/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:46,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:46,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:46,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-19 23:17:46,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:46,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:46,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:46,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:46,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:46,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:46,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:46,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:46,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:46,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:46,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:46,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:46,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:17:46,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:46,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:46,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:46,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:17:46,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:46,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:46,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:46,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:46,362 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:46,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:46,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:46,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:46,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:46,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:46,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:46,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:46,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:46,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:46,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:46,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:46,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:46,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:46,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:46,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:46,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:46,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:46,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:46,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:46,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:17:46,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:46,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:46,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:46,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:46,713 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:46,714 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-19 23:17:46,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc99ca34/a5c657123e5447d8b15f336e807d947c/FLAG9c3491ee3 [2020-07-19 23:17:47,221 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:47,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-19 23:17:47,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc99ca34/a5c657123e5447d8b15f336e807d947c/FLAG9c3491ee3 [2020-07-19 23:17:47,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dc99ca34/a5c657123e5447d8b15f336e807d947c [2020-07-19 23:17:47,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:47,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:47,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:47,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:47,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:47,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61675e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47, skipping insertion in model container [2020-07-19 23:17:47,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:47,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:17:47,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:47,885 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:17:47,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:47,933 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:17:47,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47 WrapperNode [2020-07-19 23:17:47,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:47,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:17:47,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:17:47,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:17:47,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... [2020-07-19 23:17:47,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:17:47,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:17:47,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:17:47,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:17:47,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:17:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:17:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-19 23:17:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:17:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:17:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-19 23:17:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:17:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:17:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:17:48,396 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:17:48,396 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:17:48,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:48 BoogieIcfgContainer [2020-07-19 23:17:48,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:17:48,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:17:48,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:17:48,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:17:48,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:47" (1/3) ... [2020-07-19 23:17:48,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e068ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:48, skipping insertion in model container [2020-07-19 23:17:48,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:47" (2/3) ... [2020-07-19 23:17:48,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e068ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:48, skipping insertion in model container [2020-07-19 23:17:48,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:48" (3/3) ... [2020-07-19 23:17:48,429 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-07-19 23:17:48,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:17:48,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:17:48,474 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:17:48,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:17:48,505 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:17:48,505 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:17:48,505 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:17:48,506 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:17:48,506 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:17:48,506 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:17:48,506 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:17:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:17:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:17:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,537 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-19 23:17:48,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142534703] [2020-07-19 23:17:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:17:48,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142534703] [2020-07-19 23:17:48,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:48,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:17:48,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954661229] [2020-07-19 23:17:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:17:48,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:17:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:48,819 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 23:17:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,923 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 23:17:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:48,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:17:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,934 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:17:48,935 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:17:48,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:17:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:17:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:17:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:17:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 23:17:48,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 23:17:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,988 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 23:17:48,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:17:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 23:17:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:17:48,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:17:48,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-19 23:17:48,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901947120] [2020-07-19 23:17:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:49,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901947120] [2020-07-19 23:17:49,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650547715] [2020-07-19 23:17:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@655a0e3f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,222 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@655a0e3f issued 2 check-sat command(s) [2020-07-19 23:17:49,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:49,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-19 23:17:49,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897945867] [2020-07-19 23:17:49,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:17:49,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:17:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:17:49,292 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-19 23:17:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:49,483 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 23:17:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:17:49,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-19 23:17:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:49,485 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:17:49,486 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:17:49,493 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 [2020-07-19 23:17:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:17:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:17:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:17:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:17:49,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 23:17:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:49,509 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:17:49,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:17:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:17:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:17:49,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:49,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:49,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:17:49,728 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-19 23:17:49,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:49,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842689922] [2020-07-19 23:17:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:49,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842689922] [2020-07-19 23:17:49,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025635929] [2020-07-19 23:17:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb39c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,927 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25cb39c issued 2 check-sat command(s) [2020-07-19 23:17:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:49,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-19 23:17:49,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860700899] [2020-07-19 23:17:49,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:17:49,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:17:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:17:49,972 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-19 23:17:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:50,088 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 23:17:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:17:50,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-19 23:17:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:50,091 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:17:50,091 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:17:50,092 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 [2020-07-19 23:17:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:17:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:17:50,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:17:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 23:17:50,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 23:17:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,100 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 23:17:50,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:17:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 23:17:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:17:50,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-19 23:17:50,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315527804] [2020-07-19 23:17:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:50,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315527804] [2020-07-19 23:17:50,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835386898] [2020-07-19 23:17:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2b569 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,588 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39b2b569 issued 2 check-sat command(s) [2020-07-19 23:17:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:17:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:50,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:50,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-19 23:17:50,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196428651] [2020-07-19 23:17:50,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:17:50,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:50,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:17:50,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:50,623 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-19 23:17:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:50,710 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 23:17:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:50,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-19 23:17:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:50,712 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:17:50,712 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:17:50,713 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 [2020-07-19 23:17:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:17:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:17:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:17:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:17:50,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 23:17:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,721 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:17:50,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:17:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:17:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 23:17:50,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,723 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,929 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-19 23:17:50,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472515795] [2020-07-19 23:17:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472515795] [2020-07-19 23:17:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30252781] [2020-07-19 23:17:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2c22cb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,161 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f2c22cb issued 2 check-sat command(s) [2020-07-19 23:17:51,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:51,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:51,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-19 23:17:51,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991099370] [2020-07-19 23:17:51,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:51,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:51,197 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-19 23:17:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:51,301 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 23:17:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:17:51,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-19 23:17:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:51,304 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:17:51,304 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:17:51,305 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 [2020-07-19 23:17:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:17:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:17:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:17:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 23:17:51,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 23:17:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:51,312 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 23:17:51,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 23:17:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 23:17:51,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:51,314 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:51,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,520 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-19 23:17:51,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:51,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852896450] [2020-07-19 23:17:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:51,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852896450] [2020-07-19 23:17:51,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124818281] [2020-07-19 23:17:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d9db37 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,849 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d9db37 issued 2 check-sat command(s) [2020-07-19 23:17:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:51,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:51,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-19 23:17:51,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569384838] [2020-07-19 23:17:51,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:17:51,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:17:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:51,906 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-19 23:17:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:51,999 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 23:17:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:17:51,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-19 23:17:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:52,001 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:17:52,001 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:17:52,002 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 [2020-07-19 23:17:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:17:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:17:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:17:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:17:52,008 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 23:17:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:52,009 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:17:52,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:17:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:17:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 23:17:52,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:52,011 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:52,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:17:52,212 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-19 23:17:52,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:52,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709803065] [2020-07-19 23:17:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:52,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709803065] [2020-07-19 23:17:52,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174188653] [2020-07-19 23:17:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b020d88 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:52,453 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b020d88 issued 2 check-sat command(s) [2020-07-19 23:17:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:17:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:52,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:52,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-19 23:17:52,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56295881] [2020-07-19 23:17:52,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:17:52,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:17:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:17:52,512 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 23:17:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:52,643 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 23:17:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:17:52,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-19 23:17:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:52,645 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:17:52,645 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:17:52,646 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 [2020-07-19 23:17:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:17:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:17:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:17:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:17:52,653 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 23:17:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:52,653 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:17:52,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:17:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:17:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 23:17:52,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:52,655 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:52,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:52,871 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-19 23:17:52,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:52,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219874840] [2020-07-19 23:17:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:53,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219874840] [2020-07-19 23:17:53,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948851775] [2020-07-19 23:17:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a951a12 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,206 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a951a12 issued 2 check-sat command(s) [2020-07-19 23:17:53,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:17:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:53,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:53,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-19 23:17:53,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130996818] [2020-07-19 23:17:53,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:17:53,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:17:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:53,274 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-19 23:17:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:53,413 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 23:17:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:17:53,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-19 23:17:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:53,416 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:17:53,416 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:17:53,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:17:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:17:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 23:17:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:17:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 23:17:53,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 23:17:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:53,425 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 23:17:53,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:17:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 23:17:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 23:17:53,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:53,426 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:53,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,628 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-19 23:17:53,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:53,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675456886] [2020-07-19 23:17:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:53,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675456886] [2020-07-19 23:17:53,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387386749] [2020-07-19 23:17:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67824878 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,974 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67824878 issued 2 check-sat command(s) [2020-07-19 23:17:53,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:17:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:54,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:54,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-19 23:17:54,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811207636] [2020-07-19 23:17:54,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:17:54,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:17:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:17:54,037 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-19 23:17:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:54,223 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 23:17:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:17:54,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-19 23:17:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:54,225 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:17:54,225 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:17:54,226 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 [2020-07-19 23:17:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:17:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:17:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:17:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 23:17:54,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 23:17:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:54,234 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 23:17:54,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:17:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 23:17:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 23:17:54,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:54,236 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:54,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:17:54,450 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-19 23:17:54,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:54,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702023226] [2020-07-19 23:17:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:54,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702023226] [2020-07-19 23:17:54,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644608924] [2020-07-19 23:17:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2695424 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:54,855 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2695424 issued 2 check-sat command(s) [2020-07-19 23:17:54,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:17:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:54,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:54,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-19 23:17:54,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368939349] [2020-07-19 23:17:54,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:17:54,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:17:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:54,928 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-19 23:17:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:55,107 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 23:17:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:17:55,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-19 23:17:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:55,109 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:17:55,109 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 23:17:55,111 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 [2020-07-19 23:17:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 23:17:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 23:17:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:17:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 23:17:55,118 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 23:17:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:55,118 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 23:17:55,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:17:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 23:17:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:17:55,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:55,120 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:55,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:55,334 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:55,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-19 23:17:55,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:55,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630601531] [2020-07-19 23:17:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:55,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630601531] [2020-07-19 23:17:55,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165107946] [2020-07-19 23:17:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33048e9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:55,855 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33048e9 issued 2 check-sat command(s) [2020-07-19 23:17:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:17:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:55,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:55,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-19 23:17:55,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032348166] [2020-07-19 23:17:55,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:17:55,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:17:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:17:55,899 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-19 23:17:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:56,099 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 23:17:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:17:56,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-19 23:17:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:56,101 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:17:56,102 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:17:56,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:17:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:17:56,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:17:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:17:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 23:17:56,114 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 23:17:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:56,115 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 23:17:56,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:17:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 23:17:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 23:17:56,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:56,117 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:56,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:56,335 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:56,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-19 23:17:56,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:56,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821446402] [2020-07-19 23:17:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:56,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821446402] [2020-07-19 23:17:56,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966581388] [2020-07-19 23:17:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b92a08e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:56,855 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b92a08e issued 2 check-sat command(s) [2020-07-19 23:17:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:17:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:56,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:56,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-19 23:17:56,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761213134] [2020-07-19 23:17:56,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:17:56,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:17:56,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:56,897 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-19 23:17:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:57,067 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 23:17:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:17:57,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-19 23:17:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:57,069 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:17:57,069 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:17:57,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:17:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:17:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:17:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:17:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 23:17:57,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 23:17:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:57,076 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 23:17:57,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:17:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 23:17:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 23:17:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:57,078 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:57,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:17:57,293 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-19 23:17:57,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:57,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216054775] [2020-07-19 23:17:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:57,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216054775] [2020-07-19 23:17:57,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96213878] [2020-07-19 23:17:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ac620c5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:57,898 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ac620c5 issued 2 check-sat command(s) [2020-07-19 23:17:57,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:17:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:57,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:57,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-19 23:17:57,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623367183] [2020-07-19 23:17:57,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:17:57,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:57,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:17:57,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:17:57,980 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-19 23:17:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:58,219 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 23:17:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:17:58,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-19 23:17:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:58,221 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:17:58,221 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:17:58,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:17:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:17:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 23:17:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 23:17:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 23:17:58,235 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 23:17:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:58,235 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 23:17:58,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:17:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 23:17:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 23:17:58,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:58,238 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:58,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:17:58,451 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-19 23:17:58,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:58,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93942070] [2020-07-19 23:17:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:59,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93942070] [2020-07-19 23:17:59,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752146340] [2020-07-19 23:17:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29f072f6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:59,114 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29f072f6 issued 2 check-sat command(s) [2020-07-19 23:17:59,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:17:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:59,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:59,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-19 23:17:59,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788999101] [2020-07-19 23:17:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:17:59,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:17:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:59,160 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-19 23:17:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:59,352 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 23:17:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:17:59,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-19 23:17:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:59,354 INFO L225 Difference]: With dead ends: 61 [2020-07-19 23:17:59,354 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:17:59,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:17:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:17:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:17:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:17:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:17:59,365 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 23:17:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:59,366 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:17:59,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:17:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:17:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:17:59,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:59,367 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:59,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:17:59,569 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-19 23:17:59,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:59,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593928619] [2020-07-19 23:17:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:17:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:18:00,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593928619] [2020-07-19 23:18:00,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271743176] [2020-07-19 23:18:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a721be No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:00,225 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a721be issued 2 check-sat command(s) [2020-07-19 23:18:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:18:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:18:00,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:00,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-19 23:18:00,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682879475] [2020-07-19 23:18:00,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:18:00,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:18:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:18:00,276 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-19 23:18:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:00,492 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 23:18:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:18:00,492 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-19 23:18:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:00,494 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:18:00,494 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:18:00,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:18:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:18:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 23:18:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:18:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 23:18:00,507 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 23:18:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:00,508 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 23:18:00,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:18:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 23:18:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 23:18:00,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:00,510 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:00,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:00,725 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-19 23:18:00,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:00,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503789400] [2020-07-19 23:18:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:18:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503789400] [2020-07-19 23:18:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159077313] [2020-07-19 23:18:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@488d079c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:01,541 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@488d079c issued 2 check-sat command(s) [2020-07-19 23:18:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 23:18:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:18:01,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:01,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-19 23:18:01,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996233388] [2020-07-19 23:18:01,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:18:01,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:18:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:18:01,610 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-19 23:18:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:01,846 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-19 23:18:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:18:01,847 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-19 23:18:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:01,848 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:18:01,848 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 23:18:01,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:18:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 23:18:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 23:18:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 23:18:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-19 23:18:01,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-19 23:18:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:01,863 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-19 23:18:01,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:18:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-19 23:18:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:18:01,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:01,866 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:02,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:18:02,077 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-19 23:18:02,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:02,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385599674] [2020-07-19 23:18:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:18:02,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385599674] [2020-07-19 23:18:02,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424912639] [2020-07-19 23:18:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56633ec7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:02,823 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56633ec7 issued 2 check-sat command(s) [2020-07-19 23:18:02,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 23:18:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:18:02,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:02,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-19 23:18:02,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066372348] [2020-07-19 23:18:02,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:18:02,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:18:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:18:02,873 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-19 23:18:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:03,165 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-19 23:18:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:18:03,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-19 23:18:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:03,167 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:18:03,167 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:18:03,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:18:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:18:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 23:18:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:18:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-19 23:18:03,183 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-19 23:18:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:03,184 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-19 23:18:03,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:18:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-19 23:18:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-19 23:18:03,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:03,186 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:03,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 23:18:03,401 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:03,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-19 23:18:03,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:03,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454206923] [2020-07-19 23:18:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:18:04,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454206923] [2020-07-19 23:18:04,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283264202] [2020-07-19 23:18:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4259c338 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:04,179 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4259c338 issued 2 check-sat command(s) [2020-07-19 23:18:04,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 23:18:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:18:04,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:04,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-19 23:18:04,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075779235] [2020-07-19 23:18:04,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:18:04,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:18:04,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:18:04,231 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-19 23:18:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:04,520 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-19 23:18:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:18:04,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-19 23:18:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:04,522 INFO L225 Difference]: With dead ends: 73 [2020-07-19 23:18:04,522 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 23:18:04,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:18:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 23:18:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-19 23:18:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 23:18:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-19 23:18:04,532 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-19 23:18:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:04,533 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-19 23:18:04,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:18:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-19 23:18:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-19 23:18:04,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:04,536 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:04,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:18:04,746 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-19 23:18:04,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:04,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751597425] [2020-07-19 23:18:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:18:05,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751597425] [2020-07-19 23:18:05,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118034555] [2020-07-19 23:18:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fb75139 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:05,625 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fb75139 issued 2 check-sat command(s) [2020-07-19 23:18:05,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:18:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:18:05,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:05,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-19 23:18:05,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292144793] [2020-07-19 23:18:05,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:18:05,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:18:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:18:05,684 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-19 23:18:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:06,000 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-19 23:18:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:18:06,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-19 23:18:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:06,002 INFO L225 Difference]: With dead ends: 76 [2020-07-19 23:18:06,002 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 23:18:06,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:18:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 23:18:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-19 23:18:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 23:18:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-19 23:18:06,014 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-19 23:18:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:06,014 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-19 23:18:06,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:18:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-19 23:18:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-19 23:18:06,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:06,016 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:06,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:06,229 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-19 23:18:06,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:06,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285485550] [2020-07-19 23:18:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:18:07,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285485550] [2020-07-19 23:18:07,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381050144] [2020-07-19 23:18:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b346fb4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:07,373 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b346fb4 issued 2 check-sat command(s) [2020-07-19 23:18:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 23:18:07,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:18:07,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:07,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-19 23:18:07,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106523152] [2020-07-19 23:18:07,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:18:07,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:18:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:18:07,467 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-19 23:18:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:07,891 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-19 23:18:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:18:07,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-19 23:18:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:07,894 INFO L225 Difference]: With dead ends: 79 [2020-07-19 23:18:07,894 INFO L226 Difference]: Without dead ends: 75 [2020-07-19 23:18:07,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:18:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-19 23:18:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-19 23:18:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 23:18:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-19 23:18:07,907 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-19 23:18:07,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:07,907 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-19 23:18:07,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:18:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-19 23:18:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-19 23:18:07,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:07,911 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:08,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:08,117 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-19 23:18:08,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:08,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111781178] [2020-07-19 23:18:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ee699e2 [2020-07-19 23:18:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:18:08,161 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:18:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:18:08,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:18:08,280 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:18:08,280 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:18:08,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-19 23:18:08,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:18:08 BoogieIcfgContainer [2020-07-19 23:18:08,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:18:08,402 INFO L168 Benchmark]: Toolchain (without parser) took 20777.95 ms. Allocated memory was 143.7 MB in the beginning and 518.0 MB in the end (delta: 374.3 MB). Free memory was 101.2 MB in the beginning and 474.4 MB in the end (delta: -373.1 MB). Peak memory consumption was 354.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,403 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.64 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,412 INFO L168 Benchmark]: Boogie Preprocessor took 41.68 ms. Allocated memory is still 143.7 MB. Free memory was 91.6 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,413 INFO L168 Benchmark]: RCFGBuilder took 428.82 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 90.3 MB in the beginning and 167.8 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,413 INFO L168 Benchmark]: TraceAbstraction took 19990.70 ms. Allocated memory was 200.3 MB in the beginning and 518.0 MB in the end (delta: 317.7 MB). Free memory was 167.8 MB in the beginning and 474.4 MB in the end (delta: -306.5 MB). Peak memory consumption was 364.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:08,421 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.64 ms. Allocated memory is still 143.7 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.68 ms. Allocated memory is still 143.7 MB. Free memory was 91.6 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.82 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 90.3 MB in the beginning and 167.8 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19990.70 ms. Allocated memory was 200.3 MB in the beginning and 518.0 MB in the end (delta: 317.7 MB). Free memory was 167.8 MB in the beginning and 474.4 MB in the end (delta: -306.5 MB). Peak memory consumption was 364.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; VAL [a=20, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=20, b=0, sum(a, b)=20] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=20, b=0, result=20] [L16] __VERIFIER_error() VAL [a=20, b=0, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.7s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 883 SDslu, 1148 SDs, 0 SdLazy, 821 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2308 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2245 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 602160 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3146 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...