/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:04:58,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:04:58,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:04:58,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:04:58,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:04:58,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:04:58,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:04:58,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:04:58,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:04:58,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:04:58,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:04:58,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:04:58,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:04:58,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:04:58,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:04:58,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:04:58,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:04:58,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:04:58,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:04:58,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:04:58,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:04:58,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:04:58,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:04:58,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:04:58,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:04:58,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:04:58,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:04:58,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:04:58,401 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 01:04:58,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:04:58,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:04:58,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:04:58,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:04:58,448 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:04:58,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:04:58,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:04:58,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:04:58,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:04:58,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:04:58,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:04:58,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:04:58,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:04:58,453 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:04:58,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:04:58,453 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:04:58,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:04:58,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:04:58,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:04:58,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:04:58,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:04:58,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:04:58,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:04:58,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:04:58,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:04:58,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:04:58,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:04:58,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:04:58,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:04:58,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:04:58,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:04:58,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:04:58,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:04:58,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:04:58,874 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:04:58,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2020-07-21 01:04:59,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ebf22af/7cc69b7269b0408b89f8f3efa9d8b33a/FLAGaa9468d04 [2020-07-21 01:04:59,740 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:04:59,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2020-07-21 01:04:59,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ebf22af/7cc69b7269b0408b89f8f3efa9d8b33a/FLAGaa9468d04 [2020-07-21 01:05:00,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ebf22af/7cc69b7269b0408b89f8f3efa9d8b33a [2020-07-21 01:05:00,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:05:00,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:05:00,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:00,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:05:00,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:05:00,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31392a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00, skipping insertion in model container [2020-07-21 01:05:00,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:05:00,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:05:00,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:00,471 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:05:00,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:00,536 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:05:00,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00 WrapperNode [2020-07-21 01:05:00,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:00,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:05:00,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:05:00,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:05:00,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (1/1) ... [2020-07-21 01:05:00,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:05:00,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:05:00,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:05:00,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:05:00,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (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 01:05:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:05:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:05:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:05:00,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:05:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 01:05:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:05:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-21 01:05:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:05:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:05:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:05:01,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:05:01,450 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:05:01,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:01 BoogieIcfgContainer [2020-07-21 01:05:01,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:05:01,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:05:01,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:05:01,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:05:01,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:05:00" (1/3) ... [2020-07-21 01:05:01,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28163da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:01, skipping insertion in model container [2020-07-21 01:05:01,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:00" (2/3) ... [2020-07-21 01:05:01,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28163da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:01, skipping insertion in model container [2020-07-21 01:05:01,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:01" (3/3) ... [2020-07-21 01:05:01,485 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2020-07-21 01:05:01,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:05:01,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:05:01,535 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:05:01,571 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:05:01,571 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:05:01,571 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:05:01,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:05:01,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:05:01,572 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:05:01,572 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:05:01,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:05:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-07-21 01:05:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 01:05:01,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:01,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:01,621 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919768, now seen corresponding path program 1 times [2020-07-21 01:05:01,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:01,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094460994] [2020-07-21 01:05:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:01,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:01,855 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 01:05:01,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:01,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094460994] [2020-07-21 01:05:01,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:01,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:01,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325884723] [2020-07-21 01:05:01,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:01,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:01,895 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-07-21 01:05:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:02,094 INFO L93 Difference]: Finished difference Result 136 states and 224 transitions. [2020-07-21 01:05:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:02,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 01:05:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:02,115 INFO L225 Difference]: With dead ends: 136 [2020-07-21 01:05:02,116 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 01:05:02,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 01:05:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-07-21 01:05:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 01:05:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-07-21 01:05:02,200 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 8 [2020-07-21 01:05:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:02,202 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-07-21 01:05:02,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-07-21 01:05:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:05:02,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:02,204 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:02,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:02,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454160, now seen corresponding path program 1 times [2020-07-21 01:05:02,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:02,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545328730] [2020-07-21 01:05:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:02,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:02,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:05:02,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:02,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545328730] [2020-07-21 01:05:02,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:02,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:02,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130717737] [2020-07-21 01:05:02,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:02,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:02,529 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 3 states. [2020-07-21 01:05:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:02,674 INFO L93 Difference]: Finished difference Result 161 states and 253 transitions. [2020-07-21 01:05:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:02,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 01:05:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:02,680 INFO L225 Difference]: With dead ends: 161 [2020-07-21 01:05:02,680 INFO L226 Difference]: Without dead ends: 121 [2020-07-21 01:05:02,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-21 01:05:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-07-21 01:05:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 01:05:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 184 transitions. [2020-07-21 01:05:02,719 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 184 transitions. Word has length 13 [2020-07-21 01:05:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:02,720 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 184 transitions. [2020-07-21 01:05:02,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 184 transitions. [2020-07-21 01:05:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:05:02,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:02,728 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:02,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:02,931 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1216248382, now seen corresponding path program 1 times [2020-07-21 01:05:02,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:02,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676067952] [2020-07-21 01:05:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:03,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:03,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:03,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:03,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:05:03,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:03,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676067952] [2020-07-21 01:05:03,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:03,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:03,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102055492] [2020-07-21 01:05:03,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:03,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:03,054 INFO L87 Difference]: Start difference. First operand 121 states and 184 transitions. Second operand 3 states. [2020-07-21 01:05:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:03,216 INFO L93 Difference]: Finished difference Result 237 states and 369 transitions. [2020-07-21 01:05:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:03,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 01:05:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:03,220 INFO L225 Difference]: With dead ends: 237 [2020-07-21 01:05:03,220 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 01:05:03,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 01:05:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-07-21 01:05:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-21 01:05:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 243 transitions. [2020-07-21 01:05:03,249 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 243 transitions. Word has length 19 [2020-07-21 01:05:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:03,250 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 243 transitions. [2020-07-21 01:05:03,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 243 transitions. [2020-07-21 01:05:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 01:05:03,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:03,254 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:03,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:03,466 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1623728883, now seen corresponding path program 1 times [2020-07-21 01:05:03,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:03,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130348874] [2020-07-21 01:05:03,469 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 [2020-07-21 01:05:03,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:03,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:03,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 01:05:03,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:03,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130348874] [2020-07-21 01:05:03,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:03,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:03,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614208961] [2020-07-21 01:05:03,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:03,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:03,563 INFO L87 Difference]: Start difference. First operand 159 states and 243 transitions. Second operand 3 states. [2020-07-21 01:05:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:03,823 INFO L93 Difference]: Finished difference Result 371 states and 583 transitions. [2020-07-21 01:05:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:03,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-07-21 01:05:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:03,827 INFO L225 Difference]: With dead ends: 371 [2020-07-21 01:05:03,829 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 01:05:03,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 01:05:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2020-07-21 01:05:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-07-21 01:05:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 295 transitions. [2020-07-21 01:05:03,905 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 295 transitions. Word has length 34 [2020-07-21 01:05:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:03,908 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 295 transitions. [2020-07-21 01:05:03,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 295 transitions. [2020-07-21 01:05:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 01:05:03,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:03,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:04,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:04,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1694730092, now seen corresponding path program 1 times [2020-07-21 01:05:04,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:04,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873755538] [2020-07-21 01:05:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:04,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:04,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 01:05:04,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:04,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873755538] [2020-07-21 01:05:04,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:04,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:04,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944612791] [2020-07-21 01:05:04,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:04,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:04,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:04,213 INFO L87 Difference]: Start difference. First operand 211 states and 295 transitions. Second operand 3 states. [2020-07-21 01:05:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:04,325 INFO L93 Difference]: Finished difference Result 419 states and 592 transitions. [2020-07-21 01:05:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:04,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-21 01:05:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:04,329 INFO L225 Difference]: With dead ends: 419 [2020-07-21 01:05:04,330 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 01:05:04,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 01:05:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-07-21 01:05:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-21 01:05:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 369 transitions. [2020-07-21 01:05:04,361 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 369 transitions. Word has length 48 [2020-07-21 01:05:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:04,362 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 369 transitions. [2020-07-21 01:05:04,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 369 transitions. [2020-07-21 01:05:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 01:05:04,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:04,367 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:04,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:04,582 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash 365198397, now seen corresponding path program 1 times [2020-07-21 01:05:04,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:04,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639129634] [2020-07-21 01:05:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:04,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:04,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:04,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 01:05:04,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:04,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639129634] [2020-07-21 01:05:04,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:04,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:04,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621195747] [2020-07-21 01:05:04,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:04,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:04,666 INFO L87 Difference]: Start difference. First operand 262 states and 369 transitions. Second operand 3 states. [2020-07-21 01:05:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:04,835 INFO L93 Difference]: Finished difference Result 527 states and 756 transitions. [2020-07-21 01:05:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:04,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-07-21 01:05:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:04,838 INFO L225 Difference]: With dead ends: 527 [2020-07-21 01:05:04,839 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 01:05:04,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 01:05:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-07-21 01:05:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 01:05:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2020-07-21 01:05:04,869 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 51 [2020-07-21 01:05:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:04,870 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2020-07-21 01:05:04,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2020-07-21 01:05:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 01:05:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:04,882 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:05,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:05,085 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1939547864, now seen corresponding path program 1 times [2020-07-21 01:05:05,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:05,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884498571] [2020-07-21 01:05:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:05,141 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:05,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:05:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 01:05:05,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:05,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884498571] [2020-07-21 01:05:05,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:05,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:05,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603559902] [2020-07-21 01:05:05,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:05,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:05,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:05,189 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand 3 states. [2020-07-21 01:05:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:05,275 INFO L93 Difference]: Finished difference Result 225 states and 289 transitions. [2020-07-21 01:05:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:05,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-07-21 01:05:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:05,278 INFO L225 Difference]: With dead ends: 225 [2020-07-21 01:05:05,279 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 01:05:05,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 01:05:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-07-21 01:05:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-21 01:05:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 287 transitions. [2020-07-21 01:05:05,297 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 287 transitions. Word has length 79 [2020-07-21 01:05:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:05,298 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 287 transitions. [2020-07-21 01:05:05,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 287 transitions. [2020-07-21 01:05:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 01:05:05,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:05,302 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:05:05,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:05,514 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2067785068, now seen corresponding path program 1 times [2020-07-21 01:05:05,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:05,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116397100] [2020-07-21 01:05:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:05,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 01:05:05,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:05,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116397100] [2020-07-21 01:05:05,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:05,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:05,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3666487] [2020-07-21 01:05:05,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:05,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:05,626 INFO L87 Difference]: Start difference. First operand 223 states and 287 transitions. Second operand 3 states. [2020-07-21 01:05:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:05,666 INFO L93 Difference]: Finished difference Result 344 states and 418 transitions. [2020-07-21 01:05:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:05,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-07-21 01:05:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:05,668 INFO L225 Difference]: With dead ends: 344 [2020-07-21 01:05:05,668 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:05:05,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:05:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:05:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:05:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:05:05,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 95 [2020-07-21 01:05:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:05,672 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:05:05,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:05:05,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:05:05,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:05,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:05:06,472 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:05:06,473 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:06,473 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:06,473 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:05:06,474 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point L60(lines 60 189) no Hoare annotation was computed. [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 217) no Hoare annotation was computed. [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point L151-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point L52(lines 52 193) no Hoare annotation was computed. [2020-07-21 01:05:06,474 INFO L268 CegarLoopResult]: For program point L85-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 01:05:06,475 INFO L264 CegarLoopResult]: At program point L176(lines 22 211) the Hoare annotation is: (let ((.cse0 (<= main_~blastFlag~0 3))) (or (and (not (= 0 main_~s__hit~0)) .cse0 (<= 8640 main_~s__state~0)) (and (<= 8672 main_~s__state~0) .cse0) (<= main_~blastFlag~0 2))) [2020-07-21 01:05:06,475 INFO L268 CegarLoopResult]: For program point L44(lines 44 197) no Hoare annotation was computed. [2020-07-21 01:05:06,475 INFO L268 CegarLoopResult]: For program point L135(lines 135 139) no Hoare annotation was computed. [2020-07-21 01:05:06,476 INFO L264 CegarLoopResult]: At program point L69(lines 68 185) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-21 01:05:06,476 INFO L268 CegarLoopResult]: For program point L36(lines 36 201) no Hoare annotation was computed. [2020-07-21 01:05:06,476 INFO L264 CegarLoopResult]: At program point L61(lines 60 189) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,476 INFO L264 CegarLoopResult]: At program point L53(lines 52 193) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,476 INFO L264 CegarLoopResult]: At program point L45(lines 44 197) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,476 INFO L268 CegarLoopResult]: For program point L78-1(lines 78 80) no Hoare annotation was computed. [2020-07-21 01:05:06,477 INFO L268 CegarLoopResult]: For program point L169-1(lines 74 183) no Hoare annotation was computed. [2020-07-21 01:05:06,477 INFO L264 CegarLoopResult]: At program point L37(lines 36 201) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,477 INFO L268 CegarLoopResult]: For program point L29(lines 29 204) no Hoare annotation was computed. [2020-07-21 01:05:06,477 INFO L264 CegarLoopResult]: At program point L120(lines 113 122) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,477 INFO L264 CegarLoopResult]: At program point L112(lines 105 123) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,478 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 217) no Hoare annotation was computed. [2020-07-21 01:05:06,478 INFO L268 CegarLoopResult]: For program point L162-1(lines 162 164) no Hoare annotation was computed. [2020-07-21 01:05:06,478 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 215) no Hoare annotation was computed. [2020-07-21 01:05:06,478 INFO L264 CegarLoopResult]: At program point L30(lines 29 204) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,479 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 217) the Hoare annotation is: true [2020-07-21 01:05:06,479 INFO L268 CegarLoopResult]: For program point L105(lines 105 123) no Hoare annotation was computed. [2020-07-21 01:05:06,479 INFO L268 CegarLoopResult]: For program point L72(lines 72 183) no Hoare annotation was computed. [2020-07-21 01:05:06,479 INFO L268 CegarLoopResult]: For program point L64(lines 64 187) no Hoare annotation was computed. [2020-07-21 01:05:06,479 INFO L268 CegarLoopResult]: For program point L56(lines 56 191) no Hoare annotation was computed. [2020-07-21 01:05:06,480 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-21 01:05:06,480 INFO L271 CegarLoopResult]: At program point L213(lines 8 217) the Hoare annotation is: true [2020-07-21 01:05:06,480 INFO L268 CegarLoopResult]: For program point L114(lines 114 118) no Hoare annotation was computed. [2020-07-21 01:05:06,480 INFO L268 CegarLoopResult]: For program point L48(lines 48 195) no Hoare annotation was computed. [2020-07-21 01:05:06,480 INFO L268 CegarLoopResult]: For program point L172(lines 172 174) no Hoare annotation was computed. [2020-07-21 01:05:06,481 INFO L268 CegarLoopResult]: For program point L106(lines 106 110) no Hoare annotation was computed. [2020-07-21 01:05:06,481 INFO L264 CegarLoopResult]: At program point L73(lines 72 183) the Hoare annotation is: (and (<= 8672 main_~s__state~0) (<= main_~blastFlag~0 3)) [2020-07-21 01:05:06,481 INFO L268 CegarLoopResult]: For program point L40(lines 40 199) no Hoare annotation was computed. [2020-07-21 01:05:06,481 INFO L264 CegarLoopResult]: At program point L65(lines 64 187) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-21 01:05:06,481 INFO L268 CegarLoopResult]: For program point L32(lines 32 203) no Hoare annotation was computed. [2020-07-21 01:05:06,482 INFO L264 CegarLoopResult]: At program point L57(lines 56 191) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,482 INFO L264 CegarLoopResult]: At program point L49(lines 48 195) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,482 INFO L264 CegarLoopResult]: At program point L173(lines 8 217) the Hoare annotation is: false [2020-07-21 01:05:06,482 INFO L264 CegarLoopResult]: At program point L41(lines 40 199) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,482 INFO L264 CegarLoopResult]: At program point L33(lines 32 203) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-21 01:05:06,483 INFO L268 CegarLoopResult]: For program point L68(lines 68 185) no Hoare annotation was computed. [2020-07-21 01:05:06,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:05:06 BoogieIcfgContainer [2020-07-21 01:05:06,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:05:06,520 INFO L168 Benchmark]: Toolchain (without parser) took 6445.90 ms. Allocated memory was 135.8 MB in the beginning and 251.7 MB in the end (delta: 115.9 MB). Free memory was 100.4 MB in the beginning and 182.2 MB in the end (delta: -81.8 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,521 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.59 ms. Allocated memory is still 135.8 MB. Free memory was 100.0 MB in the beginning and 89.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,525 INFO L168 Benchmark]: Boogie Preprocessor took 186.29 ms. Allocated memory was 135.8 MB in the beginning and 201.3 MB in the end (delta: 65.5 MB). Free memory was 89.0 MB in the beginning and 179.3 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,526 INFO L168 Benchmark]: RCFGBuilder took 743.18 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 160.3 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,529 INFO L168 Benchmark]: TraceAbstraction took 5045.72 ms. Allocated memory was 201.3 MB in the beginning and 251.7 MB in the end (delta: 50.3 MB). Free memory was 159.6 MB in the beginning and 182.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:06,542 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 461.59 ms. Allocated memory is still 135.8 MB. Free memory was 100.0 MB in the beginning and 89.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 186.29 ms. Allocated memory was 135.8 MB in the beginning and 201.3 MB in the end (delta: 65.5 MB). Free memory was 89.0 MB in the beginning and 179.3 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 743.18 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 160.3 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5045.72 ms. Allocated memory was 201.3 MB in the beginning and 251.7 MB in the end (delta: 50.3 MB). Free memory was 159.6 MB in the beginning and 182.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 215]: 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 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 113]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 68]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 105]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) || (8672 <= s__state && blastFlag <= 3)) || blastFlag <= 2 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 60]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 72]: Loop Invariant Derived loop invariant: 8672 <= s__state && blastFlag <= 3 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: blastFlag <= 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 513 SDtfs, 290 SDslu, 344 SDs, 0 SdLazy, 215 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 21 PreInvPairs, 86 NumberOfFragments, 106 HoareAnnotationTreeSize, 21 FomulaSimplifications, 614 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 21 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 347 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 38997 SizeOfPredicates, 7 NumberOfNonLiveVariables, 651 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 374/374 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...