/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:29:44,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:29:44,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:29:44,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:29:44,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:29:44,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:29:44,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:29:44,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:29:44,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:29:44,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:29:44,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:29:44,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:29:44,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:29:44,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:29:44,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:29:44,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:29:44,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:29:44,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:29:44,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:29:44,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:29:44,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:29:44,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:29:44,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:29:44,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:29:44,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:29:44,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:29:44,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:29:44,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:29:44,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:29:44,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:29:44,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:29:44,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:29:44,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:29:44,905 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:29:44,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:29:44,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:29:44,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:29:44,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:29:44,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:29:44,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:29:44,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:29:44,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:29:44,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:29:44,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:29:44,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:29:44,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:29:44,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:29:44,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:29:44,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:29:44,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:29:44,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:29:44,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:29:44,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:29:44,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:29:44,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:29:44,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:44,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:29:44,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:29:44,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:29:45,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:29:45,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:29:45,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:29:45,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:29:45,263 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:29:45,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-20 16:29:45,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220aa12c6/9fd71ca564cd472aa9bde396e434f799/FLAGcd535306d [2020-07-20 16:29:45,788 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:29:45,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-20 16:29:45,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220aa12c6/9fd71ca564cd472aa9bde396e434f799/FLAGcd535306d [2020-07-20 16:29:46,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/220aa12c6/9fd71ca564cd472aa9bde396e434f799 [2020-07-20 16:29:46,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:29:46,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:29:46,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:46,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:29:46,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:29:46,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e6f309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46, skipping insertion in model container [2020-07-20 16:29:46,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:29:46,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:29:46,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:46,448 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:29:46,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:46,477 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:29:46,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46 WrapperNode [2020-07-20 16:29:46,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:46,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:29:46,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:29:46,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:29:46,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... [2020-07-20 16:29:46,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:29:46,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:29:46,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:29:46,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:29:46,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:29:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:29:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:29:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 16:29:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:29:46,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:29:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:29:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 16:29:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:29:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:29:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:29:46,857 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:29:46,857 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:29:46,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:46 BoogieIcfgContainer [2020-07-20 16:29:46,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:29:46,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:29:46,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:29:46,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:29:46,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:29:46" (1/3) ... [2020-07-20 16:29:46,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2683be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:46, skipping insertion in model container [2020-07-20 16:29:46,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:46" (2/3) ... [2020-07-20 16:29:46,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2683be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:46, skipping insertion in model container [2020-07-20 16:29:46,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:46" (3/3) ... [2020-07-20 16:29:46,869 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-20 16:29:46,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:29:46,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:29:46,899 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:29:46,925 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:29:46,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:29:46,926 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:29:46,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:29:46,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:29:46,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:29:46,926 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:29:46,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:29:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 16:29:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:29:46,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:46,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:46,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-20 16:29:46,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:46,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101203340] [2020-07-20 16:29:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:47,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:29:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:47,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:47,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101203340] [2020-07-20 16:29:47,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:47,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:29:47,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633073733] [2020-07-20 16:29:47,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:29:47,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:29:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:29:47,170 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 16:29:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:47,310 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 16:29:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:29:47,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 16:29:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:47,323 INFO L225 Difference]: With dead ends: 36 [2020-07-20 16:29:47,324 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 16:29:47,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:29:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 16:29:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 16:29:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 16:29:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 16:29:47,373 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-20 16:29:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:47,374 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 16:29:47,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:29:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 16:29:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 16:29:47,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:47,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:47,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:47,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-20 16:29:47,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:47,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878011675] [2020-07-20 16:29:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:47,632 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:29:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:47,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:47,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878011675] [2020-07-20 16:29:47,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:47,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:29:47,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087328932] [2020-07-20 16:29:47,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:29:47,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:29:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:29:47,696 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-20 16:29:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:47,779 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-20 16:29:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:29:47,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 16:29:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:47,782 INFO L225 Difference]: With dead ends: 28 [2020-07-20 16:29:47,782 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 16:29:47,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:29:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 16:29:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-20 16:29:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 16:29:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 16:29:47,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-20 16:29:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:47,793 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 16:29:47,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:29:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 16:29:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:29:47,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:47,795 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] [2020-07-20 16:29:48,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:48,010 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-20 16:29:48,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:48,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182898692] [2020-07-20 16:29:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:48,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:29:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:29:48,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:48,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:29:48,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182898692] [2020-07-20 16:29:48,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:48,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-20 16:29:48,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095215482] [2020-07-20 16:29:48,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 16:29:48,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 16:29:48,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:29:48,353 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2020-07-20 16:29:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:48,488 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-07-20 16:29:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:29:48,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 16:29:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:48,491 INFO L225 Difference]: With dead ends: 40 [2020-07-20 16:29:48,491 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 16:29:48,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:29:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 16:29:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 16:29:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 16:29:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2020-07-20 16:29:48,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 27 [2020-07-20 16:29:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:48,505 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2020-07-20 16:29:48,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 16:29:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-07-20 16:29:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 16:29:48,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:48,508 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:48,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:48,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 1 times [2020-07-20 16:29:48,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:48,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283824019] [2020-07-20 16:29:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:48,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:48,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:29:48,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 16:29:48,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:49,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 16:29:49,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283824019] [2020-07-20 16:29:49,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:49,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 16:29:49,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253362178] [2020-07-20 16:29:49,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:29:49,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:29:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:29:49,439 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 13 states. [2020-07-20 16:29:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:49,733 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2020-07-20 16:29:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:29:49,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 16:29:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:49,736 INFO L225 Difference]: With dead ends: 64 [2020-07-20 16:29:49,736 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 16:29:49,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:29:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 16:29:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 16:29:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 16:29:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-07-20 16:29:49,752 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 55 [2020-07-20 16:29:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:49,753 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-07-20 16:29:49,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:29:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-07-20 16:29:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 16:29:49,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:49,761 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:49,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:49,963 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1197309312, now seen corresponding path program 2 times [2020-07-20 16:29:49,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:49,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422931547] [2020-07-20 16:29:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:50,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:29:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 12 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-07-20 16:29:50,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:50,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:50,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 126 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-20 16:29:50,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422931547] [2020-07-20 16:29:50,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:50,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 16:29:50,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359866396] [2020-07-20 16:29:50,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:29:50,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:29:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:50,620 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 11 states. [2020-07-20 16:29:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:50,771 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-07-20 16:29:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:29:50,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-07-20 16:29:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:50,775 INFO L225 Difference]: With dead ends: 75 [2020-07-20 16:29:50,776 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 16:29:50,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:29:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 16:29:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-20 16:29:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 16:29:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 16:29:50,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 94 [2020-07-20 16:29:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 16:29:50,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:29:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 16:29:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 16:29:50,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:50,807 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:51,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:51,023 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:51,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1611334083, now seen corresponding path program 3 times [2020-07-20 16:29:51,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:51,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471075547] [2020-07-20 16:29:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:51,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:51,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:29:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 120 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-20 16:29:51,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:51,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:51,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:52,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:52,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-20 16:29:52,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471075547] [2020-07-20 16:29:52,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:52,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 16:29:52,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860049004] [2020-07-20 16:29:52,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:29:52,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:29:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:52,058 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 17 states. [2020-07-20 16:29:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:52,467 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2020-07-20 16:29:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 16:29:52,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-07-20 16:29:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:52,472 INFO L225 Difference]: With dead ends: 85 [2020-07-20 16:29:52,472 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 16:29:52,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:29:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 16:29:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-20 16:29:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 16:29:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-07-20 16:29:52,484 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 83 [2020-07-20 16:29:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:52,485 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-07-20 16:29:52,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:29:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-07-20 16:29:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 16:29:52,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:52,486 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:52,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:52,700 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 4 times [2020-07-20 16:29:52,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:52,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672651847] [2020-07-20 16:29:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:52,756 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:29:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 16:29:52,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:53,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 16:29:53,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672651847] [2020-07-20 16:29:53,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:53,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2020-07-20 16:29:53,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057952253] [2020-07-20 16:29:53,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 16:29:53,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 16:29:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:29:53,363 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 14 states. [2020-07-20 16:29:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:53,555 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-20 16:29:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:29:53,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-07-20 16:29:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:53,558 INFO L225 Difference]: With dead ends: 61 [2020-07-20 16:29:53,558 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 16:29:53,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:29:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 16:29:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-20 16:29:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 16:29:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-07-20 16:29:53,571 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 69 [2020-07-20 16:29:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:53,572 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-07-20 16:29:53,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 16:29:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-07-20 16:29:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-20 16:29:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:53,577 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 29, 17, 17, 17, 17, 17, 17, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:53,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:53,785 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1194505795, now seen corresponding path program 5 times [2020-07-20 16:29:53,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:53,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223558685] [2020-07-20 16:29:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:53,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:53,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:29:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 1896 proven. 276 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-07-20 16:29:54,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:55,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:55,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:55,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 316 proven. 1092 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-07-20 16:29:56,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223558685] [2020-07-20 16:29:56,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:56,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 16:29:56,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786490582] [2020-07-20 16:29:56,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:29:56,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:56,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:29:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:29:56,228 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 21 states. [2020-07-20 16:29:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:56,805 INFO L93 Difference]: Finished difference Result 118 states and 183 transitions. [2020-07-20 16:29:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:29:56,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 247 [2020-07-20 16:29:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:56,809 INFO L225 Difference]: With dead ends: 118 [2020-07-20 16:29:56,810 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:29:56,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 457 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:29:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:29:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 16:29:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 16:29:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-07-20 16:29:56,837 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 247 [2020-07-20 16:29:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:56,838 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-07-20 16:29:56,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:29:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-07-20 16:29:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-20 16:29:56,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:56,850 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:57,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:57,067 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 6 times [2020-07-20 16:29:57,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:57,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452082819] [2020-07-20 16:29:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:57,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:57,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:29:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-20 16:29:57,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:58,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:59,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:59,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:59,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:59,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-20 16:29:59,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452082819] [2020-07-20 16:29:59,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:59,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 16:29:59,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320744215] [2020-07-20 16:29:59,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:29:59,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:29:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:29:59,876 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 25 states. [2020-07-20 16:30:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:00,647 INFO L93 Difference]: Finished difference Result 145 states and 221 transitions. [2020-07-20 16:30:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:30:00,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 219 [2020-07-20 16:30:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:00,656 INFO L225 Difference]: With dead ends: 145 [2020-07-20 16:30:00,656 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 16:30:00,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 393 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:30:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 16:30:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-07-20 16:30:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 16:30:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-07-20 16:30:00,669 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2020-07-20 16:30:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:00,670 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-07-20 16:30:00,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:30:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-07-20 16:30:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 16:30:00,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:00,676 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:00,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:00,890 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2082787635, now seen corresponding path program 7 times [2020-07-20 16:30:00,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:00,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649891345] [2020-07-20 16:30:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:01,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:30:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 964 proven. 1596 refuted. 0 times theorem prover too weak. 3479 trivial. 0 not checked. [2020-07-20 16:30:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:03,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:03,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:04,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 964 proven. 1676 refuted. 0 times theorem prover too weak. 3399 trivial. 0 not checked. [2020-07-20 16:30:05,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649891345] [2020-07-20 16:30:05,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:05,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 16:30:05,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012561930] [2020-07-20 16:30:05,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:30:05,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:30:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:30:05,576 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 29 states. [2020-07-20 16:30:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:06,608 INFO L93 Difference]: Finished difference Result 183 states and 294 transitions. [2020-07-20 16:30:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 16:30:06,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 328 [2020-07-20 16:30:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:06,612 INFO L225 Difference]: With dead ends: 183 [2020-07-20 16:30:06,612 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 16:30:06,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 603 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 16:30:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 16:30:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-20 16:30:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 16:30:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2020-07-20 16:30:06,627 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 328 [2020-07-20 16:30:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:06,628 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2020-07-20 16:30:06,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:30:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2020-07-20 16:30:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-20 16:30:06,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:06,630 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:06,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:06,844 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash 39069676, now seen corresponding path program 8 times [2020-07-20 16:30:06,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:06,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972088518] [2020-07-20 16:30:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:07,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:30:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-20 16:30:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:08,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-20 16:30:09,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972088518] [2020-07-20 16:30:09,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:09,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2020-07-20 16:30:09,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907448402] [2020-07-20 16:30:09,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:30:09,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:30:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:30:09,750 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand 20 states. [2020-07-20 16:30:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:10,076 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-20 16:30:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:30:10,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 287 [2020-07-20 16:30:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:10,080 INFO L225 Difference]: With dead ends: 110 [2020-07-20 16:30:10,080 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 16:30:10,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 542 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:30:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 16:30:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-20 16:30:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 16:30:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2020-07-20 16:30:10,094 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 287 [2020-07-20 16:30:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:10,095 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2020-07-20 16:30:10,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:30:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2020-07-20 16:30:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-07-20 16:30:10,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:10,103 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:10,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:10,318 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1040725259, now seen corresponding path program 9 times [2020-07-20 16:30:10,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:10,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574701708] [2020-07-20 16:30:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:10,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 16:30:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 19991 proven. 3340 refuted. 0 times theorem prover too weak. 16157 trivial. 0 not checked. [2020-07-20 16:30:11,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:16,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:16,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:16,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:16,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:16,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:17,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:17,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:17,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:18,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 2346 proven. 6780 refuted. 0 times theorem prover too weak. 30362 trivial. 0 not checked. [2020-07-20 16:30:20,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574701708] [2020-07-20 16:30:20,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:20,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-20 16:30:20,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155209899] [2020-07-20 16:30:20,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:30:20,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:30:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:30:20,379 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 33 states. [2020-07-20 16:30:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:21,694 INFO L93 Difference]: Finished difference Result 226 states and 393 transitions. [2020-07-20 16:30:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 16:30:21,695 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 818 [2020-07-20 16:30:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:21,698 INFO L225 Difference]: With dead ends: 226 [2020-07-20 16:30:21,700 INFO L226 Difference]: Without dead ends: 131 [2020-07-20 16:30:21,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1575 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:30:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-20 16:30:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2020-07-20 16:30:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-20 16:30:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 165 transitions. [2020-07-20 16:30:21,736 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 165 transitions. Word has length 818 [2020-07-20 16:30:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:21,739 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 165 transitions. [2020-07-20 16:30:21,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:30:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 165 transitions. [2020-07-20 16:30:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2020-07-20 16:30:21,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:21,757 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:21,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:21,971 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 405953011, now seen corresponding path program 10 times [2020-07-20 16:30:21,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:21,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212491067] [2020-07-20 16:30:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:22,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:22,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:22,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 16:30:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 4390 proven. 9059 refuted. 0 times theorem prover too weak. 50332 trivial. 0 not checked. [2020-07-20 16:30:23,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:28,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:29,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:30,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:31,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:33,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:34,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:35,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 4390 proven. 9236 refuted. 0 times theorem prover too weak. 50155 trivial. 0 not checked. [2020-07-20 16:30:36,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212491067] [2020-07-20 16:30:36,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:36,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37] total 41 [2020-07-20 16:30:36,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875029348] [2020-07-20 16:30:36,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 16:30:36,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 16:30:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 16:30:36,429 INFO L87 Difference]: Start difference. First operand 116 states and 165 transitions. Second operand 41 states. [2020-07-20 16:30:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:38,974 INFO L93 Difference]: Finished difference Result 295 states and 563 transitions. [2020-07-20 16:30:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-20 16:30:38,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1036 [2020-07-20 16:30:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:38,982 INFO L225 Difference]: With dead ends: 295 [2020-07-20 16:30:38,982 INFO L226 Difference]: Without dead ends: 188 [2020-07-20 16:30:38,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2112 GetRequests, 1999 SyntacticMatches, 33 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1531, Invalid=5111, Unknown=0, NotChecked=0, Total=6642 [2020-07-20 16:30:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-20 16:30:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2020-07-20 16:30:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 16:30:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2020-07-20 16:30:39,011 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 1036 [2020-07-20 16:30:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:39,016 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2020-07-20 16:30:39,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 16:30:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2020-07-20 16:30:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 16:30:39,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:39,021 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:39,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:39,222 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 11 times [2020-07-20 16:30:39,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:39,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137077098] [2020-07-20 16:30:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:39,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-20 16:30:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 16:30:40,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:42,448 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:42,643 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:42,845 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:43,057 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:44,131 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:30:44,574 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:30:45,013 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:30:45,483 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:30:45,933 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:30:47,635 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:47,829 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:48,037 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:48,282 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:49,336 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-20 16:30:50,394 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-20 16:30:51,496 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 16:30:52,647 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 16:30:53,634 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:30:53,738 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:30:54,433 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:54,644 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:30:54,864 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:55,086 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:30:55,879 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:30:56,087 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:30:56,193 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:30:56,663 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:30:57,130 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:30:57,610 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:30:58,122 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:31:00,776 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-20 16:31:03,506 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-20 16:31:06,286 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-20 16:31:09,091 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-20 16:31:10,162 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:10,273 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:10,396 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:10,515 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:11,315 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:11,552 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:11,792 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:12,037 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:13,010 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:13,122 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:13,244 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:13,364 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:13,881 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:31:14,404 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:31:14,939 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:31:15,469 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:31:16,047 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-20 16:31:16,593 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-20 16:31:17,126 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-20 16:31:17,645 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-20 16:31:18,149 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-20 16:31:18,642 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-07-20 16:31:19,163 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-20 16:31:19,638 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2020-07-20 16:31:20,103 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 16:31:20,563 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-20 16:31:21,022 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-07-20 16:31:21,458 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-07-20 16:31:21,886 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-20 16:31:22,311 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-20 16:31:22,735 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-07-20 16:31:23,141 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-07-20 16:31:23,533 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-20 16:31:23,913 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-20 16:31:24,290 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-07-20 16:31:24,675 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 16:31:25,034 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-20 16:31:25,424 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-07-20 16:31:25,775 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-20 16:31:26,113 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-20 16:31:26,440 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:31:26,768 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-20 16:31:27,086 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-07-20 16:31:27,402 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-07-20 16:31:27,710 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 16:31:28,010 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-07-20 16:31:28,313 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-20 16:31:28,601 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-07-20 16:31:28,882 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-20 16:31:29,150 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-07-20 16:31:29,411 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-07-20 16:31:29,665 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-20 16:31:29,915 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 16:31:30,153 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 16:31:30,386 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 16:31:30,610 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-20 16:31:30,827 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-20 16:31:31,038 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-20 16:31:31,251 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 16:31:31,450 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 16:31:31,643 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 16:31:31,827 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:32,010 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-20 16:31:32,182 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 16:31:32,348 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-20 16:31:32,503 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-20 16:31:32,656 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:31:32,799 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 16:31:32,939 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 16:31:33,098 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 16:31:33,224 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 16:31:33,354 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 16:31:33,470 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 16:31:33,578 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 16:31:33,684 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 16:31:35,889 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:36,020 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:36,157 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:36,292 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:36,432 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 16:31:36,566 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:31:36,689 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 16:31:36,806 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 16:31:36,922 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 16:31:37,036 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 16:31:37,143 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 16:31:41,670 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:41,808 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:41,958 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:42,100 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:43,113 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:43,384 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:43,703 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:43,983 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:47,551 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:47,686 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:47,832 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:47,978 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:51,559 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:51,704 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:51,859 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:52,006 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:53,049 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:53,335 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:31:53,622 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:53,906 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:31:55,162 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:55,335 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:55,486 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:55,641 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:56,217 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:31:56,800 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:31:57,388 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:31:57,969 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:31:59,282 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:59,431 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:31:59,588 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:31:59,744 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:00,887 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:01,178 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:01,478 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:01,785 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:03,099 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-20 16:32:04,436 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-20 16:32:05,807 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 16:32:07,168 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 16:32:07,989 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:08,103 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:08,225 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:08,342 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:08,977 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:09,144 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:09,316 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:09,484 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:10,765 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:11,080 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:11,405 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:11,725 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:12,090 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-20 16:32:12,406 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-20 16:32:12,721 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-20 16:32:13,019 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-20 16:32:13,314 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 16:32:13,594 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-20 16:32:13,870 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-07-20 16:32:14,142 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-20 16:32:14,410 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-20 16:32:14,670 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 16:32:14,914 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-20 16:32:15,159 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-07-20 16:32:15,392 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 16:32:15,620 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 16:32:15,843 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 16:32:16,059 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-20 16:32:16,270 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-20 16:32:16,474 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-20 16:32:16,666 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-20 16:32:16,851 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-20 16:32:17,028 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 16:32:17,201 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-20 16:32:17,365 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 16:32:17,524 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 16:32:17,672 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 16:32:17,819 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 16:32:17,963 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 16:32:18,098 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 16:32:18,231 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:18,353 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 16:32:18,466 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 16:32:18,574 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 16:32:23,807 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:23,974 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:24,154 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:24,333 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:26,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:26,330 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:29,178 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:29,351 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:29,532 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:29,717 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:31,081 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:31,422 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:31,774 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:32,112 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:33,101 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:33,207 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:33,849 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:34,025 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:34,211 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:34,399 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:35,085 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:32:35,782 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-20 16:32:36,469 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:32:37,169 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 16:32:38,043 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:38,249 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:38,356 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:39,025 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:39,208 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:39,401 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:39,592 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:39,788 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 16:32:39,973 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:32:40,150 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 16:32:40,320 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 16:32:40,481 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 16:32:40,638 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 16:32:40,788 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 16:32:40,929 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 16:32:41,067 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 16:32:41,202 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 16:32:41,321 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 16:32:41,438 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 16:32:41,548 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 16:32:44,294 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:44,403 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:46,644 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:46,756 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:46,866 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:47,554 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:47,740 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:47,958 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:48,162 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:49,019 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:49,123 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:49,234 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:49,340 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:49,699 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:50,063 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 16:32:50,443 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:50,817 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-20 16:32:51,711 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:51,815 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:51,927 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:52,046 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:52,159 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 16:32:52,262 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 16:32:55,075 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:55,180 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:55,295 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:55,409 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:56,118 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:56,313 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 16:32:56,518 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:56,723 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 16:32:58,674 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:58,778 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:58,892 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:32:59,007 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 16:33:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 16:33:00,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137077098] [2020-07-20 16:33:00,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:33:00,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 16:33:00,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497058093] [2020-07-20 16:33:00,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 16:33:00,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:33:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 16:33:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 16:33:00,728 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand 36 states. [2020-07-20 16:33:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:33:01,466 INFO L93 Difference]: Finished difference Result 147 states and 218 transitions. [2020-07-20 16:33:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 16:33:01,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-20 16:33:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:33:01,476 INFO L225 Difference]: With dead ends: 147 [2020-07-20 16:33:01,476 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:33:01,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 16:33:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:33:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:33:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:33:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:33:01,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-20 16:33:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:33:01,479 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:33:01,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 16:33:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:33:01,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:33:01,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:33:01,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:33:03,140 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 8 [2020-07-20 16:33:05,201 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 16:33:05,208 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:33:05,208 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 16:33:05,208 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 16:33:05,208 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 16:33:05,209 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (or (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6)) (and (<= 2 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 4)) (and (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7)) (and (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|)) (and (< |fibonacci_#in~n| 9) (<= 13 |fibonacci_#t~ret0|)) (<= |fibonacci_#in~n| 3) (<= 21 |fibonacci_#t~ret0|)) (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 16:33:05,209 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:33:05,209 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-20 16:33:05,209 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-20 16:33:05,209 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-20 16:33:05,209 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,210 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,210 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,210 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,210 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:33:05,210 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:33:05,210 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-20 16:33:05,210 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-20 16:33:05,210 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-20 16:33:05,211 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-20 16:33:05,211 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-20 16:33:05,211 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-20 16:33:05,211 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-20 16:33:05,211 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-20 16:33:05,211 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-20 16:33:05,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:33:05 BoogieIcfgContainer [2020-07-20 16:33:05,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:33:05,219 INFO L168 Benchmark]: Toolchain (without parser) took 198986.33 ms. Allocated memory was 140.5 MB in the beginning and 891.8 MB in the end (delta: 751.3 MB). Free memory was 103.5 MB in the beginning and 759.5 MB in the end (delta: -656.0 MB). Peak memory consumption was 833.2 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,219 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 16:33:05,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.70 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,219 INFO L168 Benchmark]: Boogie Preprocessor took 25.00 ms. Allocated memory is still 140.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,220 INFO L168 Benchmark]: RCFGBuilder took 356.49 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 169.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,220 INFO L168 Benchmark]: TraceAbstraction took 198355.91 ms. Allocated memory was 202.9 MB in the beginning and 891.8 MB in the end (delta: 688.9 MB). Free memory was 169.5 MB in the beginning and 759.5 MB in the end (delta: -590.0 MB). Peak memory consumption was 836.9 MB. Max. memory is 7.1 GB. [2020-07-20 16:33:05,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.70 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.00 ms. Allocated memory is still 140.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.49 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 169.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 198355.91 ms. Allocated memory was 202.9 MB in the beginning and 891.8 MB in the end (delta: 688.9 MB). Free memory was 169.5 MB in the beginning and 759.5 MB in the end (delta: -590.0 MB). Peak memory consumption was 836.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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: 194.7s, OverallIterations: 14, TraceHistogramMax: 151, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 387 SDtfs, 1941 SDslu, 2097 SDs, 0 SdLazy, 3096 SolverSat, 2708 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8228 GetRequests, 7458 SyntacticMatches, 341 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7771 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=13, 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, 14 MinimizatonAttempts, 96 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 320 PreInvPairs, 427 NumberOfFragments, 71 HoareAnnotationTreeSize, 320 FomulaSimplifications, 1419 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3543 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 180.4s InterpolantComputationTime, 4042 NumberOfCodeBlocks, 2315 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 8029 ConstructedInterpolants, 0 QuantifiedInterpolants, 8308925 SizeOfPredicates, 113 NumberOfNonLiveVariables, 6591 ConjunctsInSsa, 424 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 260104/307770 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...