/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 15:45:19,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:19,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:19,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:19,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:19,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:19,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:19,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:19,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:19,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:19,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:19,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:19,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:19,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:19,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:19,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:19,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:19,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:19,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:19,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:19,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:19,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:19,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:19,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:19,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:19,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:19,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:19,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:19,892 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 15:45:19,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:19,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:19,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:19,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:19,908 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:19,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:19,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:19,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:19,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:19,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:19,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:19,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:19,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:19,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:19,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:19,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:19,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:19,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:19,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:19,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:19,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:19,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:19,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:19,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:19,913 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_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:20,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:20,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:20,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:20,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:20,226 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:20,227 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 15:45:20,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b160b539f/c813ca27be2c47039aaf1299e244a575/FLAG048348d66 [2020-07-21 15:45:20,779 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:20,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-21 15:45:20,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b160b539f/c813ca27be2c47039aaf1299e244a575/FLAG048348d66 [2020-07-21 15:45:21,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b160b539f/c813ca27be2c47039aaf1299e244a575 [2020-07-21 15:45:21,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:21,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:21,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:21,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:21,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:21,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d76e0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21, skipping insertion in model container [2020-07-21 15:45:21,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:21,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:21,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:21,386 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:21,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:21,418 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:21,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21 WrapperNode [2020-07-21 15:45:21,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:21,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:21,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:21,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:21,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (1/1) ... [2020-07-21 15:45:21,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:21,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:21,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:21,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:21,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (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 15:45:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-21 15:45:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:21,798 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:21,799 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:21,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:21 BoogieIcfgContainer [2020-07-21 15:45:21,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:21,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:21,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:21,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:21,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:21" (1/3) ... [2020-07-21 15:45:21,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e47dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:21, skipping insertion in model container [2020-07-21 15:45:21,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:21" (2/3) ... [2020-07-21 15:45:21,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e47dbf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:21, skipping insertion in model container [2020-07-21 15:45:21,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:21" (3/3) ... [2020-07-21 15:45:21,824 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-21 15:45:21,837 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:21,845 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:21,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:21,900 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:21,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:21,901 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:21,901 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:21,901 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:21,901 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:21,901 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:21,902 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 15:45:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:21,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:21,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:21,930 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-21 15:45:21,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:21,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131872970] [2020-07-21 15:45:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:22,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:22,100 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:22,105 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:22,131 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:22,140 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:22,143 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:22,162 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 15:45:22,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:22,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131872970] [2020-07-21 15:45:22,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:22,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:22,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074298233] [2020-07-21 15:45:22,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:22,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:22,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:22,188 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-21 15:45:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:22,336 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 15:45:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:22,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 15:45:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:22,349 INFO L225 Difference]: With dead ends: 40 [2020-07-21 15:45:22,349 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 15:45:22,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 15:45:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 15:45:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 15:45:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 15:45:22,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-21 15:45:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:22,401 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 15:45:22,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 15:45:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 15:45:22,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:22,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:22,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:22,619 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-21 15:45:22,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:22,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613052690] [2020-07-21 15:45:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:22,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:22,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:45:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:22,727 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 15:45:22,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:22,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613052690] [2020-07-21 15:45:22,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:22,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:22,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471503703] [2020-07-21 15:45:22,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:22,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:22,738 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 15:45:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:22,805 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 15:45:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:22,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 15:45:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:22,808 INFO L225 Difference]: With dead ends: 30 [2020-07-21 15:45:22,808 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 15:45:22,810 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 15:45:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 15:45:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 15:45:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 15:45:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-21 15:45:22,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-21 15:45:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:22,826 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-21 15:45:22,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-21 15:45:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 15:45:22,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:22,830 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 15:45:23,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:23,046 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-21 15:45:23,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:23,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707804463] [2020-07-21 15:45:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:23,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:23,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:23,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,122 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,140 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,143 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,146 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,156 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 15:45:23,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:23,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707804463] [2020-07-21 15:45:23,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:23,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:45:23,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784044295] [2020-07-21 15:45:23,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:45:23,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:45:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:23,159 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-21 15:45:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:23,296 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-21 15:45:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:23,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 15:45:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:23,312 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:45:23,312 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:45:23,313 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 15:45:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:45:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 15:45:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:45:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-21 15:45:23,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-21 15:45:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:23,323 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-21 15:45:23,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:45:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-21 15:45:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 15:45:23,324 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:23,324 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 15:45:23,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:23,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-21 15:45:23,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:23,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904312206] [2020-07-21 15:45:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:23,577 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:23,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:23,614 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,616 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:45:23,633 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 15:45:23,637 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 15:45:23,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:23,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904312206] [2020-07-21 15:45:23,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:23,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 15:45:23,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816849809] [2020-07-21 15:45:23,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 15:45:23,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 15:45:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:23,640 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-21 15:45:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:23,746 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 15:45:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:23,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-21 15:45:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:23,748 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:45:23,748 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 15:45:23,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 15:45:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 15:45:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 15:45:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 15:45:23,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-21 15:45:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:23,758 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 15:45:23,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 15:45:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 15:45:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 15:45:23,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:23,760 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 15:45:23,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:23,961 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-21 15:45:23,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:23,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047110257] [2020-07-21 15:45:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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) [2020-07-21 15:45:23,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:24,056 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 15:45:24,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:24,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047110257] [2020-07-21 15:45:24,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:24,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 15:45:24,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56400343] [2020-07-21 15:45:24,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 15:45:24,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:24,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 15:45:24,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:24,060 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-21 15:45:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:24,114 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 15:45:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:24,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 15:45:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:24,117 INFO L225 Difference]: With dead ends: 31 [2020-07-21 15:45:24,117 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 15:45:24,118 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 15:45:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 15:45:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 15:45:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 15:45:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 15:45:24,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-21 15:45:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:24,132 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 15:45:24,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 15:45:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 15:45:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 15:45:24,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:24,135 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 15:45:24,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:24,349 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-21 15:45:24,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:24,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156388229] [2020-07-21 15:45:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:24,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:24,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:24,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:24,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:24,429 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 15:45:24,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:24,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156388229] [2020-07-21 15:45:24,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:24,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 15:45:24,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726657063] [2020-07-21 15:45:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 15:45:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 15:45:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:45:24,432 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-21 15:45:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:24,475 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 15:45:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:45:24,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-21 15:45:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:24,477 INFO L225 Difference]: With dead ends: 34 [2020-07-21 15:45:24,477 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 15:45:24,478 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 15:45:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 15:45:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 15:45:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 15:45:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-21 15:45:24,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-21 15:45:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:24,486 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-21 15:45:24,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 15:45:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-21 15:45:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 15:45:24,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:24,488 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 15:45:24,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:24,694 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-21 15:45:24,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:24,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209805660] [2020-07-21 15:45:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:24,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:24,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:24,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:45:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:24,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:25,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209805660] [2020-07-21 15:45:25,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:25,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-21 15:45:25,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811801131] [2020-07-21 15:45:25,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:45:25,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:45:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:45:25,269 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 12 states. [2020-07-21 15:45:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:25,443 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 15:45:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:45:25,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-21 15:45:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:25,445 INFO L225 Difference]: With dead ends: 30 [2020-07-21 15:45:25,445 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:45:25,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:45:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:45:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:45:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:45:25,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-21 15:45:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:25,447 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:45:25,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:45:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:45:25,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:45:25,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:25,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:45:25,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:45:25,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:25,773 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-21 15:45:25,773 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-21 15:45:25,773 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 15:45:25,773 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 15:45:25,774 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-21 15:45:25,774 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 15:45:25,774 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-21 15:45:25,774 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 15:45:25,774 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-21 15:45:25,774 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 15:45:25,774 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:45:25,775 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:45:25,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:45:25,775 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:45:25,775 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 15:45:25,775 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-21 15:45:25,775 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-21 15:45:25,776 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-21 15:45:25,776 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 15:45:25,776 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-21 15:45:25,776 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (< 0 main_~m~0) [2020-07-21 15:45:25,778 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-21 15:45:25,779 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 15:45:25,779 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 15:45:25,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:45:25 BoogieIcfgContainer [2020-07-21 15:45:25,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:45:25,792 INFO L168 Benchmark]: Toolchain (without parser) took 4615.66 ms. Allocated memory was 137.9 MB in the beginning and 248.5 MB in the end (delta: 110.6 MB). Free memory was 102.0 MB in the beginning and 163.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,794 INFO L168 Benchmark]: CDTParser took 0.49 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.56 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,802 INFO L168 Benchmark]: Boogie Preprocessor took 28.58 ms. Allocated memory is still 137.9 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,803 INFO L168 Benchmark]: RCFGBuilder took 355.71 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 167.3 MB in the end (delta: -76.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,803 INFO L168 Benchmark]: TraceAbstraction took 3972.89 ms. Allocated memory was 200.8 MB in the beginning and 248.5 MB in the end (delta: 47.7 MB). Free memory was 166.6 MB in the beginning and 163.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-07-21 15:45:25,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.56 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 92.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.58 ms. Allocated memory is still 137.9 MB. Free memory was 92.0 MB in the beginning and 90.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.71 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 167.3 MB in the end (delta: -76.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3972.89 ms. Allocated memory was 200.8 MB in the beginning and 248.5 MB in the end (delta: 47.7 MB). Free memory was 166.6 MB in the beginning and 163.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 50.5 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: 3.7s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 99 SDslu, 501 SDs, 0 SdLazy, 352 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s 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, 38 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 157 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 9405 SizeOfPredicates, 24 NumberOfNonLiveVariables, 402 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 44/50 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...