07-21 10:59:19,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:19,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 112 proven. 243 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2020-07-21 10:59:20,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703025684] [2020-07-21 10:59:20,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:20,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 10:59:20,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446338246] [2020-07-21 10:59:20,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:59:20,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:59:20,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:59:20,214 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 16 states. [2020-07-21 10:59:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:20,402 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-07-21 10:59:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:20,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-07-21 10:59:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:20,404 INFO L225 Difference]: With dead ends: 77 [2020-07-21 10:59:20,404 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:59:20,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:59:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:59:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:59:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:59:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:59:20,407 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 10:59:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:20,407 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:59:20,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:59:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:59:20,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:59:20,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:20,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:59:21,014 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 34 [2020-07-21 10:59:21,306 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 67 [2020-07-21 10:59:21,443 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-07-21 10:59:21,583 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-21 10:59:21,731 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2020-07-21 10:59:22,165 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-21 10:59:24,058 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 31 [2020-07-21 10:59:24,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,082 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,082 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:59:24,082 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:59:24,082 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-21 10:59:24,082 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-21 10:59:24,082 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 10:59:24,083 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 10:59:24,083 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-21 10:59:24,083 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-21 10:59:24,083 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 10:59:24,083 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-21 10:59:24,083 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-21 10:59:24,084 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-21 10:59:24,084 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-21 10:59:24,084 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-21 10:59:24,084 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 10:59:24,084 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (and (= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4))) (.cse1 (<= |fibo_#in~n| 3))) (and (or .cse0 (and (<= 3 |fibo_#in~n|) .cse1) (<= 5 |fibo_#in~n|) (and (<= |fibo_#in~n| 2) (<= 2 |fibo_#in~n|))) (or .cse0 (<= 6 |fibo_#in~n|) (= |fibo_#t~ret0| 3) .cse1) (let ((.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#in~n| fibo_~n))) (or (and (<= 4 |fibo_#in~n|) .cse2 .cse3) (and (= |fibo_#t~ret0| 1) .cse2 .cse3))))) [2020-07-21 10:59:24,085 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-21 10:59:24,085 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-21 10:59:24,085 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-21 10:59:24,085 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-21 10:59:24,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:59:24 BoogieIcfgContainer [2020-07-21 10:59:24,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:59:24,093 INFO L168 Benchmark]: Toolchain (without parser) took 24987.70 ms. Allocated memory was 138.9 MB in the beginning and 402.1 MB in the end (delta: 263.2 MB). Free memory was 102.9 MB in the beginning and 165.7 MB in the end (delta: -62.8 MB). Peak memory consumption was 256.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,094 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.78 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,095 INFO L168 Benchmark]: Boogie Preprocessor took 42.86 ms. Allocated memory is still 138.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,096 INFO L168 Benchmark]: RCFGBuilder took 504.06 ms. Allocated memory was 138.9 MB in the beginning and 207.1 MB in the end (delta: 68.2 MB). Free memory was 91.5 MB in the beginning and 175.1 MB in the end (delta: -83.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,097 INFO L168 Benchmark]: TraceAbstraction took 24130.25 ms. Allocated memory was 207.1 MB in the beginning and 402.1 MB in the end (delta: 195.0 MB). Free memory was 174.4 MB in the beginning and 165.7 MB in the end (delta: 8.7 MB). Peak memory consumption was 259.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:59:24,099 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 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.78 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.86 ms. Allocated memory is still 138.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 504.06 ms. Allocated memory was 138.9 MB in the beginning and 207.1 MB in the end (delta: 68.2 MB). Free memory was 91.5 MB in the beginning and 175.1 MB in the end (delta: -83.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24130.25 ms. Allocated memory was 207.1 MB in the beginning and 402.1 MB in the end (delta: 195.0 MB). Free memory was 174.4 MB in the beginning and 165.7 MB in the end (delta: 8.7 MB). Peak memory consumption was 259.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.5s, OverallIterations: 17, TraceHistogramMax: 27, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 377 SDtfs, 425 SDslu, 1661 SDs, 0 SdLazy, 1640 SolverSat, 425 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2958 GetRequests, 2601 SyntacticMatches, 123 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 135 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 95 PreInvPairs, 1452 NumberOfFragments, 86 HoareAnnotationTreeSize, 95 FomulaSimplifications, 595296 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5107 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 1467 NumberOfCodeBlocks, 1467 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2875 ConstructedInterpolants, 0 QuantifiedInterpolants, 608965 SizeOfPredicates, 73 NumberOfNonLiveVariables, 3278 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 12349/16608 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...