/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:08,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:08,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:08,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:08,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:08,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:08,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:08,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:08,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:08,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:08,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:08,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:08,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:08,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:08,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:08,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:08,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:08,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:08,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:08,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:08,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:08,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:08,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:08,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:08,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:08,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:45:08,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:08,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:08,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:08,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:08,511 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:08,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:08,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:08,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:08,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:08,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:08,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:08,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:08,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:08,513 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:08,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:08,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:08,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:08,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:08,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:08,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:08,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:08,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:08,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:08,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:08,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:08,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:08,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:08,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:08,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:08,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:08,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:08,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:08,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:08,827 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:08,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 15:45:08,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cdb26a5f/440cef6a97a0416da1716c97c9aec018/FLAG6d7af58cb [2020-07-21 15:45:09,305 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:09,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 15:45:09,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cdb26a5f/440cef6a97a0416da1716c97c9aec018/FLAG6d7af58cb [2020-07-21 15:45:09,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cdb26a5f/440cef6a97a0416da1716c97c9aec018 [2020-07-21 15:45:09,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:09,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:09,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:09,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:09,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:09,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f41f43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09, skipping insertion in model container [2020-07-21 15:45:09,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:09,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:09,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:09,882 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:09,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:09,912 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:09,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09 WrapperNode [2020-07-21 15:45:09,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:09,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:09,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:09,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:09,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... [2020-07-21 15:45:09,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:09,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:09,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:09,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:09,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 15:45:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 15:45:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:10,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:10,274 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:10,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:10 BoogieIcfgContainer [2020-07-21 15:45:10,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:10,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:10,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:10,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:10,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:09" (1/3) ... [2020-07-21 15:45:10,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4154b413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:10, skipping insertion in model container [2020-07-21 15:45:10,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:09" (2/3) ... [2020-07-21 15:45:10,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4154b413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:10, skipping insertion in model container [2020-07-21 15:45:10,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:10" (3/3) ... [2020-07-21 15:45:10,285 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-21 15:45:10,296 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:10,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:10,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:10,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:10,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:10,341 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:10,341 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:10,341 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:10,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:10,342 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:10,342 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 15:45:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:10,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:10,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:10,368 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 15:45:10,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:10,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959421844] [2020-07-21 15:45:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:10,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:10,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:10,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959421844] [2020-07-21 15:45:10,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:10,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:10,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094582012] [2020-07-21 15:45:10,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:10,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:10,601 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-21 15:45:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:10,761 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 15:45:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:10,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-21 15:45:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:10,774 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:45:10,774 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 15:45:10,778 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 [2020-07-21 15:45:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 15:45:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 15:45:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 15:45:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 15:45:10,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 15:45:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:10,826 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 15:45:10,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 15:45:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:10,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:10,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,045 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 15:45:11,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786296464] [2020-07-21 15:45:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:11,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:11,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786296464] [2020-07-21 15:45:11,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:11,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:11,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300315174] [2020-07-21 15:45:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:11,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:11,167 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-21 15:45:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:11,282 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 15:45:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:11,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 15:45:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:11,284 INFO L225 Difference]: With dead ends: 28 [2020-07-21 15:45:11,285 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 15:45:11,286 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 [2020-07-21 15:45:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 15:45:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 15:45:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 15:45:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 15:45:11,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 15:45:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:11,294 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 15:45:11,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 15:45:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:45:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 15:45:11,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433320796] [2020-07-21 15:45:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 15:45:11,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:11,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:12,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433320796] [2020-07-21 15:45:12,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:12,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 15:45:12,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892513247] [2020-07-21 15:45:12,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:12,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:12,043 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2020-07-21 15:45:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:12,228 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-21 15:45:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:12,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-07-21 15:45:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:12,231 INFO L225 Difference]: With dead ends: 34 [2020-07-21 15:45:12,231 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 15:45:12,232 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 [2020-07-21 15:45:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 15:45:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 15:45:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 15:45:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-07-21 15:45:12,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 27 [2020-07-21 15:45:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:12,241 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-07-21 15:45:12,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-07-21 15:45:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 15:45:12,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:12,244 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] [2020-07-21 15:45:12,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-21 15:45:12,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:12,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531427340] [2020-07-21 15:45:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:45:12,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 15:45:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:12,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 15:45:12,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531427340] [2020-07-21 15:45:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:12,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 15:45:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871314318] [2020-07-21 15:45:12,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:12,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:12,923 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 17 states. [2020-07-21 15:45:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:13,187 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-07-21 15:45:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:45:13,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-21 15:45:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:13,193 INFO L225 Difference]: With dead ends: 39 [2020-07-21 15:45:13,194 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 15:45:13,195 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 [2020-07-21 15:45:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 15:45:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 15:45:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 15:45:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2020-07-21 15:45:13,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 28 [2020-07-21 15:45:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:13,208 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2020-07-21 15:45:13,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2020-07-21 15:45:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:45:13,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:13,210 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] [2020-07-21 15:45:13,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:13,411 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash -928122994, now seen corresponding path program 2 times [2020-07-21 15:45:13,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:13,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133774407] [2020-07-21 15:45:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:13,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:13,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:13,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:13,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 15:45:13,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133774407] [2020-07-21 15:45:13,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:13,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-21 15:45:13,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883355328] [2020-07-21 15:45:13,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:13,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:13,824 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand 13 states. [2020-07-21 15:45:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:14,146 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2020-07-21 15:45:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:45:14,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-21 15:45:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:14,149 INFO L225 Difference]: With dead ends: 74 [2020-07-21 15:45:14,149 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 15:45:14,154 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 [2020-07-21 15:45:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 15:45:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-21 15:45:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 15:45:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-07-21 15:45:14,177 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 41 [2020-07-21 15:45:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:14,177 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-07-21 15:45:14,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-07-21 15:45:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:45:14,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:14,184 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] [2020-07-21 15:45:14,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,385 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-07-21 15:45:14,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:14,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311981085] [2020-07-21 15:45:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:14,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 15:45:14,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:14,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 15:45:14,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311981085] [2020-07-21 15:45:14,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:14,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 15:45:14,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730311616] [2020-07-21 15:45:14,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:14,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:14,746 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 11 states. [2020-07-21 15:45:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:14,890 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-07-21 15:45:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:14,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 15:45:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:14,892 INFO L225 Difference]: With dead ends: 74 [2020-07-21 15:45:14,892 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 15:45:14,893 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 [2020-07-21 15:45:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 15:45:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-21 15:45:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 15:45:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-21 15:45:14,900 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 41 [2020-07-21 15:45:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:14,900 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-21 15:45:14,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-21 15:45:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 15:45:14,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:14,902 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] [2020-07-21 15:45:15,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:15,107 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-07-21 15:45:15,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:15,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756192430] [2020-07-21 15:45:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:15,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:15,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 15:45:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:15,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 15:45:15,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756192430] [2020-07-21 15:45:15,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:15,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-07-21 15:45:15,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932850983] [2020-07-21 15:45:15,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:45:15,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:45:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:45:15,990 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 23 states. [2020-07-21 15:45:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:16,378 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-07-21 15:45:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:45:16,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-07-21 15:45:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:16,380 INFO L225 Difference]: With dead ends: 53 [2020-07-21 15:45:16,380 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 15:45:16,382 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 [2020-07-21 15:45:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 15:45:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-21 15:45:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 15:45:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-07-21 15:45:16,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 42 [2020-07-21 15:45:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:16,390 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-07-21 15:45:16,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:45:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-07-21 15:45:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 15:45:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:16,397 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] [2020-07-21 15:45:16,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,598 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 5 times [2020-07-21 15:45:16,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:16,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867633026] [2020-07-21 15:45:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:16,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:45:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 15:45:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:17,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-21 15:45:17,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867633026] [2020-07-21 15:45:17,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:17,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-21 15:45:17,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884110189] [2020-07-21 15:45:17,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:45:17,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:45:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:45:17,879 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 21 states. [2020-07-21 15:45:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:18,444 INFO L93 Difference]: Finished difference Result 115 states and 184 transitions. [2020-07-21 15:45:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:45:18,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-21 15:45:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:18,448 INFO L225 Difference]: With dead ends: 115 [2020-07-21 15:45:18,448 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 15:45:18,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:45:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 15:45:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-21 15:45:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 15:45:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-07-21 15:45:18,464 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 97 [2020-07-21 15:45:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:18,464 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-07-21 15:45:18,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:45:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-07-21 15:45:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 15:45:18,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:18,468 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] [2020-07-21 15:45:18,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:18,681 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:18,681 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 6 times [2020-07-21 15:45:18,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:18,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984287863] [2020-07-21 15:45:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:18,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-21 15:45:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-21 15:45:19,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:20,207 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:45:20,337 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:45:20,473 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:45:20,602 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:45:21,254 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 15:45:21,487 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 15:45:21,732 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 15:45:22,004 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 15:45:24,231 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:45:24,361 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:45:24,500 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:45:24,633 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:45:25,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:25,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:25,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:26,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:26,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-21 15:45:28,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984287863] [2020-07-21 15:45:28,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:28,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48 [2020-07-21 15:45:28,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349229842] [2020-07-21 15:45:28,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 15:45:28,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 15:45:28,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 15:45:28,204 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 48 states. [2020-07-21 15:45:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:29,642 INFO L93 Difference]: Finished difference Result 96 states and 146 transitions. [2020-07-21 15:45:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 15:45:29,642 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178 [2020-07-21 15:45:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:29,645 INFO L225 Difference]: With dead ends: 96 [2020-07-21 15:45:29,645 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:45:29,648 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 [2020-07-21 15:45:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:45:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:45:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:45:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:45:29,649 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2020-07-21 15:45:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:29,649 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:45:29,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 15:45:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:45:29,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:45:29,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:29,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:45:30,408 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2020-07-21 15:45:30,412 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:45:30,412 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 15:45:30,413 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 15:45:30,413 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 15:45:30,413 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))) [2020-07-21 15:45:30,413 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:45:30,414 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 15:45:30,414 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 15:45:30,414 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 15:45:30,414 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:45:30,414 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:30,414 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:30,415 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:45:30,415 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:45:30,415 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:45:30,415 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 15:45:30,415 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 15:45:30,416 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 15:45:30,416 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 15:45:30,416 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 15:45:30,416 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 15:45:30,416 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 15:45:30,417 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 15:45:30,417 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 15:45:30,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:30 BoogieIcfgContainer [2020-07-21 15:45:30,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:30,425 INFO L168 Benchmark]: Toolchain (without parser) took 20735.39 ms. Allocated memory was 136.8 MB in the beginning and 395.8 MB in the end (delta: 259.0 MB). Free memory was 101.8 MB in the beginning and 283.3 MB in the end (delta: -181.6 MB). Peak memory consumption was 77.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,426 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.16 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,427 INFO L168 Benchmark]: Boogie Preprocessor took 23.42 ms. Allocated memory is still 136.8 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,428 INFO L168 Benchmark]: RCFGBuilder took 340.69 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.0 MB in the beginning and 168.7 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,429 INFO L168 Benchmark]: TraceAbstraction took 20143.80 ms. Allocated memory was 201.3 MB in the beginning and 395.8 MB in the end (delta: 194.5 MB). Free memory was 168.0 MB in the beginning and 283.3 MB in the end (delta: -115.3 MB). Peak memory consumption was 79.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:30,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.16 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 91.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.42 ms. Allocated memory is still 136.8 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.69 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.0 MB in the beginning and 168.7 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20143.80 ms. Allocated memory was 201.3 MB in the beginning and 395.8 MB in the end (delta: 194.5 MB). Free memory was 168.0 MB in the beginning and 283.3 MB in the end (delta: -115.3 MB). Peak memory consumption was 79.2 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: 19.5s, OverallIterations: 9, TraceHistogramMax: 25, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 171 SDtfs, 347 SDslu, 963 SDs, 0 SdLazy, 2007 SolverSat, 567 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 714 SyntacticMatches, 82 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 3.7s 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, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 940 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 483 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 282750 SizeOfPredicates, 50 NumberOfNonLiveVariables, 948 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...