/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:29:19,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:29:19,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:29:19,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:29:19,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:29:19,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:29:19,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:29:19,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:29:19,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:29:19,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:29:19,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:29:19,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:29:19,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:29:19,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:29:19,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:29:19,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:29:19,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:29:19,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:29:19,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:29:19,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:29:19,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:29:19,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:29:19,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:29:19,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:29:19,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:29:19,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:29:19,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:29:19,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:29:19,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:29:19,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:29:19,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:29:19,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:29:19,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:29:19,490 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:29:19,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:29:19,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:29:19,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:29:19,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:29:19,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:29:19,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:29:19,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:29:19,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:29:19,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:29:19,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:29:19,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:29:19,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:29:19,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:29:19,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:29:19,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:29:19,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:29:19,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:29:19,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:29:19,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:29:19,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:29:19,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:29:19,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:19,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:29:19,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:29:19,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:29:19,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:29:19,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:29:19,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:29:19,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:29:19,804 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:29:19,806 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-20 16:29:19,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03d84b2b/8bf8d2c53ef04baf8076db389f1081a9/FLAG1d61b9276 [2020-07-20 16:29:20,318 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:29:20,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-20 16:29:20,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03d84b2b/8bf8d2c53ef04baf8076db389f1081a9/FLAG1d61b9276 [2020-07-20 16:29:20,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03d84b2b/8bf8d2c53ef04baf8076db389f1081a9 [2020-07-20 16:29:20,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:29:20,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:29:20,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:20,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:29:20,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:29:20,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53736b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20, skipping insertion in model container [2020-07-20 16:29:20,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:29:20,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:29:20,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:20,905 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:29:20,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:20,931 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:29:20,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20 WrapperNode [2020-07-20 16:29:20,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:20,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:29:20,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:29:20,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:29:20,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... [2020-07-20 16:29:20,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:29:20,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:29:20,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:29:20,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:29:20,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:29:21,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:29:21,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:29:21,110 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 16:29:21,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:29:21,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:29:21,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:29:21,290 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:29:21,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:21 BoogieIcfgContainer [2020-07-20 16:29:21,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:29:21,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:29:21,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:29:21,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:29:21,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:29:20" (1/3) ... [2020-07-20 16:29:21,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b15d2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:21, skipping insertion in model container [2020-07-20 16:29:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:20" (2/3) ... [2020-07-20 16:29:21,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b15d2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:21, skipping insertion in model container [2020-07-20 16:29:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:21" (3/3) ... [2020-07-20 16:29:21,303 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-20 16:29:21,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:29:21,322 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:29:21,337 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:29:21,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:29:21,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:29:21,408 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:29:21,409 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:29:21,409 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:29:21,409 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:29:21,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:29:21,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:29:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 16:29:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:29:21,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:21,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:21,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-20 16:29:21,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:21,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261041876] [2020-07-20 16:29:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:21,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:21,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:21,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:29:21,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:21,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:21,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261041876] [2020-07-20 16:29:21,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:21,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:29:21,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973099421] [2020-07-20 16:29:21,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:29:21,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:29:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:29:21,705 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-20 16:29:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:21,880 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 16:29:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:29:21,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 16:29:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:21,894 INFO L225 Difference]: With dead ends: 36 [2020-07-20 16:29:21,894 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 16:29:21,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:29:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 16:29:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 16:29:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 16:29:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 16:29:21,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-20 16:29:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:21,949 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 16:29:21,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:29:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 16:29:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 16:29:21,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:21,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:22,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-20 16:29:22,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:22,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809161652] [2020-07-20 16:29:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:22,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:22,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 16:29:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:22,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:22,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809161652] [2020-07-20 16:29:22,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:22,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 16:29:22,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480879706] [2020-07-20 16:29:22,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:29:22,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:29:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:29:22,279 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-20 16:29:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:22,376 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-20 16:29:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:29:22,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 16:29:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:22,378 INFO L225 Difference]: With dead ends: 28 [2020-07-20 16:29:22,379 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 16:29:22,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:29:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 16:29:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-20 16:29:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 16:29:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 16:29:22,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-20 16:29:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:22,388 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 16:29:22,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:29:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 16:29:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:29:22,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:22,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:22,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:22,604 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-20 16:29:22,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:22,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297560732] [2020-07-20 16:29:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:22,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:22,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:29:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:29:22,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:23,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:29:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297560732] [2020-07-20 16:29:23,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:23,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-20 16:29:23,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362256139] [2020-07-20 16:29:23,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:29:23,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:23,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:29:23,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:23,155 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2020-07-20 16:29:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:23,355 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-20 16:29:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:29:23,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-07-20 16:29:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:23,357 INFO L225 Difference]: With dead ends: 34 [2020-07-20 16:29:23,358 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 16:29:23,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:29:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 16:29:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 16:29:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 16:29:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-07-20 16:29:23,368 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 27 [2020-07-20 16:29:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:23,369 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-07-20 16:29:23,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:29:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-07-20 16:29:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 16:29:23,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:23,371 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, 1] [2020-07-20 16:29:23,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:23,586 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-20 16:29:23,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:23,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363445133] [2020-07-20 16:29:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:23,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 16:29:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:29:23,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:24,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:29:24,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363445133] [2020-07-20 16:29:24,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:24,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-20 16:29:24,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561160918] [2020-07-20 16:29:24,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:29:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:29:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:24,113 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 17 states. [2020-07-20 16:29:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:24,411 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-07-20 16:29:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:29:24,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-20 16:29:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:24,414 INFO L225 Difference]: With dead ends: 39 [2020-07-20 16:29:24,414 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 16:29:24,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:29:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 16:29:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 16:29:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 16:29:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2020-07-20 16:29:24,427 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 28 [2020-07-20 16:29:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:24,428 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2020-07-20 16:29:24,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:29:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2020-07-20 16:29:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:29:24,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:24,430 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, 1, 1] [2020-07-20 16:29:24,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:24,632 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -928122994, now seen corresponding path program 2 times [2020-07-20 16:29:24,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:24,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869463888] [2020-07-20 16:29:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:24,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:29:24,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:29:24,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:24,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 16:29:25,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869463888] [2020-07-20 16:29:25,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:25,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-20 16:29:25,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595669067] [2020-07-20 16:29:25,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:29:25,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:29:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:29:25,093 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand 13 states. [2020-07-20 16:29:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:25,439 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2020-07-20 16:29:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 16:29:25,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-20 16:29:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:25,442 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:29:25,442 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 16:29:25,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:29:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 16:29:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-20 16:29:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 16:29:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-07-20 16:29:25,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 41 [2020-07-20 16:29:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:25,454 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-07-20 16:29:25,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:29:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-07-20 16:29:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:29:25,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:25,456 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, 1, 1] [2020-07-20 16:29:25,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:25,671 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-07-20 16:29:25,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:25,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929372265] [2020-07-20 16:29:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:25,717 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:29:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:29:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:26,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:26,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 16:29:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929372265] [2020-07-20 16:29:26,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:26,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 16:29:26,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375601958] [2020-07-20 16:29:26,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:29:26,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:26,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:29:26,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:26,075 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 11 states. [2020-07-20 16:29:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:26,223 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-07-20 16:29:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:29:26,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 16:29:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:26,225 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:29:26,225 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 16:29:26,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:29:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 16:29:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-20 16:29:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 16:29:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 16:29:26,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 41 [2020-07-20 16:29:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:26,234 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 16:29:26,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:29:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 16:29:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 16:29:26,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:26,235 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, 1] [2020-07-20 16:29:26,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:26,449 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:26,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-07-20 16:29:26,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:26,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070161008] [2020-07-20 16:29:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:26,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:26,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:26,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 16:29:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:29:26,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:27,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 16:29:27,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070161008] [2020-07-20 16:29:27,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:27,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-07-20 16:29:27,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721507954] [2020-07-20 16:29:27,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:29:27,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:27,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:29:27,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:29:27,352 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 23 states. [2020-07-20 16:29:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:27,749 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-07-20 16:29:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 16:29:27,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-07-20 16:29:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:27,752 INFO L225 Difference]: With dead ends: 53 [2020-07-20 16:29:27,753 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 16:29:27,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:29:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 16:29:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 16:29:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 16:29:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-07-20 16:29:27,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 42 [2020-07-20 16:29:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:27,770 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-07-20 16:29:27,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:29:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-07-20 16:29:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 16:29:27,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:27,774 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, 1] [2020-07-20 16:29:27,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:27,980 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 5 times [2020-07-20 16:29:27,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:27,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78683965] [2020-07-20 16:29:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:28,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:29:28,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-20 16:29:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:28,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:28,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-20 16:29:29,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78683965] [2020-07-20 16:29:29,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:29,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-20 16:29:29,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596786690] [2020-07-20 16:29:29,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:29:29,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:29,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:29:29,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:29:29,347 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 21 states. [2020-07-20 16:29:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:29,945 INFO L93 Difference]: Finished difference Result 115 states and 184 transitions. [2020-07-20 16:29:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:29:29,946 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-20 16:29:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:29,950 INFO L225 Difference]: With dead ends: 115 [2020-07-20 16:29:29,950 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 16:29:29,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:29:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 16:29:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-20 16:29:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 16:29:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-07-20 16:29:29,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 97 [2020-07-20 16:29:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:29,966 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-07-20 16:29:29,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:29:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-07-20 16:29:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 16:29:29,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:29,969 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:30,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:30,173 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 6 times [2020-07-20 16:29:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:30,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711152134] [2020-07-20 16:29:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:30,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-20 16:29:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-20 16:29:30,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:31,744 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 16:29:31,869 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 16:29:32,019 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:29:32,166 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:29:32,838 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 16:29:33,082 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 16:29:33,363 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-20 16:29:33,634 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-20 16:29:35,983 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 16:29:36,115 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 16:29:36,258 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:29:36,398 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 16:29:37,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-20 16:29:40,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711152134] [2020-07-20 16:29:40,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:40,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48 [2020-07-20 16:29:40,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879097725] [2020-07-20 16:29:40,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 16:29:40,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 16:29:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 16:29:40,167 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 48 states. [2020-07-20 16:29:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:41,646 INFO L93 Difference]: Finished difference Result 96 states and 146 transitions. [2020-07-20 16:29:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 16:29:41,647 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178 [2020-07-20 16:29:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:41,649 INFO L225 Difference]: With dead ends: 96 [2020-07-20 16:29:41,649 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:29:41,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 268 SyntacticMatches, 41 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=757, Invalid=4499, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 16:29:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:29:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:29:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:29:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:29:41,653 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2020-07-20 16:29:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:41,653 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:29:41,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 16:29:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:29:41,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:29:41,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:41,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:29:42,297 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 8 [2020-07-20 16:29:42,497 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2020-07-20 16:29:42,501 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:29:42,502 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 16:29:42,502 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 16:29:42,502 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 16:29:42,502 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 5)) .cse1) (and .cse2 (<= 3 fibonacci_~n) (<= |fibonacci_#in~n| 3) .cse1) (and .cse2 .cse0 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1))) [2020-07-20 16:29:42,503 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:29:42,503 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-20 16:29:42,503 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-20 16:29:42,503 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-20 16:29:42,503 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:29:42,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:29:42,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:29:42,504 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:29:42,504 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:29:42,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:29:42,505 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-20 16:29:42,505 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-20 16:29:42,505 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-20 16:29:42,505 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-20 16:29:42,505 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-20 16:29:42,506 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-20 16:29:42,506 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-20 16:29:42,506 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-20 16:29:42,506 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-20 16:29:42,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:29:42 BoogieIcfgContainer [2020-07-20 16:29:42,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:29:42,519 INFO L168 Benchmark]: Toolchain (without parser) took 21865.44 ms. Allocated memory was 138.4 MB in the beginning and 392.7 MB in the end (delta: 254.3 MB). Free memory was 102.2 MB in the beginning and 327.0 MB in the end (delta: -224.8 MB). Peak memory consumption was 253.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,519 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.83 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,529 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 138.4 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,532 INFO L168 Benchmark]: RCFGBuilder took 333.01 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.1 MB in the beginning and 171.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,533 INFO L168 Benchmark]: TraceAbstraction took 21220.80 ms. Allocated memory was 202.9 MB in the beginning and 392.7 MB in the end (delta: 189.8 MB). Free memory was 170.3 MB in the beginning and 327.0 MB in the end (delta: -156.7 MB). Peak memory consumption was 256.6 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:42,540 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.83 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 138.4 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.01 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.1 MB in the beginning and 171.0 MB in the end (delta: -79.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21220.80 ms. Allocated memory was 202.9 MB in the beginning and 392.7 MB in the end (delta: 189.8 MB). Free memory was 170.3 MB in the beginning and 327.0 MB in the end (delta: -156.7 MB). Peak memory consumption was 256.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.4s, OverallIterations: 9, TraceHistogramMax: 25, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 171 SDtfs, 347 SDslu, 963 SDs, 0 SdLazy, 2008 SolverSat, 567 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 714 SyntacticMatches, 82 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=8, 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 89 PreInvPairs, 156 NumberOfFragments, 64 HoareAnnotationTreeSize, 89 FomulaSimplifications, 512 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 940 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 483 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 282750 SizeOfPredicates, 50 NumberOfNonLiveVariables, 886 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2689/4500 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...