/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/matrix-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:20:20,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:20:20,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:20:20,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:20:20,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:20:20,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:20:20,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:20:20,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:20:20,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:20:20,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:20:20,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:20:20,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:20:20,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:20:20,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:20:20,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:20:20,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:20:20,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:20:20,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:20:20,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:20:20,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:20:20,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:20:20,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:20:20,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:20:20,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:20:20,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:20:20,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:20:20,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:20:20,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:20:20,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:20:20,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:20:20,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:20:20,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:20:20,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:20:20,930 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:20:20,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:20:20,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:20:20,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:20:20,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:20:20,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:20:20,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:20:20,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:20:20,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:20:20,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:20:20,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:20:20,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:20:20,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:20:20,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:20:20,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:20:20,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:20:20,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:20:20,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:20:20,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:20:20,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:20:20,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:20:20,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:20:21,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:20:21,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:20:21,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:20:21,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:20:21,396 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:20:21,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/matrix-2.c [2020-12-22 04:20:21,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb2e41c7/b93811ffe19245e4a3b40d583cd9c76a/FLAGf643d0111 [2020-12-22 04:20:22,231 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:20:22,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2.c [2020-12-22 04:20:22,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb2e41c7/b93811ffe19245e4a3b40d583cd9c76a/FLAGf643d0111 [2020-12-22 04:20:22,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb2e41c7/b93811ffe19245e4a3b40d583cd9c76a [2020-12-22 04:20:22,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:20:22,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:20:22,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:20:22,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:20:22,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:20:22,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59993826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22, skipping insertion in model container [2020-12-22 04:20:22,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:20:22,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:20:22,778 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2.c[320,333] [2020-12-22 04:20:22,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:20:22,813 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:20:22,832 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2.c[320,333] [2020-12-22 04:20:22,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:20:22,885 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:20:22,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22 WrapperNode [2020-12-22 04:20:22,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:20:22,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:20:22,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:20:22,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:20:22,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:20:22,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:20:22,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:20:22,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:20:22,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:22,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:23,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:23,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:23,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (1/1) ... [2020-12-22 04:20:23,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:20:23,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:20:23,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:20:23,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:20:23,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (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 [2020-12-22 04:20:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:20:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:20:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:20:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:20:23,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:20:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:20:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:20:23,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:20:23,636 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 04:20:23,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:20:23 BoogieIcfgContainer [2020-12-22 04:20:23,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:20:23,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:20:23,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:20:23,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:20:23,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:20:22" (1/3) ... [2020-12-22 04:20:23,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ce5ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:20:23, skipping insertion in model container [2020-12-22 04:20:23,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:20:22" (2/3) ... [2020-12-22 04:20:23,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ce5ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:20:23, skipping insertion in model container [2020-12-22 04:20:23,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:20:23" (3/3) ... [2020-12-22 04:20:23,664 INFO L111 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2020-12-22 04:20:23,679 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:20:23,688 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:20:23,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:20:23,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:20:23,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:20:23,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:20:23,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:20:23,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:20:23,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:20:23,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:20:23,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:20:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 04:20:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:20:23,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:23,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:23,758 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 228332486, now seen corresponding path program 1 times [2020-12-22 04:20:23,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:23,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565797371] [2020-12-22 04:20:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:23,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:20:23,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052325153] [2020-12-22 04:20:23,886 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:20:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:24,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565797371] [2020-12-22 04:20:24,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:20:24,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052325153] [2020-12-22 04:20:24,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:24,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:20:24,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442376969] [2020-12-22 04:20:24,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:20:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:20:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:24,193 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-12-22 04:20:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:24,335 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2020-12-22 04:20:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:20:24,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 04:20:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:24,347 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:20:24,347 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:20:24,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:20:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:20:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2020-12-22 04:20:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:20:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-22 04:20:24,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2020-12-22 04:20:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:24,391 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-22 04:20:24,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:20:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-22 04:20:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:20:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:24,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:24,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 04:20:24,606 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1185124407, now seen corresponding path program 1 times [2020-12-22 04:20:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270911025] [2020-12-22 04:20:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:24,619 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:20:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550450821] [2020-12-22 04:20:24,620 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:20:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:20:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:20:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:20:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270911025] [2020-12-22 04:20:24,820 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:20:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550450821] [2020-12-22 04:20:24,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:20:24,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:20:24,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974892675] [2020-12-22 04:20:24,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:20:24,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:20:24,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:20:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:20:24,824 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-22 04:20:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:20:24,909 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-12-22 04:20:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:20:24,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 04:20:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:20:24,911 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:20:24,911 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:20:24,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:20:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:20:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-12-22 04:20:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:20:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-22 04:20:24,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-22 04:20:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:20:24,918 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-22 04:20:24,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:20:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-22 04:20:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:20:24,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:20:24,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:20:25,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:25,133 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:20:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:20:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash 206458815, now seen corresponding path program 1 times [2020-12-22 04:20:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:20:25,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737022988] [2020-12-22 04:20:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:20:25,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:20:25,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810598562] [2020-12-22 04:20:25,153 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:20:25,226 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:20:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:20:25,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:20:25,298 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:20:25,299 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:20:25,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:20:25,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:20:25 BoogieIcfgContainer [2020-12-22 04:20:25,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:20:25,558 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:20:25,558 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:20:25,559 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:20:25,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:20:23" (3/4) ... [2020-12-22 04:20:25,562 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:20:25,620 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/matrix-2.c-witness.graphml [2020-12-22 04:20:25,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:20:25,622 INFO L168 Benchmark]: Toolchain (without parser) took 3035.42 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 60.1 MB in the end (delta: 66.5 MB). Peak memory consumption was 67.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,623 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 122.9 MB in the end (delta: 96.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:20:25,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,625 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.06 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,626 INFO L168 Benchmark]: Boogie Preprocessor took 70.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,626 INFO L168 Benchmark]: RCFGBuilder took 609.54 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 130.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,627 INFO L168 Benchmark]: TraceAbstraction took 1911.01 ms. Allocated memory is still 151.0 MB. Free memory was 130.4 MB in the beginning and 62.2 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,628 INFO L168 Benchmark]: Witness Printer took 62.05 ms. Allocated memory is still 151.0 MB. Free memory was 62.2 MB in the beginning and 60.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:20:25,633 INFO L339 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 151.0 MB. Free memory was 123.0 MB in the beginning and 122.9 MB in the end (delta: 96.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 294.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 71.06 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 609.54 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 130.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1911.01 ms. Allocated memory is still 151.0 MB. Free memory was 130.4 MB in the beginning and 62.2 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 8.0 GB. * Witness Printer took 62.05 ms. Allocated memory is still 151.0 MB. Free memory was 62.2 MB in the beginning and 60.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L17] unsigned int N_COL=__VERIFIER_nondet_uint(); [L18] unsigned int j,k; [L19] int matriz[N_COL][N_LIN], maior; [L21] maior = __VERIFIER_nondet_int() [L22] j=0 [L22] COND TRUE jmaior [L28] EXPR matriz[j][k] [L28] maior = matriz[j][k] [L23] k++ [L23] COND FALSE !(k