/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:48:36,898 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 01:48:36,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:48:36,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:48:36,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:48:36,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:48:36,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:48:36,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:48:36,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:48:36,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:48:36,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:48:36,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:48:36,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:48:36,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:48:36,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:48:36,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:48:36,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:48:36,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:48:36,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:48:36,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:48:36,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:48:36,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:48:36,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:48:36,968 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:48:36,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:48:36,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:48:36,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:48:36,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:48:36,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:48:36,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:48:36,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:48:36,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:48:36,970 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:48:36,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:48:36,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:48:36,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:48:36,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:48:36,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:48:36,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:48:36,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:48:36,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:48:36,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:48:36,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:48:36,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:48:36,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:48:36,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:48:36,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:48:36,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:48:36,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:48:37,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:48:37,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:48:37,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:48:37,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:48:37,282 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:48:37,284 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 01:48:37,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d901da986/494b83728aff41b4bb70de0dd1c845ad/FLAG896e010ef [2020-07-20 01:48:37,900 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:48:37,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 01:48:37,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d901da986/494b83728aff41b4bb70de0dd1c845ad/FLAG896e010ef [2020-07-20 01:48:38,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d901da986/494b83728aff41b4bb70de0dd1c845ad [2020-07-20 01:48:38,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:48:38,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:48:38,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:48:38,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:48:38,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:48:38,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261545bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38, skipping insertion in model container [2020-07-20 01:48:38,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:48:38,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:48:38,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:48:38,437 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:48:38,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:48:38,468 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:48:38,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38 WrapperNode [2020-07-20 01:48:38,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:48:38,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:48:38,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:48:38,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:48:38,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... [2020-07-20 01:48:38,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:48:38,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:48:38,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:48:38,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:48:38,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:48:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:48:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:48:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:48:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:48:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:48:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:48:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:48:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:48:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:48:38,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:48:38,823 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 01:48:38,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:38 BoogieIcfgContainer [2020-07-20 01:48:38,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:48:38,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:48:38,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:48:38,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:48:38,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:48:38" (1/3) ... [2020-07-20 01:48:38,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c62a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:38, skipping insertion in model container [2020-07-20 01:48:38,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:48:38" (2/3) ... [2020-07-20 01:48:38,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c62a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:48:38, skipping insertion in model container [2020-07-20 01:48:38,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:48:38" (3/3) ... [2020-07-20 01:48:38,834 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-20 01:48:38,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:48:38,856 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:48:38,869 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:48:38,894 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:48:38,894 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:48:38,894 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:48:38,895 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:48:38,895 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:48:38,895 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:48:38,895 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:48:38,895 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:48:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 01:48:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:48:38,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:38,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:38,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-07-20 01:48:38,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:38,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425916394] [2020-07-20 01:48:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425916394] [2020-07-20 01:48:39,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:39,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 01:48:39,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936377900] [2020-07-20 01:48:39,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 01:48:39,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:39,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 01:48:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:48:39,070 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-07-20 01:48:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:39,096 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-20 01:48:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 01:48:39,097 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 01:48:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:39,106 INFO L225 Difference]: With dead ends: 29 [2020-07-20 01:48:39,106 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 01:48:39,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:48:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 01:48:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 01:48:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 01:48:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 01:48:39,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 01:48:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:39,152 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 01:48:39,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 01:48:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 01:48:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:48:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:39,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:48:39,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -15914692, now seen corresponding path program 1 times [2020-07-20 01:48:39,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:39,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275690409] [2020-07-20 01:48:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275690409] [2020-07-20 01:48:39,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:39,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:48:39,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458228530] [2020-07-20 01:48:39,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:48:39,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:48:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:48:39,210 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-07-20 01:48:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:39,228 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 01:48:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:48:39,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 01:48:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:39,230 INFO L225 Difference]: With dead ends: 19 [2020-07-20 01:48:39,230 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 01:48:39,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:48:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 01:48:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-20 01:48:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 01:48:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 01:48:39,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-20 01:48:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:39,237 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 01:48:39,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:48:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 01:48:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 01:48:39,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:39,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:39,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:48:39,239 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:39,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-07-20 01:48:39,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:39,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115532376] [2020-07-20 01:48:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115532376] [2020-07-20 01:48:39,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207089446] [2020-07-20 01:48:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15116c47 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:39,360 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15116c47 issued 2 check-sat command(s) [2020-07-20 01:48:39,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:48:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:39,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-20 01:48:39,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905014892] [2020-07-20 01:48:39,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:48:39,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:48:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:48:39,407 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-07-20 01:48:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:39,436 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-20 01:48:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:48:39,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 01:48:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:39,438 INFO L225 Difference]: With dead ends: 21 [2020-07-20 01:48:39,438 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 01:48:39,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:48:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 01:48:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 01:48:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 01:48:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 01:48:39,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 01:48:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:39,445 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 01:48:39,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:48:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 01:48:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:48:39,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:39,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:39,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:48:39,663 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2020-07-20 01:48:39,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:39,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259867823] [2020-07-20 01:48:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259867823] [2020-07-20 01:48:39,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736232890] [2020-07-20 01:48:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571853d2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:39,756 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571853d2 issued 2 check-sat command(s) [2020-07-20 01:48:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:48:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:39,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:39,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 01:48:39,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676968160] [2020-07-20 01:48:39,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:48:39,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:48:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:48:39,771 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-20 01:48:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:39,811 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-20 01:48:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:48:39,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 01:48:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:39,813 INFO L225 Difference]: With dead ends: 23 [2020-07-20 01:48:39,813 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:48:39,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:48:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:48:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-20 01:48:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 01:48:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 01:48:39,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-20 01:48:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:39,820 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 01:48:39,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:48:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 01:48:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 01:48:39,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:39,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:40,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,038 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2020-07-20 01:48:40,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:40,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116330778] [2020-07-20 01:48:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116330778] [2020-07-20 01:48:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080936236] [2020-07-20 01:48:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79bcb472 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,156 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79bcb472 issued 3 check-sat command(s) [2020-07-20 01:48:40,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:48:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:40,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 01:48:40,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786578722] [2020-07-20 01:48:40,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:48:40,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:48:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:48:40,172 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-07-20 01:48:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:40,206 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-20 01:48:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:48:40,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 01:48:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:40,208 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:48:40,208 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 01:48:40,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:48:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 01:48:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-20 01:48:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 01:48:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 01:48:40,214 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-20 01:48:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:40,215 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 01:48:40,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:48:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 01:48:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:48:40,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:40,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:40,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,421 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2020-07-20 01:48:40,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:40,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622932791] [2020-07-20 01:48:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622932791] [2020-07-20 01:48:40,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761611584] [2020-07-20 01:48:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f67eb0e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,547 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f67eb0e issued 3 check-sat command(s) [2020-07-20 01:48:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:40,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:48:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:40,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 01:48:40,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483071223] [2020-07-20 01:48:40,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:48:40,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:48:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:48:40,564 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-07-20 01:48:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:40,612 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-20 01:48:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:48:40,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 01:48:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:40,616 INFO L225 Difference]: With dead ends: 27 [2020-07-20 01:48:40,616 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 01:48:40,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:48:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 01:48:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 01:48:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:48:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 01:48:40,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-07-20 01:48:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:40,622 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 01:48:40,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:48:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 01:48:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:48:40,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:40,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:40,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,832 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2020-07-20 01:48:40,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:40,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804636464] [2020-07-20 01:48:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804636464] [2020-07-20 01:48:40,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493974647] [2020-07-20 01:48:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16502dc1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:40,979 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16502dc1 issued 3 check-sat command(s) [2020-07-20 01:48:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:48:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:40,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:40,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-20 01:48:40,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777562077] [2020-07-20 01:48:40,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:48:40,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:48:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:48:40,994 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-07-20 01:48:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:41,033 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-20 01:48:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:48:41,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 01:48:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:41,035 INFO L225 Difference]: With dead ends: 29 [2020-07-20 01:48:41,035 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:48:41,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:48:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:48:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 01:48:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 01:48:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 01:48:41,041 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-07-20 01:48:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:41,041 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 01:48:41,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:48:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 01:48:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:48:41,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:41,042 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:41,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 01:48:41,255 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2020-07-20 01:48:41,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105570424] [2020-07-20 01:48:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:41,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105570424] [2020-07-20 01:48:41,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234634263] [2020-07-20 01:48:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69adf88c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:41,383 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69adf88c issued 3 check-sat command(s) [2020-07-20 01:48:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:41,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:48:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:41,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:41,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-07-20 01:48:41,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906777886] [2020-07-20 01:48:41,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:48:41,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:41,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:48:41,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:48:41,400 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-07-20 01:48:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:41,429 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-20 01:48:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:48:41,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-20 01:48:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:41,431 INFO L225 Difference]: With dead ends: 31 [2020-07-20 01:48:41,431 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 01:48:41,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:48:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 01:48:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-20 01:48:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:48:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-20 01:48:41,436 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-07-20 01:48:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:41,437 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-20 01:48:41,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:48:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-20 01:48:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:48:41,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:41,438 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:41,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:41,653 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2020-07-20 01:48:41,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:41,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695101201] [2020-07-20 01:48:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:41,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695101201] [2020-07-20 01:48:41,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662429417] [2020-07-20 01:48:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13160932 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:41,788 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13160932 issued 3 check-sat command(s) [2020-07-20 01:48:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:48:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:41,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:41,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-07-20 01:48:41,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188667189] [2020-07-20 01:48:41,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:48:41,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:41,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:48:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:41,814 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-07-20 01:48:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:41,859 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-07-20 01:48:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:48:41,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-20 01:48:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:41,861 INFO L225 Difference]: With dead ends: 32 [2020-07-20 01:48:41,861 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 01:48:41,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:48:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 01:48:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 01:48:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:48:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 01:48:41,867 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-07-20 01:48:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:41,867 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 01:48:41,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:48:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 01:48:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:48:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:41,869 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:42,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:42,082 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2020-07-20 01:48:42,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:42,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650147147] [2020-07-20 01:48:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:42,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650147147] [2020-07-20 01:48:42,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658165344] [2020-07-20 01:48:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c89dde7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:48:42,317 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c89dde7 issued 4 check-sat command(s) [2020-07-20 01:48:42,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:48:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 01:48:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:48:42,344 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:48:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:42,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:48:42,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 01:48:42,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18826911] [2020-07-20 01:48:42,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:48:42,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:48:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:48:42,417 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-20 01:48:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:42,572 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 01:48:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:48:42,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-07-20 01:48:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:42,573 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:48:42,573 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:48:42,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:48:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:48:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 01:48:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:48:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-20 01:48:42,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-20 01:48:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:42,580 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-20 01:48:42,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:48:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-20 01:48:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:48:42,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:48:42,581 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:48:42,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 01:48:42,793 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:48:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:48:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2020-07-20 01:48:42,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:48:42,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433086082] [2020-07-20 01:48:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ee2cc77 [2020-07-20 01:48:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:48:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:48:42,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433086082] [2020-07-20 01:48:42,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:48:42,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 01:48:42,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517366058] [2020-07-20 01:48:42,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:48:42,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:48:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:48:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:48:42,929 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-07-20 01:48:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:48:42,984 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-20 01:48:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:48:42,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 01:48:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:48:42,986 INFO L225 Difference]: With dead ends: 29 [2020-07-20 01:48:42,986 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:48:42,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:48:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:48:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:48:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:48:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:48:42,988 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-20 01:48:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:48:42,989 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:48:42,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:48:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:48:42,989 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:48:42,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 01:48:42,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:48:43,118 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:48:43,119 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:48:43,119 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:48:43,119 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:48:43,119 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:48:43,119 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:48:43,119 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-20 01:48:43,120 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-20 01:48:43,120 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-07-20 01:48:43,120 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-20 01:48:43,123 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8) (<= main_~i~0 5)) (and (<= main_~sn~0 0) (<= 0 main_~sn~0) (<= main_~i~0 1) (<= 1 main_~i~0)) (and (<= main_~i~0 3) (<= 4 main_~sn~0) (<= 3 main_~i~0) (<= main_~sn~0 4)) (and (<= main_~sn~0 6) (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0)) (and (<= main_~sn~0 16) (<= 9 main_~i~0) (<= 16 main_~sn~0)) (and (<= 14 main_~sn~0) (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 12 main_~sn~0) (<= main_~i~0 7) (<= 7 main_~i~0) (<= main_~sn~0 12))) [2020-07-20 01:48:43,124 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (<= 16 main_~sn~0)) [2020-07-20 01:48:43,124 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 01:48:43,124 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 01:48:43,124 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 01:48:43,124 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 01:48:43,125 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 01:48:43,125 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 01:48:43,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:48:43 BoogieIcfgContainer [2020-07-20 01:48:43,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:48:43,156 INFO L168 Benchmark]: Toolchain (without parser) took 4911.83 ms. Allocated memory was 140.0 MB in the beginning and 244.3 MB in the end (delta: 104.3 MB). Free memory was 104.4 MB in the beginning and 178.8 MB in the end (delta: -74.4 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:48:43,157 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 140.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 01:48:43,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.29 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 95.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:48:43,158 INFO L168 Benchmark]: Boogie Preprocessor took 30.25 ms. Allocated memory is still 140.0 MB. Free memory was 95.0 MB in the beginning and 93.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:48:43,159 INFO L168 Benchmark]: RCFGBuilder took 327.14 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 172.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:48:43,160 INFO L168 Benchmark]: TraceAbstraction took 4325.51 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 171.1 MB in the beginning and 178.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:48:43,164 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 140.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.29 ms. Allocated memory is still 140.0 MB. Free memory was 103.9 MB in the beginning and 95.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.25 ms. Allocated memory is still 140.0 MB. Free memory was 95.0 MB in the beginning and 93.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.14 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 172.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4325.51 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 171.1 MB in the beginning and 178.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((8 <= sn && 5 <= i) && sn <= 8) && i <= 5) || (((sn <= 0 && 0 <= sn) && i <= 1) && 1 <= i)) || (((i <= 3 && 4 <= sn) && 3 <= i) && sn <= 4)) || (((sn <= 6 && i <= 4) && 6 <= sn) && 4 <= i)) || ((sn <= 16 && 9 <= i) && 16 <= sn)) || (((14 <= sn && i <= 8) && 8 <= i) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && 6 <= i) && i <= 6)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((12 <= sn && i <= 7) && 7 <= i) && sn <= 12) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 37 SDslu, 380 SDs, 0 SdLazy, 276 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 352 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 8 NumberOfNonLiveVariables, 312 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 81/489 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...