/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:11:05,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:11:05,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:11:05,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:11:05,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:11:05,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:11:05,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:11:05,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:11:05,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:11:05,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:11:05,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:11:05,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:11:05,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:11:05,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:11:05,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:11:05,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:11:05,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:11:05,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:11:05,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:11:05,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:11:05,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:11:05,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:11:05,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:11:05,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:11:05,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:11:05,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:11:05,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:11:05,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:11:05,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:11:05,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:11:05,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:11:05,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:11:05,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:11:05,508 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:11:05,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:11:05,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:11:05,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:11:05,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:11:05,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:11:05,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:11:05,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:11:05,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:11:05,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:11:05,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:11:05,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:11:05,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:11:05,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:11:05,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:11:05,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:11:05,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:11:05,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:05,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:11:05,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:11:05,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:11:05,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:11:05,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:11:05,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:11:05,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:11:05,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:11:05,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:11:05,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:11:05,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:11:05,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:11:05,821 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:11:05,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-20 01:11:05,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9fc9372c/dae75719e4264fb9bea08dada90d076a/FLAGaed5efd60 [2020-07-20 01:11:06,347 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:11:06,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-20 01:11:06,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9fc9372c/dae75719e4264fb9bea08dada90d076a/FLAGaed5efd60 [2020-07-20 01:11:06,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9fc9372c/dae75719e4264fb9bea08dada90d076a [2020-07-20 01:11:06,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:11:06,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:11:06,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:06,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:11:06,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:11:06,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:06" (1/1) ... [2020-07-20 01:11:06,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d694bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:06, skipping insertion in model container [2020-07-20 01:11:06,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:06" (1/1) ... [2020-07-20 01:11:06,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:11:06,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:11:07,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:07,025 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:11:07,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:11:07,056 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:11:07,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07 WrapperNode [2020-07-20 01:11:07,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:11:07,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:11:07,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:11:07,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:11:07,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... [2020-07-20 01:11:07,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:11:07,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:11:07,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:11:07,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:11:07,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:11:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:11:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:11:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 01:11:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:11:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:11:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:11:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 01:11:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:11:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:11:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:11:07,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:11:07,456 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:11:07,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:07 BoogieIcfgContainer [2020-07-20 01:11:07,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:11:07,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:11:07,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:11:07,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:11:07,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:06" (1/3) ... [2020-07-20 01:11:07,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27402f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:07, skipping insertion in model container [2020-07-20 01:11:07,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:07" (2/3) ... [2020-07-20 01:11:07,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27402f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:07, skipping insertion in model container [2020-07-20 01:11:07,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:07" (3/3) ... [2020-07-20 01:11:07,497 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-20 01:11:07,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:11:07,543 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:11:07,569 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:11:07,593 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:11:07,593 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:11:07,593 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:11:07,593 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:11:07,593 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:11:07,594 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:11:07,594 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:11:07,594 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:11:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 01:11:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 01:11:07,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:07,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:07,625 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 01:11:07,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:07,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529629843] [2020-07-20 01:11:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:11:07,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529629843] [2020-07-20 01:11:07,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:11:07,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:11:07,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762524308] [2020-07-20 01:11:07,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:11:07,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:11:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:11:07,867 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-20 01:11:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:08,014 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-20 01:11:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:11:08,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 01:11:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:08,028 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:11:08,028 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 01:11:08,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:11:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 01:11:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 01:11:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 01:11:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 01:11:08,086 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-20 01:11:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:08,086 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 01:11:08,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:11:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 01:11:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:11:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:08,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:08,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:11:08,091 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 01:11:08,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:08,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542972524] [2020-07-20 01:11:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:11:08,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542972524] [2020-07-20 01:11:08,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463382247] [2020-07-20 01:11:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3277b06a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:08,290 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3277b06a issued 2 check-sat command(s) [2020-07-20 01:11:08,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:11:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:11:08,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:08,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-07-20 01:11:08,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595044350] [2020-07-20 01:11:08,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:11:08,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:11:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:11:08,413 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 9 states. [2020-07-20 01:11:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:08,781 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2020-07-20 01:11:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:11:08,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-20 01:11:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:08,788 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:11:08,789 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:11:08,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:11:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:11:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 01:11:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 01:11:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 57 transitions. [2020-07-20 01:11:08,820 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 57 transitions. Word has length 22 [2020-07-20 01:11:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:08,821 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 57 transitions. [2020-07-20 01:11:08,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:11:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 57 transitions. [2020-07-20 01:11:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 01:11:08,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:08,831 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:09,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:11:09,037 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 564623689, now seen corresponding path program 1 times [2020-07-20 01:11:09,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:09,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689518542] [2020-07-20 01:11:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 01:11:09,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689518542] [2020-07-20 01:11:09,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064037421] [2020-07-20 01:11:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16cc0ac0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:09,644 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16cc0ac0 issued 2 check-sat command(s) [2020-07-20 01:11:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:11:09,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 69 proven. 112 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 01:11:09,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:09,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 01:11:09,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584065816] [2020-07-20 01:11:09,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:11:09,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:11:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:11:09,736 INFO L87 Difference]: Start difference. First operand 38 states and 57 transitions. Second operand 13 states. [2020-07-20 01:11:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:10,118 INFO L93 Difference]: Finished difference Result 94 states and 203 transitions. [2020-07-20 01:11:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:11:10,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 01:11:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:10,123 INFO L225 Difference]: With dead ends: 94 [2020-07-20 01:11:10,124 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:11:10,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:11:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:11:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 01:11:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:11:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 88 transitions. [2020-07-20 01:11:10,145 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 88 transitions. Word has length 82 [2020-07-20 01:11:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:10,145 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 88 transitions. [2020-07-20 01:11:10,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:11:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 88 transitions. [2020-07-20 01:11:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 01:11:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:10,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:10,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:10,364 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 2 times [2020-07-20 01:11:10,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:10,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196270187] [2020-07-20 01:11:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-20 01:11:10,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196270187] [2020-07-20 01:11:10,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401411069] [2020-07-20 01:11:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d255f23 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:10,748 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d255f23 issued 3 check-sat command(s) [2020-07-20 01:11:10,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:11:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-20 01:11:10,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:10,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-07-20 01:11:10,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343145218] [2020-07-20 01:11:10,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:11:10,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:11:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:11:10,822 INFO L87 Difference]: Start difference. First operand 57 states and 88 transitions. Second operand 18 states. [2020-07-20 01:11:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:11,740 INFO L93 Difference]: Finished difference Result 164 states and 347 transitions. [2020-07-20 01:11:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 01:11:11,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-07-20 01:11:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:11,750 INFO L225 Difference]: With dead ends: 164 [2020-07-20 01:11:11,750 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 01:11:11,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:11:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 01:11:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-07-20 01:11:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 01:11:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 130 transitions. [2020-07-20 01:11:11,801 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 130 transitions. Word has length 62 [2020-07-20 01:11:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:11,802 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 130 transitions. [2020-07-20 01:11:11,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:11:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 130 transitions. [2020-07-20 01:11:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 01:11:11,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:11,812 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:12,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:12,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 3 times [2020-07-20 01:11:12,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:12,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615638554] [2020-07-20 01:11:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-20 01:11:12,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615638554] [2020-07-20 01:11:12,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276891808] [2020-07-20 01:11:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@141e0ae No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:12,667 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@141e0ae issued 4 check-sat command(s) [2020-07-20 01:11:12,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 01:11:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-20 01:11:12,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:12,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-07-20 01:11:12,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312851550] [2020-07-20 01:11:12,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:11:12,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:11:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:11:12,829 INFO L87 Difference]: Start difference. First operand 88 states and 130 transitions. Second operand 18 states. [2020-07-20 01:11:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:13,577 INFO L93 Difference]: Finished difference Result 197 states and 344 transitions. [2020-07-20 01:11:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 01:11:13,581 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-07-20 01:11:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:13,590 INFO L225 Difference]: With dead ends: 197 [2020-07-20 01:11:13,590 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 01:11:13,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:11:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 01:11:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-07-20 01:11:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-20 01:11:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 155 transitions. [2020-07-20 01:11:13,622 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 155 transitions. Word has length 134 [2020-07-20 01:11:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:13,623 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 155 transitions. [2020-07-20 01:11:13,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:11:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 155 transitions. [2020-07-20 01:11:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-20 01:11:13,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:13,626 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:13,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:13,841 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:13,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 4 times [2020-07-20 01:11:13,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:13,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910306253] [2020-07-20 01:11:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-20 01:11:14,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910306253] [2020-07-20 01:11:14,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218160837] [2020-07-20 01:11:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59ab3aa2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:14,601 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59ab3aa2 issued 4 check-sat command(s) [2020-07-20 01:11:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 01:11:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-20 01:11:14,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:14,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-20 01:11:14,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402782297] [2020-07-20 01:11:14,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 01:11:14,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 01:11:14,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:11:14,736 INFO L87 Difference]: Start difference. First operand 103 states and 155 transitions. Second operand 24 states. [2020-07-20 01:11:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:15,809 INFO L93 Difference]: Finished difference Result 227 states and 402 transitions. [2020-07-20 01:11:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 01:11:15,812 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-20 01:11:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:15,817 INFO L225 Difference]: With dead ends: 227 [2020-07-20 01:11:15,817 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 01:11:15,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 01:11:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 01:11:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2020-07-20 01:11:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 01:11:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 188 transitions. [2020-07-20 01:11:15,842 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 188 transitions. Word has length 160 [2020-07-20 01:11:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:15,843 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 188 transitions. [2020-07-20 01:11:15,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 01:11:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 188 transitions. [2020-07-20 01:11:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-20 01:11:15,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:15,846 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:16,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:11:16,062 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 5 times [2020-07-20 01:11:16,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:16,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785510190] [2020-07-20 01:11:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-20 01:11:16,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785510190] [2020-07-20 01:11:16,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724002874] [2020-07-20 01:11:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4263094a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:17,145 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4263094a issued 4 check-sat command(s) [2020-07-20 01:11:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 01:11:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-20 01:11:17,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:17,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-07-20 01:11:17,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855989633] [2020-07-20 01:11:17,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 01:11:17,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:17,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 01:11:17,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:11:17,319 INFO L87 Difference]: Start difference. First operand 118 states and 188 transitions. Second operand 26 states. [2020-07-20 01:11:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:18,420 INFO L93 Difference]: Finished difference Result 183 states and 319 transitions. [2020-07-20 01:11:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 01:11:18,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-07-20 01:11:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:18,426 INFO L225 Difference]: With dead ends: 183 [2020-07-20 01:11:18,427 INFO L226 Difference]: Without dead ends: 179 [2020-07-20 01:11:18,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=588, Invalid=2604, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 01:11:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-20 01:11:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-07-20 01:11:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 01:11:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 245 transitions. [2020-07-20 01:11:18,452 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 245 transitions. Word has length 186 [2020-07-20 01:11:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:18,453 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 245 transitions. [2020-07-20 01:11:18,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 01:11:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 245 transitions. [2020-07-20 01:11:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 01:11:18,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:11:18,456 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:11:18,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:18,663 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:11:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:11:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-20 01:11:18,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:11:18,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279970364] [2020-07-20 01:11:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17665fdd [2020-07-20 01:11:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:11:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-20 01:11:19,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279970364] [2020-07-20 01:11:19,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307922514] [2020-07-20 01:11:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b43e0f6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:19,445 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b43e0f6 issued 4 check-sat command(s) [2020-07-20 01:11:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:11:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 01:11:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:11:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 01:11:19,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:11:19,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-20 01:11:19,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888816648] [2020-07-20 01:11:19,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 01:11:19,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:11:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 01:11:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:11:19,609 INFO L87 Difference]: Start difference. First operand 141 states and 245 transitions. Second operand 25 states. [2020-07-20 01:11:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:11:20,886 INFO L93 Difference]: Finished difference Result 285 states and 576 transitions. [2020-07-20 01:11:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 01:11:20,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-20 01:11:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:11:20,888 INFO L225 Difference]: With dead ends: 285 [2020-07-20 01:11:20,888 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:11:20,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 01:11:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:11:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:11:20,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:11:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:11:20,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2020-07-20 01:11:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:11:20,894 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:11:20,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 01:11:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:11:20,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:11:21,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:11:21,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:11:21,675 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2020-07-20 01:11:23,265 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 38 [2020-07-20 01:11:23,369 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:11:23,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:11:23,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:11:23,370 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:11:23,370 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:11:23,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:11:23,370 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 01:11:23,370 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 01:11:23,371 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= 0 |ackermann_#in~m|))) [2020-07-20 01:11:23,371 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 01:11:23,371 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= 0 |ackermann_#in~m|)) (= 0 |ackermann_#in~n|)) [2020-07-20 01:11:23,371 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (and (not (<= |ackermann_#in~n| 0)) (not (<= |ackermann_#in~m| 0)) (let ((.cse0 (<= |ackermann_#in~n| 1)) (.cse4 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 3 |ackermann_#t~ret1|)) (.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= |ackermann_#in~m| 1)) (.cse5 (<= |ackermann_#in~n| 2))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 2 |ackermann_#t~ret1|)) (and .cse1 .cse2 (<= 6 |ackermann_#t~ret1|)) (and .cse1 .cse2 .cse3 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|)) (and (<= ackermann_~m 2) .cse1 .cse2 .cse4 .cse5) (and .cse0 .cse6 .cse1 .cse2) (and (<= |ackermann_#in~n| 4) .cse1 .cse2 .cse4 .cse3) (and .cse6 .cse1 .cse2 .cse3 .cse5)))) [2020-07-20 01:11:23,371 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 01:11:23,371 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 01:11:23,372 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 01:11:23,373 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-20 01:11:23,373 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 01:11:23,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:11:23 BoogieIcfgContainer [2020-07-20 01:11:23,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:11:23,383 INFO L168 Benchmark]: Toolchain (without parser) took 16651.23 ms. Allocated memory was 138.9 MB in the beginning and 423.6 MB in the end (delta: 284.7 MB). Free memory was 103.8 MB in the beginning and 165.8 MB in the end (delta: -62.0 MB). Peak memory consumption was 299.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,384 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,385 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.57 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,385 INFO L168 Benchmark]: Boogie Preprocessor took 41.09 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,386 INFO L168 Benchmark]: RCFGBuilder took 360.73 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 168.4 MB in the end (delta: -76.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,387 INFO L168 Benchmark]: TraceAbstraction took 15903.72 ms. Allocated memory was 201.9 MB in the beginning and 423.6 MB in the end (delta: 221.8 MB). Free memory was 167.8 MB in the beginning and 165.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 300.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:11:23,391 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.57 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.09 ms. Allocated memory is still 138.9 MB. Free memory was 93.8 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.73 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 168.4 MB in the end (delta: -76.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15903.72 ms. Allocated memory was 201.9 MB in the beginning and 423.6 MB in the end (delta: 221.8 MB). Free memory was 167.8 MB in the beginning and 165.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 300.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 8, TraceHistogramMax: 27, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 327 SDslu, 1139 SDs, 0 SdLazy, 2791 SolverSat, 825 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1366 GetRequests, 1077 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=7, 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, 8 MinimizatonAttempts, 82 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 453 PreInvPairs, 969 NumberOfFragments, 144 HoareAnnotationTreeSize, 453 FomulaSimplifications, 91243 FormulaSimplificationTreeSizeReduction, 1.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2860 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1653 NumberOfCodeBlocks, 1589 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1638 ConstructedInterpolants, 0 QuantifiedInterpolants, 436024 SizeOfPredicates, 58 NumberOfNonLiveVariables, 2308 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 9328/11412 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...