/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 NOT_INCREMENTALLY -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 [2020-07-20 10:48:02,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:48:02,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:48:02,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:48:02,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:48:02,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:48:02,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:48:02,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:48:02,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:48:02,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:48:02,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:48:02,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:48:02,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:48:02,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:48:02,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:48:02,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:48:02,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:48:02,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:48:02,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:48:02,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:48:02,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:48:02,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:48:02,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:48:02,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:48:02,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 10:48:02,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 10:48:02,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 10:48:02,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 10:48:02,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 10:48:02,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 10:48:02,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:48:02,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:48:02,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:48:02,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:48:02,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:48:02,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:48:02,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:48:02,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:48:02,931 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:48:02,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:48:02,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:48:02,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:48:02,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:48:02,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:48:02,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:48:02,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:48:02,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:48:02,934 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:48:02,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:48:02,934 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:48:02,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:48:02,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:48:02,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:48:02,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:48:02,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:48:02,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:48:02,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:48:02,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:48:02,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:48:02,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:48:02,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:02,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:48:02,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:48:02,937 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 -> NOT_INCREMENTALLY [2020-07-20 10:48:03,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:48:03,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:48:03,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:48:03,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:48:03,270 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:48:03,270 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-20 10:48:03,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f/FLAG62fc1863f [2020-07-20 10:48:03,805 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:48:03,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-20 10:48:03,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f/FLAG62fc1863f [2020-07-20 10:48:04,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f [2020-07-20 10:48:04,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:48:04,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:48:04,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:48:04,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:48:04,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:48:04,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04, skipping insertion in model container [2020-07-20 10:48:04,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:48:04,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:48:04,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:48:04,416 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:48:04,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:48:04,445 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:48:04,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04 WrapperNode [2020-07-20 10:48:04,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:48:04,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:48:04,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:48:04,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:48:04,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... [2020-07-20 10:48:04,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:48:04,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:48:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:48:04,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:48:04,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:48:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:48:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:48:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-20 10:48:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:48:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:48:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:48:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-20 10:48:04,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:48:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:48:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:48:04,839 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:48:04,840 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:48:04,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:04 BoogieIcfgContainer [2020-07-20 10:48:04,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:48:04,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:48:04,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:48:04,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:48:04,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:48:04" (1/3) ... [2020-07-20 10:48:04,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc8ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:04, skipping insertion in model container [2020-07-20 10:48:04,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (2/3) ... [2020-07-20 10:48:04,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc8ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:04, skipping insertion in model container [2020-07-20 10:48:04,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:04" (3/3) ... [2020-07-20 10:48:04,857 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-20 10:48:04,868 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:48:04,875 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:48:04,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:48:04,915 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:48:04,915 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:48:04,916 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:48:04,916 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:48:04,916 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:48:04,916 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:48:04,916 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:48:04,916 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:48:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-20 10:48:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 10:48:04,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:04,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:04,945 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-20 10:48:04,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:04,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148328175] [2020-07-20 10:48:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:48:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:05,160 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:05,165 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:05,186 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:05,188 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:05,193 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:48:05,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:05,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148328175] [2020-07-20 10:48:05,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:05,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:48:05,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41794861] [2020-07-20 10:48:05,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:48:05,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:48:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:48:05,232 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-20 10:48:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:05,383 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 10:48:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:48:05,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 10:48:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:05,396 INFO L225 Difference]: With dead ends: 40 [2020-07-20 10:48:05,397 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 10:48:05,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:48:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 10:48:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 10:48:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 10:48:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 10:48:05,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-20 10:48:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:05,451 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 10:48:05,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:48:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 10:48:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 10:48:05,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:05,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:05,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:05,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-20 10:48:05,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:05,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727881419] [2020-07-20 10:48:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:48:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:48:05,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:05,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727881419] [2020-07-20 10:48:05,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:05,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:48:05,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898539064] [2020-07-20 10:48:05,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:48:05,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:48:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:48:05,759 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-20 10:48:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:05,807 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 10:48:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:48:05,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 10:48:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:05,809 INFO L225 Difference]: With dead ends: 30 [2020-07-20 10:48:05,810 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 10:48:05,811 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 [2020-07-20 10:48:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 10:48:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 10:48:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 10:48:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-20 10:48:05,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-20 10:48:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:05,820 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-20 10:48:05,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:48:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-20 10:48:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:48:05,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:05,822 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] [2020-07-20 10:48:06,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,035 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-20 10:48:06,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:06,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797025100] [2020-07-20 10:48:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:48:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:06,105 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,107 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,123 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,125 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,129 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:48:06,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:06,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797025100] [2020-07-20 10:48:06,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:06,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:48:06,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100693334] [2020-07-20 10:48:06,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:48:06,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:48:06,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:48:06,138 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-20 10:48:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:06,259 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-20 10:48:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:48:06,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 10:48:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:06,272 INFO L225 Difference]: With dead ends: 36 [2020-07-20 10:48:06,272 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:48:06,273 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 [2020-07-20 10:48:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:48:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 10:48:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 10:48:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-20 10:48:06,282 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-20 10:48:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:06,283 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-20 10:48:06,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:48:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-20 10:48:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:48:06,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:06,284 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] [2020-07-20 10:48:06,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,498 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-20 10:48:06,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:06,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810649207] [2020-07-20 10:48:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:48:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:06,593 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,594 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,611 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:48:06,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 10:48:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:48:06,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:06,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810649207] [2020-07-20 10:48:06,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:06,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:48:06,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144009030] [2020-07-20 10:48:06,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:48:06,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:48:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:48:06,623 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-20 10:48:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:06,730 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 10:48:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:48:06,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-20 10:48:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:06,732 INFO L225 Difference]: With dead ends: 36 [2020-07-20 10:48:06,732 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 10:48:06,733 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 [2020-07-20 10:48:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 10:48:06,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-20 10:48:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 10:48:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 10:48:06,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-20 10:48:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:06,740 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 10:48:06,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:48:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 10:48:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 10:48:06,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:06,743 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] [2020-07-20 10:48:06,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,944 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-20 10:48:06,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:06,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272336593] [2020-07-20 10:48:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:48:06,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:48:07,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:07,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272336593] [2020-07-20 10:48:07,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:07,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:48:07,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323069161] [2020-07-20 10:48:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:48:07,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:48:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:48:07,039 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-20 10:48:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:07,103 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-20 10:48:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:48:07,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 10:48:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:07,105 INFO L225 Difference]: With dead ends: 31 [2020-07-20 10:48:07,105 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 10:48:07,106 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 [2020-07-20 10:48:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 10:48:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-20 10:48:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 10:48:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 10:48:07,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-20 10:48:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:07,113 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 10:48:07,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:48:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 10:48:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 10:48:07,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:07,115 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] [2020-07-20 10:48:07,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:07,329 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-20 10:48:07,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:07,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545405783] [2020-07-20 10:48:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:48:07,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:48:07,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:07,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545405783] [2020-07-20 10:48:07,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:07,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:48:07,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066955997] [2020-07-20 10:48:07,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:48:07,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:48:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:48:07,415 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-20 10:48:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:07,479 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-20 10:48:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:48:07,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 10:48:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:07,481 INFO L225 Difference]: With dead ends: 34 [2020-07-20 10:48:07,481 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 10:48:07,483 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 [2020-07-20 10:48:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 10:48:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 10:48:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 10:48:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-20 10:48:07,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-20 10:48:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:07,497 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-20 10:48:07,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:48:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-20 10:48:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 10:48:07,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:07,501 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] [2020-07-20 10:48:07,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:07,702 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-20 10:48:07,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:07,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906671876] [2020-07-20 10:48:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:07,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:48:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 10:48:07,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:07,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906671876] [2020-07-20 10:48:07,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:07,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 10:48:07,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805538] [2020-07-20 10:48:07,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:48:07,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:07,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:48:07,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:48:07,799 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-20 10:48:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:07,876 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 10:48:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:48:07,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-20 10:48:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:07,877 INFO L225 Difference]: With dead ends: 30 [2020-07-20 10:48:07,877 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:48:07,880 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 [2020-07-20 10:48:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:48:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:48:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:48:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:48:07,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-20 10:48:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:07,882 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:48:07,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:48:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:48:07,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:48:08,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:08,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:48:08,236 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:48:08,236 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:48:08,237 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-20 10:48:08,237 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-20 10:48:08,237 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)) [2020-07-20 10:48:08,237 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-20 10:48:08,237 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-20 10:48:08,238 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)) [2020-07-20 10:48:08,238 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-20 10:48:08,238 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 10:48:08,238 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 10:48:08,238 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 10:48:08,238 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:48:08,239 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:48:08,239 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:48:08,239 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:48:08,239 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 10:48:08,239 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-20 10:48:08,240 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-20 10:48:08,240 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-20 10:48:08,240 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 10:48:08,240 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-20 10:48:08,240 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (< 0 main_~n~0) (< 0 main_~m~0)) [2020-07-20 10:48:08,241 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-20 10:48:08,241 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 10:48:08,241 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-20 10:48:08,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:48:08 BoogieIcfgContainer [2020-07-20 10:48:08,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:48:08,250 INFO L168 Benchmark]: Toolchain (without parser) took 4046.07 ms. Allocated memory was 145.2 MB in the beginning and 233.3 MB in the end (delta: 88.1 MB). Free memory was 103.1 MB in the beginning and 98.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 92.7 MB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,251 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.55 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,253 INFO L168 Benchmark]: Boogie Preprocessor took 28.01 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,254 INFO L168 Benchmark]: RCFGBuilder took 372.35 ms. Allocated memory was 145.2 MB in the beginning and 200.3 MB in the end (delta: 55.1 MB). Free memory was 91.9 MB in the beginning and 166.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,255 INFO L168 Benchmark]: TraceAbstraction took 3399.72 ms. Allocated memory was 200.3 MB in the beginning and 233.3 MB in the end (delta: 33.0 MB). Free memory was 165.5 MB in the beginning and 98.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 100.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:48:08,259 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.55 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.01 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.35 ms. Allocated memory was 145.2 MB in the beginning and 200.3 MB in the end (delta: 55.1 MB). Free memory was 91.9 MB in the beginning and 166.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3399.72 ms. Allocated memory was 200.3 MB in the beginning and 233.3 MB in the end (delta: 33.0 MB). Free memory was 165.5 MB in the beginning and 98.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 100.0 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: 3.1s, 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, 0.5s 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, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 460 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...