/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:15,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:15,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:15,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:15,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:15,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:15,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:15,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:15,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:15,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:15,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:15,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:15,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:15,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:15,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:15,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:15,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:15,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:15,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:15,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:15,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:15,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:15,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:15,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:15,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:15,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:23:15,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:23:15,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:23:15,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:23:15,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:23:15,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:23:15,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:23:15,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:23:15,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:15,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:15,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:15,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:23:15,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:15,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:15,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:15,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:15,605 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:15,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:15,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:15,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:15,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:15,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:15,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:15,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:15,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:15,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:15,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:15,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:15,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:15,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:15,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:15,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:15,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:15,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:15,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:15,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:15,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:15,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:15,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:15,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:15,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:15,609 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:23:15,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:15,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:15,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:15,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:15,938 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:15,939 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-08-18 16:23:16,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8eeb1008/407214a6f8854c898de06e4e23cd4622/FLAG29b4fd9ae [2020-08-18 16:23:16,505 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:16,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-08-18 16:23:16,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8eeb1008/407214a6f8854c898de06e4e23cd4622/FLAG29b4fd9ae [2020-08-18 16:23:16,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8eeb1008/407214a6f8854c898de06e4e23cd4622 [2020-08-18 16:23:16,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:16,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:16,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:16,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:16,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:16,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:16" (1/1) ... [2020-08-18 16:23:16,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c4a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:16, skipping insertion in model container [2020-08-18 16:23:16,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:16" (1/1) ... [2020-08-18 16:23:16,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:16,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:17,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:17,101 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:17,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:17,148 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:17,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17 WrapperNode [2020-08-18 16:23:17,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:17,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:17,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:17,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:17,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... [2020-08-18 16:23:17,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:17,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:17,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:17,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:17,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 16:23:17,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:17,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:17,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:17,685 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:23:17,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:17 BoogieIcfgContainer [2020-08-18 16:23:17,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:17,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:17,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:17,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:17,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:16" (1/3) ... [2020-08-18 16:23:17,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76525f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:17, skipping insertion in model container [2020-08-18 16:23:17,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:17" (2/3) ... [2020-08-18 16:23:17,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76525f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:17, skipping insertion in model container [2020-08-18 16:23:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:17" (3/3) ... [2020-08-18 16:23:17,698 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-08-18 16:23:17,706 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:17,711 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:17,724 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:17,748 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:17,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:17,749 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:17,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:17,749 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:17,749 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:17,749 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:17,750 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-08-18 16:23:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:23:17,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:17,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:17,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -978746934, now seen corresponding path program 1 times [2020-08-18 16:23:17,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:17,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205737496] [2020-08-18 16:23:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 16:23:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:18,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205737496] [2020-08-18 16:23:18,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:18,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:23:18,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267872901] [2020-08-18 16:23:18,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:23:18,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:23:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:23:18,081 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-08-18 16:23:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:18,290 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-08-18 16:23:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:23:18,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 16:23:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:18,301 INFO L225 Difference]: With dead ends: 67 [2020-08-18 16:23:18,302 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 16:23:18,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:23:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 16:23:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 16:23:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 16:23:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 16:23:18,343 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-08-18 16:23:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:18,344 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 16:23:18,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:23:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 16:23:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:23:18,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:18,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:18,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:18,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1791807978, now seen corresponding path program 1 times [2020-08-18 16:23:18,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:18,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801000386] [2020-08-18 16:23:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 16:23:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:18,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801000386] [2020-08-18 16:23:18,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:23:18,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 16:23:18,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622889247] [2020-08-18 16:23:18,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:23:18,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:23:18,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:18,472 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-08-18 16:23:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:18,614 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-18 16:23:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:23:18,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-18 16:23:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:18,616 INFO L225 Difference]: With dead ends: 58 [2020-08-18 16:23:18,617 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 16:23:18,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 16:23:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-18 16:23:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 16:23:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-18 16:23:18,627 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-08-18 16:23:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:18,627 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-18 16:23:18,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:23:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-18 16:23:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:23:18,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:18,629 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, 1, 1, 1] [2020-08-18 16:23:18,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:18,630 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2002160904, now seen corresponding path program 2 times [2020-08-18 16:23:18,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:18,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050446905] [2020-08-18 16:23:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 16:23:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 16:23:18,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050446905] [2020-08-18 16:23:18,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:18,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:23:18,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590010990] [2020-08-18 16:23:18,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:23:18,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:23:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:23:18,901 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-08-18 16:23:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:19,092 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-08-18 16:23:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:23:19,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-18 16:23:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:19,095 INFO L225 Difference]: With dead ends: 51 [2020-08-18 16:23:19,095 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 16:23:19,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:23:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 16:23:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-08-18 16:23:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 16:23:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-18 16:23:19,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-08-18 16:23:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:19,121 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-18 16:23:19,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:23:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-18 16:23:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:23:19,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:19,126 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:19,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:23:19,126 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash -709829620, now seen corresponding path program 1 times [2020-08-18 16:23:19,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:19,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094005302] [2020-08-18 16:23:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:19,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:19,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 16:23:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 16:23:19,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094005302] [2020-08-18 16:23:19,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:23:19,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:23:19,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493971582] [2020-08-18 16:23:19,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:23:19,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:23:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:23:19,493 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-08-18 16:23:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:19,790 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-18 16:23:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:23:19,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-18 16:23:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:19,794 INFO L225 Difference]: With dead ends: 67 [2020-08-18 16:23:19,795 INFO L226 Difference]: Without dead ends: 65 [2020-08-18 16:23:19,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-18 16:23:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-18 16:23:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2020-08-18 16:23:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 16:23:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-08-18 16:23:19,826 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-08-18 16:23:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:19,827 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-08-18 16:23:19,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:23:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-08-18 16:23:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:23:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:19,832 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:19,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:23:19,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -8765042, now seen corresponding path program 1 times [2020-08-18 16:23:19,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:19,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934057821] [2020-08-18 16:23:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:23:19,906 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:23:19,907 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:19,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:23:19,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:19 BoogieIcfgContainer [2020-08-18 16:23:19,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:19,940 INFO L168 Benchmark]: Toolchain (without parser) took 3059.80 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 101.6 MB in the beginning and 100.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 96.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,941 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.99 ms. Allocated memory is still 140.0 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,944 INFO L168 Benchmark]: Boogie Preprocessor took 121.47 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,949 INFO L168 Benchmark]: RCFGBuilder took 418.57 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 161.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,951 INFO L168 Benchmark]: TraceAbstraction took 2245.54 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 161.1 MB in the beginning and 100.5 MB in the end (delta: 60.6 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:19,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.99 ms. Allocated memory is still 140.0 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.47 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 418.57 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 161.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2245.54 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 161.1 MB in the beginning and 100.5 MB in the end (delta: 60.6 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND FALSE !(i < SIZE) [L27] COND FALSE !(SIZE % 2 != 0) [L29] CALL assume_abort_if_not(SIZE % 2 == 0) [L4] COND FALSE !(!cond) [L29] RET assume_abort_if_not(SIZE % 2 == 0) [L30] i = 1 [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] [L36] COND TRUE a[2*i-1] > i [L38] a[2*i-1] = 2*i-1 [L30] i++ [L30] COND FALSE !(i <= SIZE/2) [L42] i = 0 [L42] COND TRUE i < SIZE [L44] EXPR a[i] [L44] CALL __VERIFIER_assert( a[i] <= i ) [L6] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 156 SDslu, 112 SDs, 0 SdLazy, 410 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=4, 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, 4 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 11359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/10 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...