/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/loops/matrix-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:39:28,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:39:28,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:39:28,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:39:28,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:39:28,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:39:28,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:39:28,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:39:28,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:39:28,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:39:28,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:39:28,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:39:28,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:39:28,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:39:28,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:39:28,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:39:28,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:39:28,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:39:28,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:39:28,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:39:28,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:39:28,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:39:28,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:39:28,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:39:28,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:39:28,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:39:28,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:39:28,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:39:28,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:39:28,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 11:39:28,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:39:28,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:39:28,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:39:28,728 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 11:39:28,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:39:28,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:39:28,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:39:28,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:39:28,747 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:39:28,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:39:28,747 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:39:28,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:39:28,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:39:28,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:39:28,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:39:28,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:39:28,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:39:28,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:39:28,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:39:28,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:39:28,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:39:28,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:39:28,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:39:28,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:39:28,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:39:28,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:39:28,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:39:28,752 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 11:39:29,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:39:29,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:39:29,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:39:29,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:39:29,114 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:39:29,115 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-2.c [2020-07-21 11:39:29,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6863eee6d/5acfb3643062454caae55d0b8e9c39a3/FLAG63519820e [2020-07-21 11:39:29,724 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:39:29,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-2.c [2020-07-21 11:39:29,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6863eee6d/5acfb3643062454caae55d0b8e9c39a3/FLAG63519820e [2020-07-21 11:39:30,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6863eee6d/5acfb3643062454caae55d0b8e9c39a3 [2020-07-21 11:39:30,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:39:30,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:39:30,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:30,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:39:30,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:39:30,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef8221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30, skipping insertion in model container [2020-07-21 11:39:30,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:39:30,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:39:30,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:30,384 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:39:30,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:30,429 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:39:30,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30 WrapperNode [2020-07-21 11:39:30,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:30,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:39:30,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:39:30,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:39:30,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (1/1) ... [2020-07-21 11:39:30,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:39:30,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:39:30,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:39:30,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:39:30,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (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 11:39:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:39:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:39:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:39:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:39:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:39:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:39:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 11:39:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:39:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:39:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:39:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:39:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:39:30,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:39:30,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:39:30,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:39:31,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:39:31,003 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 11:39:31,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:31 BoogieIcfgContainer [2020-07-21 11:39:31,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:39:31,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:39:31,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:39:31,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:39:31,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:39:30" (1/3) ... [2020-07-21 11:39:31,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d365d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:31, skipping insertion in model container [2020-07-21 11:39:31,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:30" (2/3) ... [2020-07-21 11:39:31,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d365d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:31, skipping insertion in model container [2020-07-21 11:39:31,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:31" (3/3) ... [2020-07-21 11:39:31,020 INFO L109 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2020-07-21 11:39:31,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:39:31,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:39:31,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:39:31,111 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:39:31,112 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:39:31,112 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:39:31,112 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:39:31,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:39:31,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:39:31,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:39:31,115 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:39:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 11:39:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:39:31,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:31,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:31,162 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2125374060, now seen corresponding path program 1 times [2020-07-21 11:39:31,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:31,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852444130] [2020-07-21 11:39:31,199 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 11:39:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:39:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:31,354 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 11:39:31,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:31,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852444130] [2020-07-21 11:39:31,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:31,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:39:31,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414021926] [2020-07-21 11:39:31,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:39:31,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:39:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:31,385 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-07-21 11:39:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:31,419 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2020-07-21 11:39:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:39:31,421 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 11:39:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:31,440 INFO L225 Difference]: With dead ends: 52 [2020-07-21 11:39:31,440 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 11:39:31,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 11:39:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 11:39:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 11:39:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 11:39:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 11:39:31,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-07-21 11:39:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:31,490 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 11:39:31,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:39:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 11:39:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:39:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:31,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:31,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:31,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 739661195, now seen corresponding path program 1 times [2020-07-21 11:39:31,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:31,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932009663] [2020-07-21 11:39:31,710 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 11:39:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:39:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:31,848 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 11:39:31,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:31,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932009663] [2020-07-21 11:39:31,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:31,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:31,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079311747] [2020-07-21 11:39:31,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:31,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:31,854 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-07-21 11:39:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:31,971 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-07-21 11:39:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:31,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 11:39:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:31,976 INFO L225 Difference]: With dead ends: 49 [2020-07-21 11:39:31,976 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:39:31,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:39:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:39:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-07-21 11:39:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 11:39:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 11:39:31,991 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-07-21 11:39:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:31,991 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 11:39:31,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 11:39:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:39:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:31,993 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 11:39:32,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:32,208 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1656958391, now seen corresponding path program 1 times [2020-07-21 11:39:32,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:32,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454160930] [2020-07-21 11:39:32,210 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 11:39:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:39:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:32,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:32,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454160930] [2020-07-21 11:39:32,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:32,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:32,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428057599] [2020-07-21 11:39:32,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:32,344 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2020-07-21 11:39:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:32,466 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-21 11:39:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:32,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 11:39:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:32,471 INFO L225 Difference]: With dead ends: 57 [2020-07-21 11:39:32,471 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 11:39:32,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:39:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 11:39:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 11:39:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 11:39:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 11:39:32,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-07-21 11:39:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:32,489 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 11:39:32,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 11:39:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:39:32,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:32,491 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 11:39:32,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:32,708 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1471852900, now seen corresponding path program 1 times [2020-07-21 11:39:32,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:32,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303204296] [2020-07-21 11:39:32,711 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 11:39:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:32,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:32,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:32,811 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:39:32,812 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:39:33,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:33,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:39:33 BoogieIcfgContainer [2020-07-21 11:39:33,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:39:33,066 INFO L168 Benchmark]: Toolchain (without parser) took 2945.62 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 103.2 MB in the beginning and 91.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,068 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.19 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,070 INFO L168 Benchmark]: Boogie Preprocessor took 164.77 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,071 INFO L168 Benchmark]: RCFGBuilder took 413.07 ms. Allocated memory is still 203.4 MB. Free memory was 180.4 MB in the beginning and 163.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,072 INFO L168 Benchmark]: TraceAbstraction took 2052.97 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 91.5 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:33,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.19 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.77 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.5 MB in the beginning and 180.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.07 ms. Allocated memory is still 203.4 MB. Free memory was 180.4 MB in the beginning and 163.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2052.97 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 91.5 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L15] unsigned int N_COL=__VERIFIER_nondet_uint(); [L16] unsigned int j,k; [L17] int matriz[N_COL][N_LIN], maior; [L19] maior = __VERIFIER_nondet_int() [L20] j=0 VAL [j=0, maior=-1, matriz={2:0}, N_COL=1, N_LIN=1] [L20] COND TRUE jmaior [L26] EXPR matriz[j][k] [L26] maior = matriz[j][k] [L21] k++ VAL [j=0, k=1, maior=0, matriz={2:0}, N_COL=1, N_LIN=1] [L21] COND FALSE !(k