/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 BIGGEST_EQUIVALENCE_CLASS --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-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:44:39,397 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 05:44:39,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:44:39,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:44:39,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:44:39,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:44:39,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:44:39,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:44:39,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:44:39,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:44:39,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:44:39,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:44:39,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:44:39,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:44:39,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:44:39,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:44:39,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:44:39,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:44:39,482 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 05:44:39,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:44:39,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:44:39,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:44:39,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:44:39,503 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:44:39,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:44:39,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:44:39,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:44:39,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:44:39,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:44:39,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:44:39,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:44:39,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:44:39,505 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:44:39,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:44:39,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:44:39,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:44:39,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:44:39,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:44:39,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:44:39,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:44:39,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:44:39,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:44:39,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:44:39,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:44:39,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:44:39,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:44:39,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:44:39,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:44:39,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:44:39,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:44:39,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:44:39,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:44:39,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:44:39,873 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:44:39,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 05:44:39,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6bdffb2b/a915188df5a24b0bab1fe4c7d02f9ed6/FLAG35d5d3c92 [2020-07-20 05:44:40,576 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:44:40,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 05:44:40,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6bdffb2b/a915188df5a24b0bab1fe4c7d02f9ed6/FLAG35d5d3c92 [2020-07-20 05:44:40,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6bdffb2b/a915188df5a24b0bab1fe4c7d02f9ed6 [2020-07-20 05:44:40,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:44:40,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:44:40,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:40,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:44:40,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:44:40,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:40" (1/1) ... [2020-07-20 05:44:40,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52122597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:40, skipping insertion in model container [2020-07-20 05:44:40,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:44:40" (1/1) ... [2020-07-20 05:44:40,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:44:40,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:44:41,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:41,159 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:44:41,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:44:41,197 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:44:41,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41 WrapperNode [2020-07-20 05:44:41,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:44:41,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:44:41,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:44:41,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:44:41,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (1/1) ... [2020-07-20 05:44:41,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:44:41,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:44:41,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:44:41,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:44:41,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (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 05:44:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:44:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:44:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 05:44:41,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:44:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:44:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 05:44:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:44:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:44:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:44:41,645 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:44:41,645 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:44:41,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:41 BoogieIcfgContainer [2020-07-20 05:44:41,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:44:41,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:44:41,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:44:41,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:44:41,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:44:40" (1/3) ... [2020-07-20 05:44:41,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cab522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:41, skipping insertion in model container [2020-07-20 05:44:41,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:44:41" (2/3) ... [2020-07-20 05:44:41,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cab522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:44:41, skipping insertion in model container [2020-07-20 05:44:41,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:44:41" (3/3) ... [2020-07-20 05:44:41,665 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-20 05:44:41,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:44:41,695 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:44:41,716 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:44:41,749 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:44:41,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:44:41,750 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:44:41,750 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:44:41,750 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:44:41,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:44:41,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:44:41,751 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:44:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 05:44:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 05:44:41,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:41,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:41,790 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:41,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 05:44:41,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:41,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123742534] [2020-07-20 05:44:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,106 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 05:44:42,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123742534] [2020-07-20 05:44:42,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:44:42,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:44:42,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508949685] [2020-07-20 05:44:42,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:44:42,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:44:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:44:42,141 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 05:44:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:42,267 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 05:44:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:44:42,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 05:44:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:42,285 INFO L225 Difference]: With dead ends: 30 [2020-07-20 05:44:42,286 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 05:44:42,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:44:42,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 05:44:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 05:44:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 05:44:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 05:44:42,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 05:44:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:42,367 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 05:44:42,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:44:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 05:44:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:44:42,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:42,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:42,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:44:42,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 05:44:42,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:42,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739650141] [2020-07-20 05:44:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:42,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739650141] [2020-07-20 05:44:42,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422650452] [2020-07-20 05:44:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@762c3165 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:42,669 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@762c3165 issued 2 check-sat command(s) [2020-07-20 05:44:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:44:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:44:42,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:42,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 05:44:42,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776115311] [2020-07-20 05:44:42,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:44:42,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:44:42,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:44:42,790 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 05:44:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:42,873 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 05:44:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:44:42,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 05:44:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:42,875 INFO L225 Difference]: With dead ends: 25 [2020-07-20 05:44:42,876 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 05:44:42,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 05:44:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 05:44:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:44:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 05:44:42,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 05:44:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:42,888 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 05:44:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:44:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 05:44:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:44:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:42,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:43,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 05:44:43,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 05:44:43,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:43,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153037055] [2020-07-20 05:44:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:43,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153037055] [2020-07-20 05:44:43,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902197860] [2020-07-20 05:44:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@430f9257 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 05:44:43,372 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@430f9257 issued 2 check-sat command(s) [2020-07-20 05:44:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:43,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:44:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 05:44:43,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:43,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 05:44:43,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872132278] [2020-07-20 05:44:43,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:44:43,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:44:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:44:43,416 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 05:44:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:43,515 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 05:44:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:44:43,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 05:44:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:43,518 INFO L225 Difference]: With dead ends: 28 [2020-07-20 05:44:43,518 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:44:43,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:44:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 05:44:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 05:44:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 05:44:43,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 05:44:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:43,529 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 05:44:43,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:44:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 05:44:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:44:43,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:43,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:43,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:43,750 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 05:44:43,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:43,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540693680] [2020-07-20 05:44:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:43,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540693680] [2020-07-20 05:44:43,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075291505] [2020-07-20 05:44:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a684c43 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:44,026 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7a684c43 issued 2 check-sat command(s) [2020-07-20 05:44:44,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:44,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:44:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 05:44:44,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:44,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 05:44:44,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613137685] [2020-07-20 05:44:44,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:44:44,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:44:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:44:44,070 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 05:44:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:44,167 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 05:44:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:44:44,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 05:44:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:44,169 INFO L225 Difference]: With dead ends: 31 [2020-07-20 05:44:44,170 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 05:44:44,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 05:44:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 05:44:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:44:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 05:44:44,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 05:44:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:44,178 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 05:44:44,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:44:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 05:44:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 05:44:44,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:44,180 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:44,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:44,395 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 05:44:44,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:44,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191564072] [2020-07-20 05:44:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:44,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191564072] [2020-07-20 05:44:44,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271678058] [2020-07-20 05:44:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a70f5c8 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 05:44:44,745 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a70f5c8 issued 2 check-sat command(s) [2020-07-20 05:44:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:44:44,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 05:44:44,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:44,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 05:44:44,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361893700] [2020-07-20 05:44:44,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:44:44,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:44:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:44:44,789 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 05:44:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:44,904 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 05:44:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:44:44,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 05:44:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:44,907 INFO L225 Difference]: With dead ends: 34 [2020-07-20 05:44:44,907 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:44:44,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:44:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 05:44:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:44:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 05:44:44,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 05:44:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:44,925 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 05:44:44,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:44:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 05:44:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 05:44:44,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:44,933 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:45,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:45,136 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 05:44:45,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:45,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599201421] [2020-07-20 05:44:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:45,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599201421] [2020-07-20 05:44:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395994619] [2020-07-20 05:44:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@740ff203 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:45,524 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@740ff203 issued 2 check-sat command(s) [2020-07-20 05:44:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 05:44:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 05:44:45,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:45,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 05:44:45,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709600477] [2020-07-20 05:44:45,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:44:45,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:45,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:44:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:44:45,594 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 05:44:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:45,727 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 05:44:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:44:45,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 05:44:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:45,730 INFO L225 Difference]: With dead ends: 37 [2020-07-20 05:44:45,730 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 05:44:45,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:44:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 05:44:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 05:44:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:44:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 05:44:45,739 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 05:44:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:45,740 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 05:44:45,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:44:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 05:44:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 05:44:45,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:45,742 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:45,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 05:44:45,956 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 05:44:45,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:45,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728784974] [2020-07-20 05:44:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:46,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728784974] [2020-07-20 05:44:46,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925326703] [2020-07-20 05:44:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@328f095 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 05:44:46,267 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@328f095 issued 2 check-sat command(s) [2020-07-20 05:44:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 05:44:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 05:44:46,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:46,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 05:44:46,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542428444] [2020-07-20 05:44:46,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 05:44:46,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 05:44:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:44:46,318 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 05:44:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:46,451 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 05:44:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:44:46,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 05:44:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:46,453 INFO L225 Difference]: With dead ends: 40 [2020-07-20 05:44:46,453 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 05:44:46,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:44:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 05:44:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 05:44:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 05:44:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 05:44:46,463 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 05:44:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:46,463 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 05:44:46,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 05:44:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 05:44:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 05:44:46,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:46,465 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:46,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:46,682 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:46,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 05:44:46,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:46,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505134200] [2020-07-20 05:44:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:47,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505134200] [2020-07-20 05:44:47,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71856359] [2020-07-20 05:44:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2576f3eb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:47,069 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2576f3eb issued 2 check-sat command(s) [2020-07-20 05:44:47,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:47,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 05:44:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 05:44:47,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:47,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 05:44:47,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795702351] [2020-07-20 05:44:47,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:44:47,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:44:47,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:44:47,119 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 05:44:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:47,290 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 05:44:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 05:44:47,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 05:44:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:47,292 INFO L225 Difference]: With dead ends: 43 [2020-07-20 05:44:47,292 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 05:44:47,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:44:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 05:44:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 05:44:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:44:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 05:44:47,312 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 05:44:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:47,313 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 05:44:47,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:44:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 05:44:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 05:44:47,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:47,318 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:47,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:47,532 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 05:44:47,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:47,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138073665] [2020-07-20 05:44:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:47,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138073665] [2020-07-20 05:44:47,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209424703] [2020-07-20 05:44:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@319c9b22 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 05:44:47,884 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@319c9b22 issued 2 check-sat command(s) [2020-07-20 05:44:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 05:44:47,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 05:44:47,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:47,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 05:44:47,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088939678] [2020-07-20 05:44:47,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:44:47,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:44:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:44:47,936 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 05:44:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:48,124 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 05:44:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 05:44:48,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 05:44:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:48,127 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:44:48,127 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:44:48,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:44:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:44:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 05:44:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:44:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 05:44:48,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 05:44:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:48,138 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 05:44:48,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:44:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 05:44:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 05:44:48,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:48,140 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:48,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 05:44:48,357 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 05:44:48,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:48,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38696338] [2020-07-20 05:44:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:48,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38696338] [2020-07-20 05:44:48,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331617250] [2020-07-20 05:44:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9ae9ccc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:48,712 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9ae9ccc issued 2 check-sat command(s) [2020-07-20 05:44:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 05:44:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 05:44:48,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:48,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 05:44:48,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060227303] [2020-07-20 05:44:48,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:44:48,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:44:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:44:48,751 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 05:44:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:48,910 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 05:44:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 05:44:48,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 05:44:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:48,913 INFO L225 Difference]: With dead ends: 49 [2020-07-20 05:44:48,913 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 05:44:48,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:44:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 05:44:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 05:44:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:44:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 05:44:48,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 05:44:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:48,921 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 05:44:48,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:44:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 05:44:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 05:44:48,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:44:48,923 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:44:49,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:49,138 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:44:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:44:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 05:44:49,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:44:49,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060576037] [2020-07-20 05:44:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786ea2bd [2020-07-20 05:44:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:44:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-07-20 05:44:50,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060576037] [2020-07-20 05:44:50,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742511244] [2020-07-20 05:44:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64e3910e 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 [2020-07-20 05:44:50,182 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64e3910e issued 4 check-sat command(s) [2020-07-20 05:44:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:44:50,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 115 conjunts are in the unsatisfiable core [2020-07-20 05:44:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:44:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 05:44:51,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:44:51,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2020-07-20 05:44:51,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331042960] [2020-07-20 05:44:51,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 05:44:51,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:44:51,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 05:44:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 05:44:51,478 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 52 states. [2020-07-20 05:44:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:44:53,462 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-20 05:44:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:44:53,463 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 73 [2020-07-20 05:44:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:44:53,464 INFO L225 Difference]: With dead ends: 48 [2020-07-20 05:44:53,464 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:44:53,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=673, Invalid=5027, Unknown=0, NotChecked=0, Total=5700 [2020-07-20 05:44:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:44:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:44:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:44:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:44:53,469 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-07-20 05:44:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:44:53,470 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:44:53,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 05:44:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:44:53,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:44:53,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:44:53,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:44:53,714 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:44:53,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:44:53,714 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:44:53,715 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:44:53,715 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:44:53,715 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:44:53,715 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:44:53,715 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-20 05:44:53,715 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 05:44:53,715 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 05:44:53,715 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 05:44:53,716 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 05:44:53,716 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 05:44:53,716 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 05:44:53,716 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:44:53,716 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 05:44:53,716 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 05:44:53,717 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 10) (<= 10 main_~a~0)) [2020-07-20 05:44:53,717 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 05:44:53,717 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 05:44:53,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:44:53 BoogieIcfgContainer [2020-07-20 05:44:53,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:44:53,725 INFO L168 Benchmark]: Toolchain (without parser) took 12827.04 ms. Allocated memory was 136.3 MB in the beginning and 321.9 MB in the end (delta: 185.6 MB). Free memory was 101.4 MB in the beginning and 89.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 197.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,726 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.80 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,728 INFO L168 Benchmark]: Boogie Preprocessor took 29.76 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,729 INFO L168 Benchmark]: RCFGBuilder took 421.55 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 90.4 MB in the beginning and 170.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,730 INFO L168 Benchmark]: TraceAbstraction took 12069.87 ms. Allocated memory was 201.9 MB in the beginning and 321.9 MB in the end (delta: 120.1 MB). Free memory was 169.7 MB in the beginning and 89.2 MB in the end (delta: 80.5 MB). Peak memory consumption was 200.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:44:53,734 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.80 ms. Allocated memory is still 136.3 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.76 ms. Allocated memory is still 136.3 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.55 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 90.4 MB in the beginning and 170.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12069.87 ms. Allocated memory was 201.9 MB in the beginning and 321.9 MB in the end (delta: 120.1 MB). Free memory was 169.7 MB in the beginning and 89.2 MB in the end (delta: 80.5 MB). Peak memory consumption was 200.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 284 SDslu, 856 SDs, 0 SdLazy, 1037 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 795 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 933 NumberOfCodeBlocks, 748 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 912 ConstructedInterpolants, 0 QuantifiedInterpolants, 165192 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1075 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 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...