/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_FUNCTIONS --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/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:02:13,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:02:13,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:02:13,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:02:13,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:02:13,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:02:13,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:02:13,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:02:13,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:02:13,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:02:13,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:02:13,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:02:13,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:02:13,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:02:13,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:02:13,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:02:13,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:02:13,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:02:13,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:02:13,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:02:13,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:02:13,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:02:13,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:02:13,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:02:13,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:02:13,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:02:13,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:02:13,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:02:13,086 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 [2020-07-19 23:02:13,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:02:13,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:02:13,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:02:13,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:02:13,122 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:02:13,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:02:13,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:02:13,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:02:13,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:02:13,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:02:13,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:02:13,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:02:13,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:02:13,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:02:13,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:02:13,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:02:13,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:02:13,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:02:13,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:02:13,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:02:13,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:02:13,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:02:13,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:02:13,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:02:13,130 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_FUNCTIONS 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 [2020-07-19 23:02:13,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:02:13,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:02:13,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:02:13,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:02:13,415 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:02:13,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-19 23:02:13,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0027321d0/8fc9d64093804116856365a1a246d5e0/FLAG11ce89193 [2020-07-19 23:02:13,907 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:02:13,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-19 23:02:13,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0027321d0/8fc9d64093804116856365a1a246d5e0/FLAG11ce89193 [2020-07-19 23:02:14,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0027321d0/8fc9d64093804116856365a1a246d5e0 [2020-07-19 23:02:14,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:02:14,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:02:14,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:14,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:02:14,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:02:14,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bced47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14, skipping insertion in model container [2020-07-19 23:02:14,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:02:14,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:02:14,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:14,546 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:02:14,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:14,572 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:02:14,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14 WrapperNode [2020-07-19 23:02:14,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:14,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:02:14,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:02:14,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:02:14,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (1/1) ... [2020-07-19 23:02:14,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:02:14,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:02:14,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:02:14,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:02:14,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (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 [2020-07-19 23:02:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:02:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:02:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-19 23:02:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:02:14,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:02:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:02:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-19 23:02:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:02:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:02:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:02:14,947 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:02:14,947 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:02:14,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:14 BoogieIcfgContainer [2020-07-19 23:02:14,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:02:14,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:02:14,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:02:14,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:02:14,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:02:14" (1/3) ... [2020-07-19 23:02:14,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ed3426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:14, skipping insertion in model container [2020-07-19 23:02:14,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:14" (2/3) ... [2020-07-19 23:02:14,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ed3426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:14, skipping insertion in model container [2020-07-19 23:02:14,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:14" (3/3) ... [2020-07-19 23:02:14,961 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-19 23:02:14,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:02:14,982 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:02:15,001 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:02:15,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:02:15,035 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:02:15,035 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:02:15,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:02:15,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:02:15,036 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:02:15,036 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:02:15,036 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:02:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-19 23:02:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 23:02:15,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:15,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:15,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-19 23:02:15,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:15,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122494866] [2020-07-19 23:02:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:15,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122494866] [2020-07-19 23:02:15,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:15,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446985071] [2020-07-19 23:02:15,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:15,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:15,369 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-19 23:02:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:15,519 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-19 23:02:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:15,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-19 23:02:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:15,533 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:02:15,534 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 23:02:15,538 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 [2020-07-19 23:02:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 23:02:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-19 23:02:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 23:02:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-19 23:02:15,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-19 23:02:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:15,584 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-19 23:02:15,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-19 23:02:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:02:15,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:15,588 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] [2020-07-19 23:02:15,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:02:15,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:15,589 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-19 23:02:15,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:15,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132588568] [2020-07-19 23:02:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:02:15,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132588568] [2020-07-19 23:02:15,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410939888] [2020-07-19 23:02:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dfad143 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:15,771 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dfad143 issued 2 check-sat command(s) [2020-07-19 23:02:15,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:02:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:02:15,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:15,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-07-19 23:02:15,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151907780] [2020-07-19 23:02:15,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:02:15,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:02:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:02:15,868 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 9 states. [2020-07-19 23:02:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:16,184 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2020-07-19 23:02:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:02:16,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-19 23:02:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:16,188 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:02:16,188 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 23:02:16,190 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 [2020-07-19 23:02:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 23:02:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-19 23:02:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 23:02:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 57 transitions. [2020-07-19 23:02:16,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 57 transitions. Word has length 22 [2020-07-19 23:02:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:16,205 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 57 transitions. [2020-07-19 23:02:16,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:02:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 57 transitions. [2020-07-19 23:02:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 23:02:16,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:16,210 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] [2020-07-19 23:02:16,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:02:16,424 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 564623689, now seen corresponding path program 1 times [2020-07-19 23:02:16,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:16,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096845965] [2020-07-19 23:02:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-19 23:02:16,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096845965] [2020-07-19 23:02:16,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903488521] [2020-07-19 23:02:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5517e0bd 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 [2020-07-19 23:02:16,911 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5517e0bd issued 2 check-sat command(s) [2020-07-19 23:02:16,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:02:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 120 proven. 20 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-19 23:02:16,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:16,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-07-19 23:02:16,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082818551] [2020-07-19 23:02:17,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:02:17,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:02:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:02:17,001 INFO L87 Difference]: Start difference. First operand 38 states and 57 transitions. Second operand 13 states. [2020-07-19 23:02:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:17,471 INFO L93 Difference]: Finished difference Result 101 states and 230 transitions. [2020-07-19 23:02:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:02:17,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-19 23:02:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:17,475 INFO L225 Difference]: With dead ends: 101 [2020-07-19 23:02:17,475 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:02:17,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:02:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:02:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:02:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:02:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-07-19 23:02:17,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 82 [2020-07-19 23:02:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:17,490 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-07-19 23:02:17,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:02:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-07-19 23:02:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 23:02:17,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:17,493 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] [2020-07-19 23:02:17,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:17,707 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:17,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 2 times [2020-07-19 23:02:17,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:17,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61974107] [2020-07-19 23:02:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-19 23:02:17,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61974107] [2020-07-19 23:02:17,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966844278] [2020-07-19 23:02:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d7a656e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:17,987 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d7a656e issued 3 check-sat command(s) [2020-07-19 23:02:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:02:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-19 23:02:18,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:18,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-07-19 23:02:18,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038791590] [2020-07-19 23:02:18,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:02:18,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:02:18,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:02:18,066 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 18 states. [2020-07-19 23:02:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:18,800 INFO L93 Difference]: Finished difference Result 107 states and 147 transitions. [2020-07-19 23:02:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:02:18,801 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-07-19 23:02:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:18,803 INFO L225 Difference]: With dead ends: 107 [2020-07-19 23:02:18,803 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 23:02:18,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:02:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 23:02:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-19 23:02:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 23:02:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-07-19 23:02:18,816 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 62 [2020-07-19 23:02:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:18,816 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-07-19 23:02:18,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:02:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-07-19 23:02:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-19 23:02:18,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:18,820 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] [2020-07-19 23:02:19,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:19,036 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 3 times [2020-07-19 23:02:19,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:19,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563916477] [2020-07-19 23:02:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-19 23:02:19,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563916477] [2020-07-19 23:02:19,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533969128] [2020-07-19 23:02:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3af0cb98 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 [2020-07-19 23:02:19,590 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3af0cb98 issued 4 check-sat command(s) [2020-07-19 23:02:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 23:02:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-19 23:02:19,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:19,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-07-19 23:02:19,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201890695] [2020-07-19 23:02:19,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:02:19,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:02:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:02:19,685 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 18 states. [2020-07-19 23:02:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:20,354 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-07-19 23:02:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:02:20,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-07-19 23:02:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:20,357 INFO L225 Difference]: With dead ends: 125 [2020-07-19 23:02:20,357 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 23:02:20,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:02:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 23:02:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-19 23:02:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 23:02:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-07-19 23:02:20,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 134 [2020-07-19 23:02:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:20,370 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-07-19 23:02:20,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:02:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-07-19 23:02:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-19 23:02:20,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:20,373 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] [2020-07-19 23:02:20,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:20,587 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 4 times [2020-07-19 23:02:20,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:20,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429824020] [2020-07-19 23:02:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-19 23:02:21,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429824020] [2020-07-19 23:02:21,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582451797] [2020-07-19 23:02:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a918c36 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:21,369 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a918c36 issued 4 check-sat command(s) [2020-07-19 23:02:21,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:21,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 23:02:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-19 23:02:21,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:21,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-19 23:02:21,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510749261] [2020-07-19 23:02:21,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:02:21,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:02:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:02:21,491 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 24 states. [2020-07-19 23:02:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:22,425 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-07-19 23:02:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 23:02:22,426 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-19 23:02:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:22,429 INFO L225 Difference]: With dead ends: 137 [2020-07-19 23:02:22,430 INFO L226 Difference]: Without dead ends: 93 [2020-07-19 23:02:22,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 23:02:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-19 23:02:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-07-19 23:02:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 23:02:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2020-07-19 23:02:22,445 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 160 [2020-07-19 23:02:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:22,446 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2020-07-19 23:02:22,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:02:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2020-07-19 23:02:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-19 23:02:22,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:22,448 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] [2020-07-19 23:02:22,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:02:22,662 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 5 times [2020-07-19 23:02:22,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:22,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329868879] [2020-07-19 23:02:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-19 23:02:23,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329868879] [2020-07-19 23:02:23,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164206334] [2020-07-19 23:02:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52f7a8da 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 [2020-07-19 23:02:23,669 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52f7a8da issued 4 check-sat command(s) [2020-07-19 23:02:23,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-19 23:02:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-19 23:02:23,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:23,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 25 [2020-07-19 23:02:23,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716931696] [2020-07-19 23:02:23,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:02:23,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:23,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:02:23,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:02:23,907 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 25 states. [2020-07-19 23:02:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:25,735 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2020-07-19 23:02:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 23:02:25,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2020-07-19 23:02:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:25,740 INFO L225 Difference]: With dead ends: 134 [2020-07-19 23:02:25,740 INFO L226 Difference]: Without dead ends: 127 [2020-07-19 23:02:25,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 23:02:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-19 23:02:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-07-19 23:02:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 23:02:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-07-19 23:02:25,773 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 186 [2020-07-19 23:02:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:25,774 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-07-19 23:02:25,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:02:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-07-19 23:02:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-19 23:02:25,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:25,777 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] [2020-07-19 23:02:25,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:25,981 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-19 23:02:25,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:25,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562468733] [2020-07-19 23:02:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-19 23:02:26,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562468733] [2020-07-19 23:02:26,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825092274] [2020-07-19 23:02:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66dcfc5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:26,706 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66dcfc5f issued 4 check-sat command(s) [2020-07-19 23:02:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 23:02:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-19 23:02:26,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:26,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-19 23:02:26,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819062473] [2020-07-19 23:02:26,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:02:26,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:02:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:02:26,904 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 25 states. [2020-07-19 23:02:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:27,973 INFO L93 Difference]: Finished difference Result 206 states and 280 transitions. [2020-07-19 23:02:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 23:02:27,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-19 23:02:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:27,977 INFO L225 Difference]: With dead ends: 206 [2020-07-19 23:02:27,977 INFO L226 Difference]: Without dead ends: 135 [2020-07-19 23:02:27,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2020-07-19 23:02:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-19 23:02:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2020-07-19 23:02:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-19 23:02:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2020-07-19 23:02:27,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 173 [2020-07-19 23:02:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:27,999 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2020-07-19 23:02:27,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:02:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2020-07-19 23:02:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-19 23:02:28,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:28,002 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:28,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:28,216 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 7 times [2020-07-19 23:02:28,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:28,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258677351] [2020-07-19 23:02:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2020-07-19 23:02:29,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258677351] [2020-07-19 23:02:29,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652051303] [2020-07-19 23:02:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7023c305 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:29,142 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7023c305 issued 4 check-sat command(s) [2020-07-19 23:02:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 23:02:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-19 23:02:29,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:29,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2020-07-19 23:02:29,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726944765] [2020-07-19 23:02:29,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:02:29,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:02:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:02:29,270 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand 27 states. [2020-07-19 23:02:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:30,234 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2020-07-19 23:02:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:02:30,235 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 199 [2020-07-19 23:02:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:30,237 INFO L225 Difference]: With dead ends: 210 [2020-07-19 23:02:30,237 INFO L226 Difference]: Without dead ends: 137 [2020-07-19 23:02:30,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2020-07-19 23:02:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-19 23:02:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-07-19 23:02:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 23:02:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-07-19 23:02:30,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 199 [2020-07-19 23:02:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:30,282 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-07-19 23:02:30,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:02:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-07-19 23:02:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-19 23:02:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:30,291 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:30,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:02:30,497 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:30,498 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 8 times [2020-07-19 23:02:30,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:30,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697382721] [2020-07-19 23:02:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 268 proven. 783 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2020-07-19 23:02:31,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697382721] [2020-07-19 23:02:31,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234338702] [2020-07-19 23:02:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@155cc1d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:31,201 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@155cc1d9 issued 3 check-sat command(s) [2020-07-19 23:02:31,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 23:02:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-19 23:02:31,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:31,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2020-07-19 23:02:31,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330673162] [2020-07-19 23:02:31,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:02:31,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:02:31,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:02:31,284 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 20 states. [2020-07-19 23:02:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:31,894 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2020-07-19 23:02:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:02:31,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 212 [2020-07-19 23:02:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:31,897 INFO L225 Difference]: With dead ends: 178 [2020-07-19 23:02:31,898 INFO L226 Difference]: Without dead ends: 107 [2020-07-19 23:02:31,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:02:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-19 23:02:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2020-07-19 23:02:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-19 23:02:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2020-07-19 23:02:31,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 212 [2020-07-19 23:02:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:31,935 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2020-07-19 23:02:31,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:02:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2020-07-19 23:02:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-19 23:02:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:31,949 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:32,162 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:32,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 9 times [2020-07-19 23:02:32,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:32,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099899323] [2020-07-19 23:02:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bcb271f [2020-07-19 23:02:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 513 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-19 23:02:33,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099899323] [2020-07-19 23:02:33,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028825058] [2020-07-19 23:02:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f8b86c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:33,294 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f8b86c issued 3 check-sat command(s) [2020-07-19 23:02:33,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:02:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-19 23:02:33,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:33,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 23:02:33,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404743185] [2020-07-19 23:02:33,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:02:33,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:02:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:02:33,413 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand 10 states. [2020-07-19 23:02:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:33,541 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-07-19 23:02:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:02:33,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 284 [2020-07-19 23:02:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:33,542 INFO L225 Difference]: With dead ends: 99 [2020-07-19 23:02:33,543 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:02:33,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:02:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:02:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:02:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:02:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:02:33,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-19 23:02:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:33,545 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:02:33,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:02:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:02:33,546 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:02:33,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:33,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:02:34,548 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 14 [2020-07-19 23:02:35,576 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 135 DAG size of output: 57 [2020-07-19 23:02:35,705 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 12 [2020-07-19 23:02:35,742 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:02:35,742 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:02:35,742 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:02:35,743 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:02:35,743 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:02:35,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:02:35,743 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-19 23:02:35,743 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-19 23:02:35,743 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|))) [2020-07-19 23:02:35,744 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-19 23:02:35,744 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|)) [2020-07-19 23:02:35,744 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse0 (= ackermann_~m |ackermann_#in~m|)) (.cse1 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse8 (and (<= 3 |ackermann_#in~m|) .cse0 .cse1)) (.cse9 (<= |ackermann_#t~ret1| 5)) (.cse5 (<= 3 |ackermann_#t~ret1|)) (.cse6 (<= |ackermann_#t~ret1| 3)) (.cse7 (<= |ackermann_#in~m| 1)) (.cse4 (<= |ackermann_#in~n| 1)) (.cse2 (<= 5 |ackermann_#t~ret1|)) (.cse3 (<= 3 |ackermann_#in~n|))) (and (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse0 .cse6 .cse1) .cse7 .cse8 (and .cse0 .cse9 .cse1 .cse2 (<= 2 |ackermann_#in~n|))) (or (not (<= |ackermann_#in~n| 0)) .cse8) (or (<= 2 |ackermann_#in~m|) (not .cse4) (<= |ackermann_#t~ret1| 2)) (let ((.cse10 (<= 1 |ackermann_#in~m|))) (or (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 .cse9 .cse1 .cse2 .cse10) (and .cse5 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2) .cse10) (not .cse7) (and .cse4 .cse0 .cse1 (<= 2 |ackermann_#t~ret1|) .cse10) (and (<= 6 |ackermann_#in~n|) .cse0 .cse1 .cse2 .cse10) (and .cse0 .cse1 (<= 5 |ackermann_#in~n|) (<= |ackermann_#t~ret1| 6) .cse10 (<= 6 |ackermann_#t~ret1|)) (and .cse0 .cse1 (<= |ackermann_#t~ret1| 4) .cse3 .cse10 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|))))))) [2020-07-19 23:02:35,744 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-19 23:02:35,745 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-19 23:02:35,745 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-19 23:02:35,745 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-19 23:02:35,745 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-19 23:02:35,745 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-19 23:02:35,746 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-19 23:02:35,747 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-19 23:02:35,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:02:35 BoogieIcfgContainer [2020-07-19 23:02:35,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:02:35,753 INFO L168 Benchmark]: Toolchain (without parser) took 21438.22 ms. Allocated memory was 145.8 MB in the beginning and 536.3 MB in the end (delta: 390.6 MB). Free memory was 102.5 MB in the beginning and 254.0 MB in the end (delta: -151.5 MB). Peak memory consumption was 361.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,754 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.46 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,754 INFO L168 Benchmark]: Boogie Preprocessor took 25.94 ms. Allocated memory is still 145.8 MB. Free memory was 92.1 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,755 INFO L168 Benchmark]: RCFGBuilder took 351.54 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 90.6 MB in the beginning and 170.1 MB in the end (delta: -79.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,756 INFO L168 Benchmark]: TraceAbstraction took 20798.60 ms. Allocated memory was 203.4 MB in the beginning and 536.3 MB in the end (delta: 332.9 MB). Free memory was 169.4 MB in the beginning and 254.0 MB in the end (delta: -84.5 MB). Peak memory consumption was 370.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:02:35,761 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.46 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 92.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.94 ms. Allocated memory is still 145.8 MB. Free memory was 92.1 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.54 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 90.6 MB in the beginning and 170.1 MB in the end (delta: -79.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20798.60 ms. Allocated memory was 203.4 MB in the beginning and 536.3 MB in the end (delta: 332.9 MB). Free memory was 169.4 MB in the beginning and 254.0 MB in the end (delta: -84.5 MB). Peak memory consumption was 370.7 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: 18.7s, OverallIterations: 11, TraceHistogramMax: 42, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 441 SDslu, 2206 SDs, 0 SdLazy, 5096 SolverSat, 914 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2359 GetRequests, 1973 SyntacticMatches, 6 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=9, 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, 11 MinimizatonAttempts, 141 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 381 PreInvPairs, 584 NumberOfFragments, 240 HoareAnnotationTreeSize, 381 FomulaSimplifications, 49850 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 9 FomulaSimplificationsInter, 4009 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 3043 NumberOfCodeBlocks, 2855 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 3022 ConstructedInterpolants, 0 QuantifiedInterpolants, 1004584 SizeOfPredicates, 85 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 23563/28750 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...