/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 BIGGEST_EQUIVALENCE_CLASS --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/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:32:18,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:32:18,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:32:18,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:32:18,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:32:18,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:32:18,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:32:18,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:32:18,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:32:18,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:32:18,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:32:18,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:32:18,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:32:18,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:32:18,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:32:18,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:32:18,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:32:18,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:32:18,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:32:18,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:32:18,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:32:18,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:32:18,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:32:18,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:32:18,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:32:18,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:32:18,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:32:18,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:32:18,240 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 [2020-07-21 00:32:18,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:32:18,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:32:18,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:32:18,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:32:18,257 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:32:18,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:32:18,258 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:32:18,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:32:18,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:32:18,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:32:18,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:32:18,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:32:18,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:32:18,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:32:18,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:32:18,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:32:18,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:32:18,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:32:18,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:32:18,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:32:18,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:32:18,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:18,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:32:18,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:32:18,262 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:32:18,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:32:18,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:32:18,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:32:18,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:32:18,550 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:32:18,551 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 00:32:18,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8ea938b/ea111ee7e96541d4811f58f3d3fc52e3/FLAG9fff5ff36 [2020-07-21 00:32:19,056 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:32:19,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 00:32:19,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8ea938b/ea111ee7e96541d4811f58f3d3fc52e3/FLAG9fff5ff36 [2020-07-21 00:32:19,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8ea938b/ea111ee7e96541d4811f58f3d3fc52e3 [2020-07-21 00:32:19,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:32:19,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:32:19,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:32:19,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:32:19,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:32:19,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662a784d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19, skipping insertion in model container [2020-07-21 00:32:19,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:32:19,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:32:19,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:32:19,689 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:32:19,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:32:19,719 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:32:19,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19 WrapperNode [2020-07-21 00:32:19,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:32:19,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:32:19,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:32:19,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:32:19,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (1/1) ... [2020-07-21 00:32:19,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:32:19,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:32:19,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:32:19,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:32:19,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (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 [2020-07-21 00:32:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:32:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:32:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-21 00:32:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:32:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:32:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:32:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-21 00:32:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:32:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:32:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:32:20,110 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:32:20,110 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:32:20,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:32:20 BoogieIcfgContainer [2020-07-21 00:32:20,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:32:20,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:32:20,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:32:20,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:32:20,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:32:19" (1/3) ... [2020-07-21 00:32:20,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b15a7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:32:20, skipping insertion in model container [2020-07-21 00:32:20,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:32:19" (2/3) ... [2020-07-21 00:32:20,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b15a7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:32:20, skipping insertion in model container [2020-07-21 00:32:20,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:32:20" (3/3) ... [2020-07-21 00:32:20,148 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-21 00:32:20,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:32:20,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:32:20,192 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:32:20,218 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:32:20,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:32:20,219 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:32:20,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:32:20,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:32:20,219 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:32:20,219 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:32:20,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:32:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 00:32:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 00:32:20,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:20,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:20,247 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-21 00:32:20,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:20,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410657543] [2020-07-21 00:32:20,261 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 [2020-07-21 00:32:20,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:20,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:32:20,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:20,445 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:20,450 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:20,472 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:20,474 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:20,479 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:32:20,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:20,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410657543] [2020-07-21 00:32:20,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:20,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:32:20,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84357246] [2020-07-21 00:32:20,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:32:20,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:32:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:32:20,515 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 00:32:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:20,639 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 00:32:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:32:20,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 00:32:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:20,653 INFO L225 Difference]: With dead ends: 40 [2020-07-21 00:32:20,653 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 00:32:20,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:32:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 00:32:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 00:32:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:32:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 00:32:20,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 00:32:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:20,703 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 00:32:20,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:32:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 00:32:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 00:32:20,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:20,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:20,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:20,921 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-21 00:32:20,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:20,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090066098] [2020-07-21 00:32:20,923 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 [2020-07-21 00:32:20,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:20,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 00:32:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:32:21,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:21,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090066098] [2020-07-21 00:32:21,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:21,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:32:21,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973264029] [2020-07-21 00:32:21,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:32:21,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:32:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:32:21,007 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 00:32:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:21,066 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 00:32:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:32:21,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 00:32:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:21,068 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:32:21,068 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 00:32:21,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:32:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 00:32:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 00:32:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:32:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 00:32:21,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-21 00:32:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:21,078 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 00:32:21,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:32:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 00:32:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 00:32:21,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:21,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:21,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:21,295 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-21 00:32:21,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:21,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582472196] [2020-07-21 00:32:21,296 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 [2020-07-21 00:32:21,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:21,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:21,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:32:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:21,362 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,364 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,387 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,388 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,392 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:32:21,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:21,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582472196] [2020-07-21 00:32:21,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:21,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 00:32:21,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796246044] [2020-07-21 00:32:21,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 00:32:21,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 00:32:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:32:21,401 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 00:32:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:21,546 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-21 00:32:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:32:21,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 00:32:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:21,563 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:32:21,564 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:32:21,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:32:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:32:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:32:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:32:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-21 00:32:21,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-21 00:32:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:21,580 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-21 00:32:21,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 00:32:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-21 00:32:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 00:32:21,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:21,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:21,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:21,798 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-21 00:32:21,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:21,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174639070] [2020-07-21 00:32:21,801 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 [2020-07-21 00:32:21,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:32:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:32:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:21,875 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,876 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,895 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,897 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 00:32:21,900 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 00:32:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:32:21,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:21,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174639070] [2020-07-21 00:32:21,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:21,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 00:32:21,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886545118] [2020-07-21 00:32:21,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:32:21,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:32:21,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:32:21,908 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-21 00:32:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:22,015 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:32:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:32:22,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 00:32:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:22,017 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:32:22,017 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 00:32:22,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:32:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 00:32:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 00:32:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 00:32:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 00:32:22,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-21 00:32:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:22,025 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 00:32:22,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:32:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 00:32:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 00:32:22,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:22,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:22,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:22,240 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-21 00:32:22,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:22,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397830686] [2020-07-21 00:32:22,241 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 [2020-07-21 00:32:22,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:22,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:22,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:32:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:32:22,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:22,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397830686] [2020-07-21 00:32:22,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:22,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 00:32:22,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420669189] [2020-07-21 00:32:22,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:32:22,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:32:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:32:22,314 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-21 00:32:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:22,367 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 00:32:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:32:22,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 00:32:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:22,369 INFO L225 Difference]: With dead ends: 31 [2020-07-21 00:32:22,369 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 00:32:22,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:32:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 00:32:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 00:32:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 00:32:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 00:32:22,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-21 00:32:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:22,377 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 00:32:22,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:32:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 00:32:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 00:32:22,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:22,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:22,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:22,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-21 00:32:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:22,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87046442] [2020-07-21 00:32:22,582 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 [2020-07-21 00:32:22,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 00:32:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:32:22,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:22,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87046442] [2020-07-21 00:32:22,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:22,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 00:32:22,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955659476] [2020-07-21 00:32:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 00:32:22,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 00:32:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 00:32:22,665 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-21 00:32:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:22,713 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 00:32:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:32:22,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 00:32:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:22,714 INFO L225 Difference]: With dead ends: 34 [2020-07-21 00:32:22,714 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:32:22,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:32:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:32:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:32:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:32:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 00:32:22,722 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-21 00:32:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:22,722 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 00:32:22,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 00:32:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 00:32:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 00:32:22,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:32:22,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:32:22,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:22,930 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:32:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:32:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-21 00:32:22,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:32:22,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928623083] [2020-07-21 00:32:22,933 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 [2020-07-21 00:32:22,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:32:22,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:32:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:32:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:32:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 00:32:23,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:32:23,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928623083] [2020-07-21 00:32:23,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:32:23,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 00:32:23,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682645849] [2020-07-21 00:32:23,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 00:32:23,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:32:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 00:32:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 00:32:23,022 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-21 00:32:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:32:23,098 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 00:32:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:32:23,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-21 00:32:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:32:23,099 INFO L225 Difference]: With dead ends: 30 [2020-07-21 00:32:23,100 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:32:23,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:32:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:32:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:32:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:32:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:32:23,103 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-21 00:32:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:32:23,104 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:32:23,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 00:32:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:32:23,104 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:32:23,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:32:23,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:32:23,461 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:32:23,461 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:32:23,462 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-21 00:32:23,462 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-21 00:32:23,462 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (not (= gcd_~y1 gcd_~y2)) (< 0 gcd_~y1) (<= gcd_~y1 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-21 00:32:23,462 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 00:32:23,462 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-21 00:32:23,462 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= |gcd_#in~y2| gcd_~y2) (< gcd_~y2 gcd_~y1) (< 0 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-07-21 00:32:23,463 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-21 00:32:23,463 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 00:32:23,463 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 00:32:23,463 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 00:32:23,463 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:32:23,464 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 00:32:23,464 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-21 00:32:23,465 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (< 0 main_~n~0) (< 0 main_~m~0)) [2020-07-21 00:32:23,465 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-21 00:32:23,465 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 00:32:23,465 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 00:32:23,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:32:23 BoogieIcfgContainer [2020-07-21 00:32:23,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:32:23,474 INFO L168 Benchmark]: Toolchain (without parser) took 3998.30 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.6 MB in the beginning and 98.6 MB in the end (delta: 5.0 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,475 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.85 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,477 INFO L168 Benchmark]: Boogie Preprocessor took 26.06 ms. Allocated memory is still 138.4 MB. Free memory was 93.6 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,478 INFO L168 Benchmark]: RCFGBuilder took 368.40 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 168.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,479 INFO L168 Benchmark]: TraceAbstraction took 3343.90 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 168.0 MB in the beginning and 98.6 MB in the end (delta: 69.4 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:32:23,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.85 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.06 ms. Allocated memory is still 138.4 MB. Free memory was 93.6 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.40 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 168.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3343.90 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 168.0 MB in the beginning and 98.6 MB in the end (delta: 69.4 MB). Peak memory consumption was 102.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 93 SDslu, 486 SDs, 0 SdLazy, 270 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 157 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 430 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...