/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:09,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:09,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:09,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:09,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:09,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:09,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:09,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:09,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:09,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:09,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:09,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:09,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:09,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:09,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:09,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:09,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:09,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:09,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:09,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:09,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:09,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:09,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:09,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:09,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:09,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:09,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:09,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:09,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:45:09,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:09,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:09,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:09,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:09,237 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:09,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:09,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:09,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:09,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:09,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:09,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:09,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:09,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:09,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:09,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:09,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:09,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:09,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:09,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:09,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:09,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:09,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:09,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:09,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:09,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:09,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:09,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:09,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:09,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:09,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:09,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:09,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:09,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:09,534 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:09,535 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 15:45:09,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b04dc93/23112900878a442bb29a14ae0ced753a/FLAG6e141b319 [2020-07-21 15:45:10,024 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:10,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 15:45:10,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b04dc93/23112900878a442bb29a14ae0ced753a/FLAG6e141b319 [2020-07-21 15:45:10,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b04dc93/23112900878a442bb29a14ae0ced753a [2020-07-21 15:45:10,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:10,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:10,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:10,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:10,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:10,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c81d34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10, skipping insertion in model container [2020-07-21 15:45:10,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:10,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:10,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:10,691 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:10,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:10,725 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:10,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10 WrapperNode [2020-07-21 15:45:10,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:10,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:10,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:10,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:10,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:10,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:10,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:10,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:10,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:10,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:10,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:10,905 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 15:45:10,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:10,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:10,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:10,905 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 15:45:10,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:11,070 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:11,070 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:11,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:11 BoogieIcfgContainer [2020-07-21 15:45:11,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:11,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:11,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:11,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:11,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:10" (1/3) ... [2020-07-21 15:45:11,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad7f9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:11, skipping insertion in model container [2020-07-21 15:45:11,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (2/3) ... [2020-07-21 15:45:11,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad7f9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:11, skipping insertion in model container [2020-07-21 15:45:11,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:11" (3/3) ... [2020-07-21 15:45:11,083 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 15:45:11,094 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:11,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:11,116 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:11,140 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:11,140 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:11,140 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:11,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:11,141 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:11,141 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:11,141 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:11,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 15:45:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:45:11,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,168 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 15:45:11,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216319076] [2020-07-21 15:45:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,251 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:11,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:11,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:11,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216319076] [2020-07-21 15:45:11,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:11,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:11,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686018760] [2020-07-21 15:45:11,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:11,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:11,441 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 15:45:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:11,531 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 15:45:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:11,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:45:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:11,544 INFO L225 Difference]: With dead ends: 33 [2020-07-21 15:45:11,544 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 15:45:11,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 15:45:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 15:45:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:45:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:45:11,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 15:45:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:11,593 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:45:11,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:45:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:11,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 15:45:11,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023654466] [2020-07-21 15:45:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:11,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:11,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:11,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023654466] [2020-07-21 15:45:11,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:11,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:11,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607165388] [2020-07-21 15:45:11,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:11,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:11,869 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 15:45:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:11,927 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 15:45:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:11,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:45:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:11,930 INFO L225 Difference]: With dead ends: 27 [2020-07-21 15:45:11,930 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 15:45:11,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 15:45:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 15:45:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:45:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:45:11,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 15:45:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:11,939 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:45:11,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:45:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:45:11,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:12,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,155 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 15:45:12,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:12,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392356147] [2020-07-21 15:45:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:12,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:12,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:12,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392356147] [2020-07-21 15:45:12,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:12,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:45:12,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010444214] [2020-07-21 15:45:12,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:12,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:12,461 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 15:45:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:12,567 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 15:45:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:12,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 15:45:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:12,570 INFO L225 Difference]: With dead ends: 32 [2020-07-21 15:45:12,570 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:45:12,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:45:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 15:45:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:45:12,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 15:45:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:12,581 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:45:12,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:45:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:45:12,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:12,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:12,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,797 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:12,798 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 15:45:12,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:12,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532020320] [2020-07-21 15:45:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:45:12,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:13,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:13,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532020320] [2020-07-21 15:45:13,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:13,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:45:13,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444157826] [2020-07-21 15:45:13,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:45:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:45:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:45:13,064 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 15:45:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:13,136 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 15:45:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:13,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 15:45:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:13,139 INFO L225 Difference]: With dead ends: 37 [2020-07-21 15:45:13,139 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:45:13,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:45:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 15:45:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:45:13,149 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 15:45:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:13,149 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:45:13,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:45:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:45:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:45:13,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:13,151 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:13,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:13,365 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 15:45:13,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:13,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425355936] [2020-07-21 15:45:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:13,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:13,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:13,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:13,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:13,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:13,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425355936] [2020-07-21 15:45:13,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:13,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:45:13,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272370486] [2020-07-21 15:45:13,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:13,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:13,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:13,777 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 15:45:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:13,916 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 15:45:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:13,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 15:45:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:13,920 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:45:13,920 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 15:45:13,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 15:45:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 15:45:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:45:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:45:13,938 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 15:45:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:13,939 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:45:13,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:45:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:45:13,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:13,943 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:14,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,155 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 15:45:14,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:14,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315640255] [2020-07-21 15:45:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 15:45:14,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:14,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:14,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315640255] [2020-07-21 15:45:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:14,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:45:14,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060235] [2020-07-21 15:45:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:14,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:14,566 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 15:45:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:14,741 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 15:45:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:14,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 15:45:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:14,747 INFO L225 Difference]: With dead ends: 47 [2020-07-21 15:45:14,747 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 15:45:14,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 15:45:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 15:45:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:45:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:45:14,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 15:45:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:14,760 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:45:14,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:45:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 15:45:14,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:14,762 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:14,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,964 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 15:45:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:14,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700761134] [2020-07-21 15:45:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:15,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 15:45:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:15,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 15:45:15,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700761134] [2020-07-21 15:45:15,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:15,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:45:15,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928629587] [2020-07-21 15:45:15,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:15,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:15,674 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 15:45:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:15,830 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 15:45:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:15,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 15:45:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:15,833 INFO L225 Difference]: With dead ends: 52 [2020-07-21 15:45:15,833 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 15:45:15,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 15:45:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 15:45:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 15:45:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 15:45:15,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 15:45:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:15,847 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 15:45:15,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 15:45:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 15:45:15,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:15,849 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] [2020-07-21 15:45:16,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,063 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 15:45:16,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:16,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367258833] [2020-07-21 15:45:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:45:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 120 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-21 15:45:16,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:16,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-21 15:45:17,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367258833] [2020-07-21 15:45:17,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:17,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 15:45:17,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512442949] [2020-07-21 15:45:17,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:17,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:17,065 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 17 states. [2020-07-21 15:45:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:17,461 INFO L93 Difference]: Finished difference Result 79 states and 149 transitions. [2020-07-21 15:45:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:45:17,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-21 15:45:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:17,463 INFO L225 Difference]: With dead ends: 79 [2020-07-21 15:45:17,463 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 15:45:17,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:45:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 15:45:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-07-21 15:45:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 15:45:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-07-21 15:45:17,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 82 [2020-07-21 15:45:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:17,474 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-07-21 15:45:17,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-07-21 15:45:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:45:17,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:17,476 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] [2020-07-21 15:45:17,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:17,689 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 4 times [2020-07-21 15:45:17,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:17,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502633942] [2020-07-21 15:45:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:17,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:17,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 15:45:17,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:18,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:18,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:18,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:18,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 15:45:18,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502633942] [2020-07-21 15:45:18,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:18,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:45:18,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141049935] [2020-07-21 15:45:18,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:18,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:18,343 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 13 states. [2020-07-21 15:45:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:18,491 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-07-21 15:45:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:18,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-21 15:45:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:18,494 INFO L225 Difference]: With dead ends: 53 [2020-07-21 15:45:18,494 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 15:45:18,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 15:45:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-21 15:45:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 15:45:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-07-21 15:45:18,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 68 [2020-07-21 15:45:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:18,503 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-07-21 15:45:18,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-07-21 15:45:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-21 15:45:18,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:18,506 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:18,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:18,720 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1558928088, now seen corresponding path program 5 times [2020-07-21 15:45:18,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:18,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360293550] [2020-07-21 15:45:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:18,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:18,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:45:18,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 276 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-07-21 15:45:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:19,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:19,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:19,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:19,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 306 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 15:45:20,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360293550] [2020-07-21 15:45:20,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:20,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 15:45:20,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629282858] [2020-07-21 15:45:20,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:45:20,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:20,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:45:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:45:20,376 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 21 states. [2020-07-21 15:45:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:20,885 INFO L93 Difference]: Finished difference Result 109 states and 162 transitions. [2020-07-21 15:45:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:45:20,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-07-21 15:45:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:20,891 INFO L225 Difference]: With dead ends: 109 [2020-07-21 15:45:20,892 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 15:45:20,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 209 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:45:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 15:45:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-21 15:45:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:45:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 15:45:20,918 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 123 [2020-07-21 15:45:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:20,919 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 15:45:20,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:45:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 15:45:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 15:45:20,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:20,923 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:21,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:21,136 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 6 times [2020-07-21 15:45:21,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:21,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347788993] [2020-07-21 15:45:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:21,207 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:45:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 15:45:21,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:21,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:21,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 15:45:22,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347788993] [2020-07-21 15:45:22,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:22,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 15:45:22,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624796410] [2020-07-21 15:45:22,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:45:22,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:45:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:22,183 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-21 15:45:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:22,369 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-21 15:45:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:22,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-21 15:45:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:22,373 INFO L225 Difference]: With dead ends: 68 [2020-07-21 15:45:22,373 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:45:22,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:45:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:45:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 15:45:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 15:45:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 15:45:22,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-21 15:45:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:22,388 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 15:45:22,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:45:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 15:45:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 15:45:22,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:22,391 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:22,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:22,605 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1442326180, now seen corresponding path program 7 times [2020-07-21 15:45:22,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:22,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147226453] [2020-07-21 15:45:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:22,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:45:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-21 15:45:22,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:23,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-21 15:45:24,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147226453] [2020-07-21 15:45:24,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:24,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 15:45:24,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752590513] [2020-07-21 15:45:24,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:24,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:24,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:24,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:24,324 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 17 states. [2020-07-21 15:45:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:24,583 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2020-07-21 15:45:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:45:24,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-07-21 15:45:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:24,585 INFO L225 Difference]: With dead ends: 73 [2020-07-21 15:45:24,585 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 15:45:24,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:45:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 15:45:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 15:45:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 15:45:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2020-07-21 15:45:24,594 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 177 [2020-07-21 15:45:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:24,594 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2020-07-21 15:45:24,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2020-07-21 15:45:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 15:45:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:24,599 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] [2020-07-21 15:45:24,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:24,814 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2107730799, now seen corresponding path program 8 times [2020-07-21 15:45:24,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:24,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290706526] [2020-07-21 15:45:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:24,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:45:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 3187 proven. 839 refuted. 0 times theorem prover too weak. 2013 trivial. 0 not checked. [2020-07-21 15:45:25,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:27,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 632 proven. 1750 refuted. 0 times theorem prover too weak. 3657 trivial. 0 not checked. [2020-07-21 15:45:28,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290706526] [2020-07-21 15:45:28,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:28,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:45:28,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745510324] [2020-07-21 15:45:28,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:45:28,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:45:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:45:28,473 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand 25 states. [2020-07-21 15:45:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:29,260 INFO L93 Difference]: Finished difference Result 149 states and 239 transitions. [2020-07-21 15:45:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 15:45:29,261 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 327 [2020-07-21 15:45:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:29,263 INFO L225 Difference]: With dead ends: 149 [2020-07-21 15:45:29,263 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 15:45:29,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 609 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:45:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 15:45:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-07-21 15:45:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 15:45:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-21 15:45:29,274 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 327 [2020-07-21 15:45:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:29,275 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-21 15:45:29,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:45:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-21 15:45:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 15:45:29,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:29,279 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] [2020-07-21 15:45:29,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:29,495 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -902141708, now seen corresponding path program 9 times [2020-07-21 15:45:29,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:29,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468127520] [2020-07-21 15:45:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:29,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:45:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-21 15:45:29,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:31,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:31,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:31,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-21 15:45:32,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468127520] [2020-07-21 15:45:32,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:32,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 15:45:32,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191075722] [2020-07-21 15:45:32,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:45:32,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:45:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:32,354 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 19 states. [2020-07-21 15:45:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:32,638 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2020-07-21 15:45:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:32,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 286 [2020-07-21 15:45:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:32,642 INFO L225 Difference]: With dead ends: 90 [2020-07-21 15:45:32,642 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 15:45:32,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:45:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 15:45:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 15:45:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 15:45:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-21 15:45:32,651 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 286 [2020-07-21 15:45:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:32,652 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-21 15:45:32,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:45:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-21 15:45:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 15:45:32,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:32,657 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:32,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:32,859 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:32,860 INFO L82 PathProgramCache]: Analyzing trace with hash 15696592, now seen corresponding path program 10 times [2020-07-21 15:45:32,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:32,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550052860] [2020-07-21 15:45:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:33,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:33,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 15:45:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1939 proven. 3340 refuted. 0 times theorem prover too weak. 11128 trivial. 0 not checked. [2020-07-21 15:45:33,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:36,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:36,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:37,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:37,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:37,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:37,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:38,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:38,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1939 proven. 3454 refuted. 0 times theorem prover too weak. 11014 trivial. 0 not checked. [2020-07-21 15:45:39,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550052860] [2020-07-21 15:45:39,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:39,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 15:45:39,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312417995] [2020-07-21 15:45:39,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:45:39,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:45:39,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:45:39,918 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 33 states. [2020-07-21 15:45:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:41,325 INFO L93 Difference]: Finished difference Result 215 states and 403 transitions. [2020-07-21 15:45:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 15:45:41,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 531 [2020-07-21 15:45:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:41,328 INFO L225 Difference]: With dead ends: 215 [2020-07-21 15:45:41,328 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 15:45:41,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1001 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-21 15:45:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 15:45:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-07-21 15:45:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 15:45:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2020-07-21 15:45:41,342 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 531 [2020-07-21 15:45:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:41,343 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2020-07-21 15:45:41,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:45:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2020-07-21 15:45:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 15:45:41,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:41,347 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:41,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:41,554 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash -768599631, now seen corresponding path program 11 times [2020-07-21 15:45:41,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:41,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830778962] [2020-07-21 15:45:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:41,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:41,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:41,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:45:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 15:45:42,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:44,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:45,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:46,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:46,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:46,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:46,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 15:45:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830778962] [2020-07-21 15:45:46,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:46,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 15:45:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258306454] [2020-07-21 15:45:46,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 15:45:46,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 15:45:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:45:46,417 INFO L87 Difference]: Start difference. First operand 112 states and 157 transitions. Second operand 20 states. [2020-07-21 15:45:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:46,774 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2020-07-21 15:45:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:45:46,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 463 [2020-07-21 15:45:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:46,779 INFO L225 Difference]: With dead ends: 119 [2020-07-21 15:45:46,780 INFO L226 Difference]: Without dead ends: 115 [2020-07-21 15:45:46,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 15:45:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-21 15:45:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-07-21 15:45:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-21 15:45:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 164 transitions. [2020-07-21 15:45:46,798 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 164 transitions. Word has length 463 [2020-07-21 15:45:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:46,799 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 164 transitions. [2020-07-21 15:45:46,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 15:45:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 164 transitions. [2020-07-21 15:45:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2020-07-21 15:45:46,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:46,814 INFO L422 BasicCegarLoop]: trace histogram [173, 173, 140, 86, 86, 86, 86, 86, 86, 86, 54, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:47,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:47,028 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2050473472, now seen corresponding path program 12 times [2020-07-21 15:45:47,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:47,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976896196] [2020-07-21 15:45:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:47,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-21 15:45:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 83862 backedges. 5718 proven. 11557 refuted. 0 times theorem prover too weak. 66587 trivial. 0 not checked. [2020-07-21 15:45:48,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:55,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:56,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:59,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:59,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:00,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:01,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:03,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:03,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:04,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:05,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 83862 backedges. 5718 proven. 11789 refuted. 0 times theorem prover too weak. 66355 trivial. 0 not checked. [2020-07-21 15:46:06,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976896196] [2020-07-21 15:46:06,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:06,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41] total 45 [2020-07-21 15:46:06,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434980015] [2020-07-21 15:46:06,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 15:46:06,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 15:46:06,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 15:46:06,251 INFO L87 Difference]: Start difference. First operand 115 states and 164 transitions. Second operand 45 states. [2020-07-21 15:46:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:10,965 INFO L93 Difference]: Finished difference Result 335 states and 760 transitions. [2020-07-21 15:46:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-21 15:46:10,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 1185 [2020-07-21 15:46:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:10,973 INFO L225 Difference]: With dead ends: 335 [2020-07-21 15:46:10,973 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 15:46:10,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2418 GetRequests, 2289 SyntacticMatches, 37 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2087, Invalid=6655, Unknown=0, NotChecked=0, Total=8742 [2020-07-21 15:46:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 15:46:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 170. [2020-07-21 15:46:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 15:46:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 270 transitions. [2020-07-21 15:46:10,997 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 270 transitions. Word has length 1185 [2020-07-21 15:46:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:10,998 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 270 transitions. [2020-07-21 15:46:10,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 15:46:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 270 transitions. [2020-07-21 15:46:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 15:46:11,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:11,004 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] [2020-07-21 15:46:11,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:11,205 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 13 times [2020-07-21 15:46:11,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:11,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291219195] [2020-07-21 15:46:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:11,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:11,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 15:46:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 15:46:12,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 15:46:24,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291219195] [2020-07-21 15:46:24,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:24,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 15:46:24,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277907890] [2020-07-21 15:46:24,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 15:46:24,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 15:46:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 15:46:24,473 INFO L87 Difference]: Start difference. First operand 170 states and 270 transitions. Second operand 36 states. [2020-07-21 15:46:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:24,987 INFO L93 Difference]: Finished difference Result 174 states and 273 transitions. [2020-07-21 15:46:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 15:46:24,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 15:46:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:24,993 INFO L225 Difference]: With dead ends: 174 [2020-07-21 15:46:24,994 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 15:46:24,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 15:46:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 15:46:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-07-21 15:46:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 15:46:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 269 transitions. [2020-07-21 15:46:25,009 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 269 transitions. Word has length 749 [2020-07-21 15:46:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:25,010 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 269 transitions. [2020-07-21 15:46:25,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 15:46:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 269 transitions. [2020-07-21 15:46:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 15:46:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:25,023 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:25,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:25,237 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash -655445274, now seen corresponding path program 14 times [2020-07-21 15:46:25,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:25,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777871089] [2020-07-21 15:46:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:25,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:46:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1362 proven. 8020 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2020-07-21 15:46:26,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:31,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:31,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:33,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:35,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:35,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:36,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:37,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:37,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:37,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:46:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1362 proven. 8146 refuted. 0 times theorem prover too weak. 78261 trivial. 0 not checked. [2020-07-21 15:46:37,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777871089] [2020-07-21 15:46:37,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:37,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-21 15:46:37,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339529645] [2020-07-21 15:46:37,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 15:46:37,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 15:46:37,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-21 15:46:37,708 INFO L87 Difference]: Start difference. First operand 170 states and 269 transitions. Second operand 24 states. [2020-07-21 15:46:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:38,092 INFO L93 Difference]: Finished difference Result 170 states and 269 transitions. [2020-07-21 15:46:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 15:46:38,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1212 [2020-07-21 15:46:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:38,096 INFO L225 Difference]: With dead ends: 170 [2020-07-21 15:46:38,096 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:46:38,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2380 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 15:46:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:46:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:46:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:46:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:46:38,099 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2020-07-21 15:46:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:38,100 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:46:38,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 15:46:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:46:38,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:46:38,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:38,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:46:39,333 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 8 [2020-07-21 15:46:40,637 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 152 DAG size of output: 55 [2020-07-21 15:46:40,641 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:46:40,641 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 15:46:40,641 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|)) [2020-07-21 15:46:40,641 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse6 (<= |fibonacci_#in~n| 5)) (.cse7 (<= 5 |fibonacci_#in~n|))) (let ((.cse0 (<= 7 |fibonacci_#in~n|)) (.cse1 (and .cse6 (= 3 |fibonacci_#t~ret0|) .cse7)) (.cse2 (not .cse7)) (.cse4 (<= 4 |fibonacci_#in~n|))) (and (or (not .cse0) (not (<= |fibonacci_#in~n| 7)) (= 8 |fibonacci_#t~ret0|)) (or .cse1 .cse2 (= 5 |fibonacci_#t~ret0|) .cse0) (let ((.cse3 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse5 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse3 .cse4 .cse5) (and (= 1 |fibonacci_#t~ret0|) .cse3 (<= 2 |fibonacci_#in~n|) .cse5))) (or (and (= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 8)) (and (<= 9 |fibonacci_#in~n|) (= 21 |fibonacci_#t~ret0|)) (not (<= 8 |fibonacci_#in~n|)) (<= 10 |fibonacci_#in~n|)) (or (not .cse6) .cse1 .cse2) (or (= 2 |fibonacci_#t~ret0|) (not (<= |fibonacci_#in~n| 4)) (not .cse4))))) [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:46:40,642 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:46:40,642 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2020-07-21 15:46:40,643 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-21 15:46:40,643 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-21 15:46:40,643 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2020-07-21 15:46:40,643 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 15:46:40,643 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 9) (<= 9 main_~x~0)) [2020-07-21 15:46:40,643 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-21 15:46:40,643 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2020-07-21 15:46:40,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:46:40 BoogieIcfgContainer [2020-07-21 15:46:40,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:46:40,649 INFO L168 Benchmark]: Toolchain (without parser) took 90234.91 ms. Allocated memory was 137.9 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 102.8 MB in the beginning and 971.0 MB in the end (delta: -868.2 MB). Peak memory consumption was 297.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,650 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.92 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,651 INFO L168 Benchmark]: Boogie Preprocessor took 30.74 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,652 INFO L168 Benchmark]: RCFGBuilder took 316.11 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 169.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,652 INFO L168 Benchmark]: TraceAbstraction took 89572.36 ms. Allocated memory was 201.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 169.5 MB in the beginning and 971.0 MB in the end (delta: -801.5 MB). Peak memory consumption was 300.6 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:40,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.92 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.74 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.11 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 169.5 MB in the end (delta: -77.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 89572.36 ms. Allocated memory was 201.9 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 169.5 MB in the beginning and 971.0 MB in the end (delta: -801.5 MB). Peak memory consumption was 300.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 87.2s, OverallIterations: 19, TraceHistogramMax: 177, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 462 SDtfs, 2663 SDslu, 2896 SDs, 0 SdLazy, 4177 SolverSat, 5087 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11225 GetRequests, 10502 SyntacticMatches, 228 SemanticMatches, 495 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=17, 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, 19 MinimizatonAttempts, 140 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 269 PreInvPairs, 458 NumberOfFragments, 133 HoareAnnotationTreeSize, 269 FomulaSimplifications, 3224 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5904 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 68.6s InterpolantComputationTime, 5537 NumberOfCodeBlocks, 4415 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 11011 ConstructedInterpolants, 0 QuantifiedInterpolants, 12061873 SizeOfPredicates, 136 NumberOfNonLiveVariables, 10693 ConjunctsInSsa, 701 ConjunctsInUnsatCore, 36 InterpolantComputations, 2 PerfectInterpolantSequences, 415213/495756 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...