/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:58,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:58,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:58,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:58,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:58,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:58,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:58,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:58,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:58,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:58,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:58,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:58,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:58,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:58,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:58,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:58,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:58,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:58,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:58,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:58,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:58,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:58,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:58,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:58,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:21:58,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:21:58,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:21:58,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:21:58,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:21:58,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:21:58,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:21:58,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:21:58,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:21:58,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:21:58,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:21:58,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:21:58,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:21:58,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:21:58,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:58,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:58,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:58,731 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 11:21:58,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:58,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:58,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:58,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:58,759 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:58,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:58,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:58,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:58,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:58,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:58,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:58,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:58,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:58,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:58,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:58,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:58,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:58,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:58,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:58,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:58,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:58,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:58,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:58,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:58,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:58,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:58,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:58,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:58,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:58,765 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 [2020-07-21 11:21:59,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:59,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:59,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:59,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:59,052 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:59,052 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 11:21:59,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9fcb740/7744d97e4be1412899951df3adcbbad6/FLAG937698b49 [2020-07-21 11:21:59,599 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:59,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-21 11:21:59,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9fcb740/7744d97e4be1412899951df3adcbbad6/FLAG937698b49 [2020-07-21 11:21:59,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9fcb740/7744d97e4be1412899951df3adcbbad6 [2020-07-21 11:21:59,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:59,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:59,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:59,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:59,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:59,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:59" (1/1) ... [2020-07-21 11:21:59,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25060991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:59, skipping insertion in model container [2020-07-21 11:21:59,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:59" (1/1) ... [2020-07-21 11:21:59,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:59,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:22:00,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:00,197 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:22:00,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:00,236 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:22:00,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00 WrapperNode [2020-07-21 11:22:00,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:22:00,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:22:00,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:22:00,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:22:00,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (1/1) ... [2020-07-21 11:22:00,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:22:00,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:22:00,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:22:00,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:22:00,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (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 11:22:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:22:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:22:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 11:22:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:22:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:22:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:22:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:22:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:22:00,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:22:00,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:22:00,696 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:22:00,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:00 BoogieIcfgContainer [2020-07-21 11:22:00,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:22:00,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:22:00,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:22:00,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:22:00,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:59" (1/3) ... [2020-07-21 11:22:00,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de0e681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:00, skipping insertion in model container [2020-07-21 11:22:00,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:00" (2/3) ... [2020-07-21 11:22:00,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de0e681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:00, skipping insertion in model container [2020-07-21 11:22:00,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:00" (3/3) ... [2020-07-21 11:22:00,712 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-21 11:22:00,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:22:00,732 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:22:00,748 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:22:00,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:22:00,776 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:22:00,776 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:22:00,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:22:00,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:22:00,777 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:22:00,777 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:22:00,777 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:22:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 11:22:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:22:00,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:00,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:00,805 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-21 11:22:00,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:00,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221342505] [2020-07-21 11:22:00,822 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 [2020-07-21 11:22:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:22:00,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:00,932 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 11:22:00,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:22:00,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221342505] [2020-07-21 11:22:00,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:22:00,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:22:00,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049736032] [2020-07-21 11:22:00,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:22:00,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:22:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:22:00,953 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 11:22:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:00,972 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 11:22:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:22:00,973 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-21 11:22:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:00,981 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:22:00,981 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 11:22:00,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:22:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 11:22:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 11:22:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 11:22:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 11:22:01,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-21 11:22:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:01,025 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 11:22:01,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:22:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 11:22:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:22:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:01,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:01,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:01,242 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-21 11:22:01,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:01,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944992188] [2020-07-21 11:22:01,244 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 [2020-07-21 11:22:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:22:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:01,346 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 11:22:01,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:22:01,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944992188] [2020-07-21 11:22:01,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:22:01,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:22:01,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671808526] [2020-07-21 11:22:01,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:22:01,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:01,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:22:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:22:01,351 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 11:22:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:01,375 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-21 11:22:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:22:01,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:22:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:01,377 INFO L225 Difference]: With dead ends: 34 [2020-07-21 11:22:01,377 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 11:22:01,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:22:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 11:22:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-21 11:22:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 11:22:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 11:22:01,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-21 11:22:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 11:22:01,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:22:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 11:22:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:22:01,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:01,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:01,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:01,602 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-21 11:22:01,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:01,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042262319] [2020-07-21 11:22:01,605 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 [2020-07-21 11:22:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:22:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:01,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:22:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:01,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042262319] [2020-07-21 11:22:01,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:22:01,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 11:22:01,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204086472] [2020-07-21 11:22:01,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:22:01,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:22:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:22:01,776 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-21 11:22:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:01,814 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-07-21 11:22:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:22:01,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 11:22:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:01,816 INFO L225 Difference]: With dead ends: 39 [2020-07-21 11:22:01,817 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 11:22:01,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:22:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 11:22:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 11:22:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 11:22:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-21 11:22:01,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-07-21 11:22:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:01,824 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-21 11:22:01,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:22:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-21 11:22:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:22:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:01,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:02,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:02,040 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 2 times [2020-07-21 11:22:02,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:02,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378945669] [2020-07-21 11:22:02,042 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 [2020-07-21 11:22:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:22:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:22:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:02,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378945669] [2020-07-21 11:22:02,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:22:02,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:22:02,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955838715] [2020-07-21 11:22:02,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:22:02,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:22:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:22:02,288 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-07-21 11:22:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:02,395 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-07-21 11:22:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:22:02,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-07-21 11:22:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:02,397 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:22:02,399 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:22:02,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:22:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:22:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 11:22:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:22:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-21 11:22:02,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 26 [2020-07-21 11:22:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:02,416 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-21 11:22:02,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:22:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-21 11:22:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:22:02,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:02,418 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:02,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:02,634 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:02,635 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 3 times [2020-07-21 11:22:02,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:02,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128790276] [2020-07-21 11:22:02,637 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 [2020-07-21 11:22:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:22:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:02,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:22:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:03,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128790276] [2020-07-21 11:22:03,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:22:03,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 11:22:03,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734030833] [2020-07-21 11:22:03,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 11:22:03,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 11:22:03,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:22:03,064 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-07-21 11:22:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:03,169 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-07-21 11:22:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 11:22:03,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-07-21 11:22:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:03,171 INFO L225 Difference]: With dead ends: 71 [2020-07-21 11:22:03,172 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 11:22:03,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:22:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 11:22:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 11:22:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 11:22:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-21 11:22:03,182 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 38 [2020-07-21 11:22:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:03,183 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-21 11:22:03,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 11:22:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-21 11:22:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 11:22:03,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:03,185 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:03,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:03,392 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 4 times [2020-07-21 11:22:03,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:03,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838483477] [2020-07-21 11:22:03,395 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 [2020-07-21 11:22:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:22:07,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:22:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:22:23,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:22:23,619 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:22:23,619 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:22:23,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:23,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:22:23 BoogieIcfgContainer [2020-07-21 11:22:23,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:22:23,878 INFO L168 Benchmark]: Toolchain (without parser) took 23915.81 ms. Allocated memory was 139.5 MB in the beginning and 244.8 MB in the end (delta: 105.4 MB). Free memory was 104.1 MB in the beginning and 218.8 MB in the end (delta: -114.7 MB). Peak memory consumption was 115.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,879 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.95 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,881 INFO L168 Benchmark]: Boogie Preprocessor took 143.10 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,882 INFO L168 Benchmark]: RCFGBuilder took 320.70 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 165.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,883 INFO L168 Benchmark]: TraceAbstraction took 23173.11 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 165.0 MB in the beginning and 218.8 MB in the end (delta: -53.8 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:23,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.95 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.10 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 180.8 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.70 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 165.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23173.11 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 165.0 MB in the beginning and 218.8 MB in the end (delta: -53.8 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=1, ad1={2:0}, ad2={2:0}, i=11, j=20, pa={2:8}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=11, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=11, j=20, pa={2:8}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=11, j=20, pa={2:8}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.0s, OverallIterations: 6, TraceHistogramMax: 20, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 35 SDslu, 153 SDs, 0 SdLazy, 84 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=5, 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, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 9525 SizeOfPredicates, 4 NumberOfNonLiveVariables, 533 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/234 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...