/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:15,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:15,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:15,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:15,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:15,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:15,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:15,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:15,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:15,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:15,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:15,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:15,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:15,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:15,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:15,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:15,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:15,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:15,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:15,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:15,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:15,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:15,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:15,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:15,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:50:15,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:50:15,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:50:15,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:50:15,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:50:15,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:50:15,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:50:15,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:50:15,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:50:15,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:50:15,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:50:15,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:50:15,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:50:15,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:50:15,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:15,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:15,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:15,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:50:15,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:15,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:15,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:15,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:15,529 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:15,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:15,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:15,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:15,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:15,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:15,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:15,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:15,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:15,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:15,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:15,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:15,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:15,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:15,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:15,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:15,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:15,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:15,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:15,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:15,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:15,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:15,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:15,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:15,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:15,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 [2020-07-20 13:50:15,876 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:15,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:15,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:15,916 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:15,917 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:15,920 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-07-20 13:50:16,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e970fa5/c6da4aeb63494febaa1d4257d5d90361/FLAG930cff4c1 [2020-07-20 13:50:16,633 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:16,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-07-20 13:50:16,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e970fa5/c6da4aeb63494febaa1d4257d5d90361/FLAG930cff4c1 [2020-07-20 13:50:16,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34e970fa5/c6da4aeb63494febaa1d4257d5d90361 [2020-07-20 13:50:16,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:16,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:16,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:16,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:16,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:16,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:16" (1/1) ... [2020-07-20 13:50:16,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196af3e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:16, skipping insertion in model container [2020-07-20 13:50:16,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:16" (1/1) ... [2020-07-20 13:50:16,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:17,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:17,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:17,235 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:17,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:17,316 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:17,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17 WrapperNode [2020-07-20 13:50:17,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:17,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:17,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:17,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:17,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... [2020-07-20 13:50:17,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:17,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:17,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:17,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:17,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:17,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:17,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:17,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:17,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:17,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:17,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:17,896 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:17,897 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 13:50:17,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:17 BoogieIcfgContainer [2020-07-20 13:50:17,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:17,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:17,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:17,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:17,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:16" (1/3) ... [2020-07-20 13:50:17,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301dc00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:17, skipping insertion in model container [2020-07-20 13:50:17,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:17" (2/3) ... [2020-07-20 13:50:17,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301dc00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:17, skipping insertion in model container [2020-07-20 13:50:17,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:17" (3/3) ... [2020-07-20 13:50:17,919 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-07-20 13:50:17,938 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:17,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:17,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:18,037 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:18,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:18,038 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:18,038 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:18,038 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:18,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:18,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:18,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 13:50:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:50:18,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:18,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:18,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-07-20 13:50:18,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:18,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477736276] [2020-07-20 13:50:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:18,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:18,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:18,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:18,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:18,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477736276] [2020-07-20 13:50:18,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:18,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:18,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526576861] [2020-07-20 13:50:18,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:18,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:18,327 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 13:50:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:18,414 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-07-20 13:50:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:18,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 13:50:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:18,436 INFO L225 Difference]: With dead ends: 63 [2020-07-20 13:50:18,436 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:50:18,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:50:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-07-20 13:50:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 13:50:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-07-20 13:50:18,510 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-07-20 13:50:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:18,512 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-07-20 13:50:18,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-07-20 13:50:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:50:18,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:18,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:18,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:18,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-07-20 13:50:18,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:18,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703181120] [2020-07-20 13:50:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:18,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:18,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:18,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703181120] [2020-07-20 13:50:18,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:18,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:18,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23704345] [2020-07-20 13:50:18,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:18,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:18,845 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-07-20 13:50:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:18,877 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-07-20 13:50:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:18,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 13:50:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:18,880 INFO L225 Difference]: With dead ends: 77 [2020-07-20 13:50:18,880 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:50:18,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:50:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-07-20 13:50:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:50:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-07-20 13:50:18,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-07-20 13:50:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:18,894 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-07-20 13:50:18,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-07-20 13:50:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:50:18,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:18,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:19,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,113 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-07-20 13:50:19,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:19,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980331102] [2020-07-20 13:50:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:19,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:19,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:19,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980331102] [2020-07-20 13:50:19,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:19,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:19,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937796527] [2020-07-20 13:50:19,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:19,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,192 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-07-20 13:50:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:19,237 INFO L93 Difference]: Finished difference Result 85 states and 143 transitions. [2020-07-20 13:50:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:19,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 13:50:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:19,241 INFO L225 Difference]: With dead ends: 85 [2020-07-20 13:50:19,241 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 13:50:19,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 13:50:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-20 13:50:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:50:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-20 13:50:19,256 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 17 [2020-07-20 13:50:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:19,257 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-20 13:50:19,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-20 13:50:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:50:19,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:19,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:19,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1114599061, now seen corresponding path program 1 times [2020-07-20 13:50:19,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:19,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825356843] [2020-07-20 13:50:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:19,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:19,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825356843] [2020-07-20 13:50:19,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:19,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:19,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462264782] [2020-07-20 13:50:19,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:19,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,552 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-20 13:50:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:19,613 INFO L93 Difference]: Finished difference Result 141 states and 241 transitions. [2020-07-20 13:50:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:19,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 13:50:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:19,620 INFO L225 Difference]: With dead ends: 141 [2020-07-20 13:50:19,620 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 13:50:19,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 13:50:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-07-20 13:50:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 13:50:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 138 transitions. [2020-07-20 13:50:19,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 138 transitions. Word has length 17 [2020-07-20 13:50:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:19,659 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 138 transitions. [2020-07-20 13:50:19,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 138 transitions. [2020-07-20 13:50:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 13:50:19,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:19,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:19,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash 586074550, now seen corresponding path program 1 times [2020-07-20 13:50:19,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:19,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74755809] [2020-07-20 13:50:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:19,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:19,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:19,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:19,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74755809] [2020-07-20 13:50:19,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:19,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:19,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092115806] [2020-07-20 13:50:19,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:19,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,939 INFO L87 Difference]: Start difference. First operand 83 states and 138 transitions. Second operand 3 states. [2020-07-20 13:50:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:19,982 INFO L93 Difference]: Finished difference Result 151 states and 252 transitions. [2020-07-20 13:50:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:19,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 13:50:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:19,986 INFO L225 Difference]: With dead ends: 151 [2020-07-20 13:50:19,986 INFO L226 Difference]: Without dead ends: 149 [2020-07-20 13:50:19,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-07-20 13:50:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2020-07-20 13:50:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 13:50:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 190 transitions. [2020-07-20 13:50:20,005 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 190 transitions. Word has length 18 [2020-07-20 13:50:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:20,005 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 190 transitions. [2020-07-20 13:50:20,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 190 transitions. [2020-07-20 13:50:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 13:50:20,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:20,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:20,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,215 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1266132920, now seen corresponding path program 1 times [2020-07-20 13:50:20,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:20,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662294213] [2020-07-20 13:50:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:20,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:20,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662294213] [2020-07-20 13:50:20,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:20,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:20,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507127538] [2020-07-20 13:50:20,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:20,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:20,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:20,293 INFO L87 Difference]: Start difference. First operand 115 states and 190 transitions. Second operand 3 states. [2020-07-20 13:50:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:20,326 INFO L93 Difference]: Finished difference Result 267 states and 444 transitions. [2020-07-20 13:50:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:20,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 13:50:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:20,329 INFO L225 Difference]: With dead ends: 267 [2020-07-20 13:50:20,329 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 13:50:20,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 13:50:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-07-20 13:50:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-20 13:50:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 250 transitions. [2020-07-20 13:50:20,350 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 250 transitions. Word has length 18 [2020-07-20 13:50:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:20,351 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 250 transitions. [2020-07-20 13:50:20,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 250 transitions. [2020-07-20 13:50:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:20,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:20,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:20,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,567 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash 988657224, now seen corresponding path program 1 times [2020-07-20 13:50:20,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:20,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251470293] [2020-07-20 13:50:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:20,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:20,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:20,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:20,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251470293] [2020-07-20 13:50:20,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:20,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:20,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929372265] [2020-07-20 13:50:20,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:20,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:20,631 INFO L87 Difference]: Start difference. First operand 155 states and 250 transitions. Second operand 3 states. [2020-07-20 13:50:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:20,653 INFO L93 Difference]: Finished difference Result 275 states and 444 transitions. [2020-07-20 13:50:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:20,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 13:50:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:20,656 INFO L225 Difference]: With dead ends: 275 [2020-07-20 13:50:20,657 INFO L226 Difference]: Without dead ends: 273 [2020-07-20 13:50:20,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-20 13:50:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 223. [2020-07-20 13:50:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 13:50:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 354 transitions. [2020-07-20 13:50:20,680 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 354 transitions. Word has length 19 [2020-07-20 13:50:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:20,681 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 354 transitions. [2020-07-20 13:50:20,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 354 transitions. [2020-07-20 13:50:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:20,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:20,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:20,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,896 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1668715594, now seen corresponding path program 1 times [2020-07-20 13:50:20,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:20,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914560322] [2020-07-20 13:50:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:20,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:20,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:20,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914560322] [2020-07-20 13:50:20,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:20,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231736454] [2020-07-20 13:50:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:20,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:20,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:20,952 INFO L87 Difference]: Start difference. First operand 223 states and 354 transitions. Second operand 3 states. [2020-07-20 13:50:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:21,003 INFO L93 Difference]: Finished difference Result 515 states and 820 transitions. [2020-07-20 13:50:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:21,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 13:50:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:21,006 INFO L225 Difference]: With dead ends: 515 [2020-07-20 13:50:21,006 INFO L226 Difference]: Without dead ends: 297 [2020-07-20 13:50:21,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-20 13:50:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2020-07-20 13:50:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-07-20 13:50:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2020-07-20 13:50:21,032 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 19 [2020-07-20 13:50:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:21,032 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2020-07-20 13:50:21,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2020-07-20 13:50:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:50:21,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:21,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:21,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash 583818571, now seen corresponding path program 1 times [2020-07-20 13:50:21,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:21,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972713096] [2020-07-20 13:50:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:21,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:21,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972713096] [2020-07-20 13:50:21,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:21,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:21,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449909040] [2020-07-20 13:50:21,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:21,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:21,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:21,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,301 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand 3 states. [2020-07-20 13:50:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:21,330 INFO L93 Difference]: Finished difference Result 507 states and 776 transitions. [2020-07-20 13:50:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:21,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 13:50:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:21,334 INFO L225 Difference]: With dead ends: 507 [2020-07-20 13:50:21,335 INFO L226 Difference]: Without dead ends: 505 [2020-07-20 13:50:21,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-07-20 13:50:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 439. [2020-07-20 13:50:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-07-20 13:50:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 662 transitions. [2020-07-20 13:50:21,363 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 662 transitions. Word has length 20 [2020-07-20 13:50:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:21,364 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 662 transitions. [2020-07-20 13:50:21,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 662 transitions. [2020-07-20 13:50:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:50:21,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:21,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:21,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,584 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1263876941, now seen corresponding path program 1 times [2020-07-20 13:50:21,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:21,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088262584] [2020-07-20 13:50:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:21,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:21,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088262584] [2020-07-20 13:50:21,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:21,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:21,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876815987] [2020-07-20 13:50:21,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:21,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,633 INFO L87 Difference]: Start difference. First operand 439 states and 662 transitions. Second operand 3 states. [2020-07-20 13:50:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:21,669 INFO L93 Difference]: Finished difference Result 1003 states and 1512 transitions. [2020-07-20 13:50:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:21,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 13:50:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:21,674 INFO L225 Difference]: With dead ends: 1003 [2020-07-20 13:50:21,674 INFO L226 Difference]: Without dead ends: 569 [2020-07-20 13:50:21,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-07-20 13:50:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2020-07-20 13:50:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-07-20 13:50:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 822 transitions. [2020-07-20 13:50:21,705 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 822 transitions. Word has length 20 [2020-07-20 13:50:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:21,706 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 822 transitions. [2020-07-20 13:50:21,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 822 transitions. [2020-07-20 13:50:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:50:21,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:21,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:21,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,926 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash 918722557, now seen corresponding path program 1 times [2020-07-20 13:50:21,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:21,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506793666] [2020-07-20 13:50:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:21,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:21,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:21,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506793666] [2020-07-20 13:50:21,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:21,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:21,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664645758] [2020-07-20 13:50:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:21,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:21,992 INFO L87 Difference]: Start difference. First operand 567 states and 822 transitions. Second operand 3 states. [2020-07-20 13:50:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:22,042 INFO L93 Difference]: Finished difference Result 937 states and 1335 transitions. [2020-07-20 13:50:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:22,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 13:50:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:22,049 INFO L225 Difference]: With dead ends: 937 [2020-07-20 13:50:22,049 INFO L226 Difference]: Without dead ends: 935 [2020-07-20 13:50:22,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-07-20 13:50:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 871. [2020-07-20 13:50:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-07-20 13:50:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1238 transitions. [2020-07-20 13:50:22,093 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1238 transitions. Word has length 21 [2020-07-20 13:50:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:22,094 INFO L479 AbstractCegarLoop]: Abstraction has 871 states and 1238 transitions. [2020-07-20 13:50:22,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1238 transitions. [2020-07-20 13:50:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:50:22,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:22,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:22,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:22,313 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1598780927, now seen corresponding path program 1 times [2020-07-20 13:50:22,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:22,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899052817] [2020-07-20 13:50:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:22,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:22,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899052817] [2020-07-20 13:50:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:22,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308905107] [2020-07-20 13:50:22,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:22,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:22,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:22,371 INFO L87 Difference]: Start difference. First operand 871 states and 1238 transitions. Second operand 3 states. [2020-07-20 13:50:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:22,415 INFO L93 Difference]: Finished difference Result 1294 states and 1820 transitions. [2020-07-20 13:50:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:22,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 13:50:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:22,421 INFO L225 Difference]: With dead ends: 1294 [2020-07-20 13:50:22,421 INFO L226 Difference]: Without dead ends: 876 [2020-07-20 13:50:22,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-07-20 13:50:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 874. [2020-07-20 13:50:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-07-20 13:50:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1194 transitions. [2020-07-20 13:50:22,463 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1194 transitions. Word has length 21 [2020-07-20 13:50:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:22,464 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 1194 transitions. [2020-07-20 13:50:22,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1194 transitions. [2020-07-20 13:50:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:50:22,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:22,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:22,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:22,682 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash 587663677, now seen corresponding path program 1 times [2020-07-20 13:50:22,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:22,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876913645] [2020-07-20 13:50:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:22,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:22,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:22,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876913645] [2020-07-20 13:50:22,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:22,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:22,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50928721] [2020-07-20 13:50:22,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:22,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:22,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:22,750 INFO L87 Difference]: Start difference. First operand 874 states and 1194 transitions. Second operand 3 states. [2020-07-20 13:50:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:22,784 INFO L93 Difference]: Finished difference Result 1296 states and 1752 transitions. [2020-07-20 13:50:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:22,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 13:50:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:22,789 INFO L225 Difference]: With dead ends: 1296 [2020-07-20 13:50:22,789 INFO L226 Difference]: Without dead ends: 878 [2020-07-20 13:50:22,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-07-20 13:50:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 876. [2020-07-20 13:50:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-07-20 13:50:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1150 transitions. [2020-07-20 13:50:22,833 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1150 transitions. Word has length 21 [2020-07-20 13:50:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:22,834 INFO L479 AbstractCegarLoop]: Abstraction has 876 states and 1150 transitions. [2020-07-20 13:50:22,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1150 transitions. [2020-07-20 13:50:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:50:22,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:22,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:23,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:23,053 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 857663, now seen corresponding path program 1 times [2020-07-20 13:50:23,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:23,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235042076] [2020-07-20 13:50:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:23,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:23,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:23,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:23,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235042076] [2020-07-20 13:50:23,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:23,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:23,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471081505] [2020-07-20 13:50:23,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:23,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:23,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:23,152 INFO L87 Difference]: Start difference. First operand 876 states and 1150 transitions. Second operand 3 states. [2020-07-20 13:50:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:23,193 INFO L93 Difference]: Finished difference Result 1300 states and 1688 transitions. [2020-07-20 13:50:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:23,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 13:50:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:23,202 INFO L225 Difference]: With dead ends: 1300 [2020-07-20 13:50:23,203 INFO L226 Difference]: Without dead ends: 882 [2020-07-20 13:50:23,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-07-20 13:50:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 880. [2020-07-20 13:50:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-07-20 13:50:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1110 transitions. [2020-07-20 13:50:23,257 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1110 transitions. Word has length 21 [2020-07-20 13:50:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:23,258 INFO L479 AbstractCegarLoop]: Abstraction has 880 states and 1110 transitions. [2020-07-20 13:50:23,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1110 transitions. [2020-07-20 13:50:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:50:23,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:23,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:23,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:23,477 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash 259023101, now seen corresponding path program 1 times [2020-07-20 13:50:23,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:23,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246516329] [2020-07-20 13:50:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:23,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:23,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:23,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:23,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246516329] [2020-07-20 13:50:23,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:23,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:23,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515095641] [2020-07-20 13:50:23,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:23,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:23,555 INFO L87 Difference]: Start difference. First operand 880 states and 1110 transitions. Second operand 3 states. [2020-07-20 13:50:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:23,595 INFO L93 Difference]: Finished difference Result 1968 states and 2454 transitions. [2020-07-20 13:50:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:23,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 13:50:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:23,597 INFO L225 Difference]: With dead ends: 1968 [2020-07-20 13:50:23,597 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:50:23,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:50:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:50:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:50:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:50:23,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-07-20 13:50:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:23,606 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:50:23,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:50:23,607 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:50:23,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:23,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:50:23,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:50:23,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:50:23,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:50:23,891 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:50:23,891 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:50:23,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:50:23,891 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-07-20 13:50:23,892 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-07-20 13:50:23,892 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,892 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-07-20 13:50:23,892 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-07-20 13:50:23,892 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-20 13:50:23,892 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,893 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-07-20 13:50:23,894 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-07-20 13:50:23,894 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-07-20 13:50:23,894 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,894 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-07-20 13:50:23,894 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-07-20 13:50:23,894 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,895 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 13:50:23,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:50:23 BoogieIcfgContainer [2020-07-20 13:50:23,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:50:23,914 INFO L168 Benchmark]: Toolchain (without parser) took 6957.51 ms. Allocated memory was 137.9 MB in the beginning and 246.9 MB in the end (delta: 109.1 MB). Free memory was 101.7 MB in the beginning and 152.5 MB in the end (delta: -50.8 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,915 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.15 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,916 INFO L168 Benchmark]: Boogie Preprocessor took 146.07 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 91.2 MB in the beginning and 182.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,917 INFO L168 Benchmark]: RCFGBuilder took 440.79 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 166.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,918 INFO L168 Benchmark]: TraceAbstraction took 6002.63 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 165.7 MB in the beginning and 152.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:23,922 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.15 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.07 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 91.2 MB in the beginning and 182.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.79 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 166.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6002.63 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 165.7 MB in the beginning and 152.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 796 SDtfs, 355 SDslu, 536 SDs, 0 SdLazy, 81 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=880occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 266 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 285 NumberOfCodeBlocks, 232 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 8720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1065 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...