/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:50:34,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:50:34,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:50:34,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 00:50:34,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:50:34,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:50:34,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:50:34,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:50:34,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:50:34,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:50:34,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:50:34,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:50:34,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:50:34,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:50:34,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:50:34,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:50:34,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:50:34,324 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 00:50:34,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:50:34,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:50:34,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:50:34,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:50:34,365 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:50:34,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:50:34,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:50:34,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:50:34,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:50:34,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:50:34,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:50:34,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:50:34,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:50:34,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:50:34,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:50:34,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:50:34,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:50:34,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:50:34,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:50:34,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:50:34,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:50:34,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:34,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:50:34,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:50:34,370 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:50:34,725 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:50:34,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:50:34,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:50:34,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:50:34,746 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:50:34,747 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-21 00:50:34,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451496fd6/9114e09854f0432f98afbb82f1b650bb/FLAGda53c5a30 [2020-07-21 00:50:35,334 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:50:35,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-21 00:50:35,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451496fd6/9114e09854f0432f98afbb82f1b650bb/FLAGda53c5a30 [2020-07-21 00:50:35,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451496fd6/9114e09854f0432f98afbb82f1b650bb [2020-07-21 00:50:35,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:50:35,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:50:35,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:50:35,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:50:35,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:50:35,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60db9828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35, skipping insertion in model container [2020-07-21 00:50:35,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:50:35,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:50:35,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:50:35,880 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:50:35,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:50:35,907 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:50:35,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35 WrapperNode [2020-07-21 00:50:35,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:50:35,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:50:35,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:50:35,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:50:35,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (1/1) ... [2020-07-21 00:50:35,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:50:35,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:50:35,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:50:35,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:50:35,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (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 00:50:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:50:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:50:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 00:50:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:50:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:50:36,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:50:36,303 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:50:36,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:50:36 BoogieIcfgContainer [2020-07-21 00:50:36,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:50:36,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:50:36,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:50:36,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:50:36,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:50:35" (1/3) ... [2020-07-21 00:50:36,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775c5243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:50:36, skipping insertion in model container [2020-07-21 00:50:36,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:35" (2/3) ... [2020-07-21 00:50:36,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775c5243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:50:36, skipping insertion in model container [2020-07-21 00:50:36,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:50:36" (3/3) ... [2020-07-21 00:50:36,320 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-07-21 00:50:36,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:50:36,348 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:50:36,365 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:50:36,404 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:50:36,404 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:50:36,404 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:50:36,405 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:50:36,405 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:50:36,405 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:50:36,405 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:50:36,405 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:50:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 00:50:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:50:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:36,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:36,450 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 00:50:36,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:36,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4721581] [2020-07-21 00:50:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:36,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:36,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:50:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:36,686 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 00:50:36,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:50:36,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4721581] [2020-07-21 00:50:36,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:50:36,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:50:36,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904959817] [2020-07-21 00:50:36,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:50:36,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:50:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:50:36,717 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 00:50:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:36,834 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 00:50:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:50:36,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:50:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:36,849 INFO L225 Difference]: With dead ends: 35 [2020-07-21 00:50:36,849 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 00:50:36,853 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 00:50:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 00:50:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 00:50:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:50:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:50:36,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 00:50:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:36,904 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:50:36,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:50:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:50:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:50:36,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:36,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:37,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:37,123 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 00:50:37,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:37,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377648762] [2020-07-21 00:50:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:37,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:50:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:37,205 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 00:50:37,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:50:37,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377648762] [2020-07-21 00:50:37,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:50:37,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:50:37,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533733750] [2020-07-21 00:50:37,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:50:37,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:50:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:50:37,211 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 00:50:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:37,279 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 00:50:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:50:37,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:50:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:37,283 INFO L225 Difference]: With dead ends: 27 [2020-07-21 00:50:37,283 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 00:50:37,285 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 00:50:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 00:50:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 00:50:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:50:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:50:37,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 00:50:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:37,295 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:50:37,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:50:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:50:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:50:37,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:37,298 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 00:50:37,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:37,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 00:50:37,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:37,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114413168] [2020-07-21 00:50:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:37,552 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:37,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:50:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:37,614 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 00:50:37,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:37,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:37,834 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 00:50:37,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114413168] [2020-07-21 00:50:37,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:37,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:50:37,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853751739] [2020-07-21 00:50:37,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:50:37,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:50:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:50:37,838 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 00:50:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:37,956 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 00:50:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:50:37,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 00:50:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:37,959 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:50:37,959 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:50:37,960 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 00:50:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:50:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:50:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:50:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:50:37,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 00:50:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:37,970 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:50:37,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:50:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:50:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:50:37,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:37,972 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 00:50:38,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:38,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 00:50:38,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:38,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382894453] [2020-07-21 00:50:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 00:50:38,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:38,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:50:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:38,276 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 00:50:38,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:38,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:38,449 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 00:50:38,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382894453] [2020-07-21 00:50:38,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:38,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:50:38,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309844701] [2020-07-21 00:50:38,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:50:38,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:50:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:50:38,452 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 00:50:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:38,529 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 00:50:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:50:38,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 00:50:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:38,532 INFO L225 Difference]: With dead ends: 37 [2020-07-21 00:50:38,532 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:50:38,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:50:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 00:50:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:50:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:50:38,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 00:50:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:38,542 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:50:38,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:50:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:50:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:50:38,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:38,545 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 00:50:38,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:38,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 00:50:38,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:38,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153949885] [2020-07-21 00:50:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:38,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:50:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:38,829 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 00:50:38,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:39,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:39,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:39,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:39,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:39,213 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 00:50:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153949885] [2020-07-21 00:50:39,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:39,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:50:39,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286488030] [2020-07-21 00:50:39,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:50:39,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:50:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:39,220 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 00:50:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:39,423 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 00:50:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:50:39,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 00:50:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:39,426 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:50:39,426 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:50:39,427 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 00:50:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:50:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 00:50:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:50:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:50:39,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 00:50:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:39,439 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:50:39,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:50:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:50:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 00:50:39,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:39,441 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 00:50:39,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:39,653 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 00:50:39,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:39,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416973445] [2020-07-21 00:50:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:39,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:39,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:39,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:50:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:39,739 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 00:50:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:39,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:40,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:40,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:40,044 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 00:50:40,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416973445] [2020-07-21 00:50:40,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:40,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:50:40,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964407130] [2020-07-21 00:50:40,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:50:40,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:50:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:40,047 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 00:50:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:40,159 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 00:50:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:50:40,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 00:50:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:40,162 INFO L225 Difference]: With dead ends: 47 [2020-07-21 00:50:40,162 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 00:50:40,163 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 00:50:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 00:50:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 00:50:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:50:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:50:40,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 00:50:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:40,175 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:50:40,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:50:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:50:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 00:50:40,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:40,178 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 00:50:40,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:40,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:40,393 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 00:50:40,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:40,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78343347] [2020-07-21 00:50:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:40,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:40,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:50:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:40,508 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 00:50:40,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:40,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:41,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:41,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:41,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:41,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:41,106 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 00:50:41,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78343347] [2020-07-21 00:50:41,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:41,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:50:41,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528426196] [2020-07-21 00:50:41,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:50:41,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:50:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:50:41,113 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 00:50:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:41,338 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 00:50:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:50:41,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 00:50:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:41,343 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:50:41,343 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 00:50:41,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 00:50:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 00:50:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:50:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:50:41,374 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 00:50:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:41,376 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:50:41,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:50:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:50:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 00:50:41,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:41,386 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:41,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:41,599 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 00:50:41,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:41,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910758049] [2020-07-21 00:50:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:41,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:50:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 00:50:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:42,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:42,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:42,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:42,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 00:50:42,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910758049] [2020-07-21 00:50:42,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:42,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 00:50:42,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670429313] [2020-07-21 00:50:42,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:50:42,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:50:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:50:42,384 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 12 states. [2020-07-21 00:50:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:42,506 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 00:50:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:50:42,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-07-21 00:50:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:42,511 INFO L225 Difference]: With dead ends: 57 [2020-07-21 00:50:42,512 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 00:50:42,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:50:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 00:50:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 00:50:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:50:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:50:42,526 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 00:50:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:42,527 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:50:42,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:50:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:50:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 00:50:42,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:42,529 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:42,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:42,744 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 00:50:42,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:42,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700178572] [2020-07-21 00:50:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:42,795 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:42,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 00:50:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:43,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 00:50:43,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700178572] [2020-07-21 00:50:43,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:43,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 00:50:43,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922863026] [2020-07-21 00:50:43,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:50:43,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:50:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:50:43,882 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 14 states. [2020-07-21 00:50:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:44,144 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 00:50:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:50:44,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 117 [2020-07-21 00:50:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:44,148 INFO L225 Difference]: With dead ends: 62 [2020-07-21 00:50:44,149 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 00:50:44,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 00:50:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 00:50:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:50:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:50:44,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 00:50:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:44,165 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:50:44,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:50:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:50:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 00:50:44,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:44,168 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:44,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:44,384 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:44,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 00:50:44,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:44,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468715814] [2020-07-21 00:50:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:44,464 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 221 proven. 407 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-07-21 00:50:44,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:45,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 223 proven. 427 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-07-21 00:50:45,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468715814] [2020-07-21 00:50:45,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:45,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 00:50:45,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156196745] [2020-07-21 00:50:45,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:50:45,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:45,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:50:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:50:45,731 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 14 states. [2020-07-21 00:50:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:45,930 INFO L93 Difference]: Finished difference Result 88 states and 260 transitions. [2020-07-21 00:50:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:50:45,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 190 [2020-07-21 00:50:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:45,933 INFO L225 Difference]: With dead ends: 88 [2020-07-21 00:50:45,933 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 00:50:45,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 00:50:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-21 00:50:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 00:50:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2020-07-21 00:50:45,962 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 190 [2020-07-21 00:50:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:45,963 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 70 transitions. [2020-07-21 00:50:45,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:50:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 70 transitions. [2020-07-21 00:50:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-21 00:50:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:45,981 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:46,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:46,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-07-21 00:50:46,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:46,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309514721] [2020-07-21 00:50:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:46,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-21 00:50:46,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:46,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 130 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-07-21 00:50:47,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309514721] [2020-07-21 00:50:47,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:47,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 00:50:47,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114345299] [2020-07-21 00:50:47,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:50:47,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:50:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:50:47,373 INFO L87 Difference]: Start difference. First operand 49 states and 70 transitions. Second operand 14 states. [2020-07-21 00:50:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:47,565 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-07-21 00:50:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:50:47,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2020-07-21 00:50:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:47,569 INFO L225 Difference]: With dead ends: 67 [2020-07-21 00:50:47,569 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 00:50:47,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 248 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 00:50:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-21 00:50:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 00:50:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-07-21 00:50:47,599 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 136 [2020-07-21 00:50:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:47,600 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-07-21 00:50:47,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:50:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-07-21 00:50:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 00:50:47,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:47,607 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 00:50:47,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:47,821 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-07-21 00:50:47,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:47,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207465888] [2020-07-21 00:50:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:47,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:50:47,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 00:50:47,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:50:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 00:50:47,929 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:50:47,957 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 00:50:47,957 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 00:50:48,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:48,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:50:48 BoogieIcfgContainer [2020-07-21 00:50:48,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:50:48,216 INFO L168 Benchmark]: Toolchain (without parser) took 12543.40 ms. Allocated memory was 137.9 MB in the beginning and 331.9 MB in the end (delta: 194.0 MB). Free memory was 102.4 MB in the beginning and 212.1 MB in the end (delta: -109.7 MB). Peak memory consumption was 84.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,218 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.09 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,219 INFO L168 Benchmark]: Boogie Preprocessor took 27.63 ms. Allocated memory is still 137.9 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,220 INFO L168 Benchmark]: RCFGBuilder took 372.60 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.0 MB in the beginning and 170.4 MB in the end (delta: -79.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,221 INFO L168 Benchmark]: TraceAbstraction took 11903.14 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 169.7 MB in the beginning and 212.1 MB in the end (delta: -42.4 MB). Peak memory consumption was 87.1 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:48,225 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.09 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.63 ms. Allocated memory is still 137.9 MB. Free memory was 92.4 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.60 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.0 MB in the beginning and 170.4 MB in the end (delta: -79.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11903.14 ms. Allocated memory was 202.4 MB in the beginning and 331.9 MB in the end (delta: 129.5 MB). Free memory was 169.7 MB in the beginning and 212.1 MB in the end (delta: -42.4 MB). Peak memory consumption was 87.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.7s, OverallIterations: 12, TraceHistogramMax: 27, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 194 SDtfs, 338 SDslu, 656 SDs, 0 SdLazy, 716 SolverSat, 367 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1534 GetRequests, 1334 SyntacticMatches, 70 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 82 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 873 NumberOfCodeBlocks, 485 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1481 ConstructedInterpolants, 0 QuantifiedInterpolants, 300571 SizeOfPredicates, 46 NumberOfNonLiveVariables, 849 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 6300/8528 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 incorrect! Received shutdown request...