/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 16:43:35,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:43:35,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:43:35,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:43:35,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:43:35,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:43:35,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:43:35,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:43:35,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:43:35,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:43:35,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:43:35,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:43:35,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:43:35,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:43:35,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:43:35,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:43:35,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:43:35,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:43:35,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:43:35,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:43:35,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:43:35,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:43:35,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:43:35,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:43:35,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:43:35,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:43:35,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:43:35,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:43:35,099 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 16:43:35,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:43:35,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:43:35,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:43:35,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:43:35,142 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:43:35,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:43:35,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:43:35,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:43:35,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:43:35,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:43:35,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:43:35,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:43:35,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:43:35,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:43:35,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:43:35,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:43:35,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:43:35,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:43:35,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:43:35,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:43:35,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:43:35,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:43:35,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:43:35,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:43:35,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:43:35,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:43:35,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:35,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:43:35,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:43:35,148 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:43:35,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:43:35,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:43:35,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:43:35,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:43:35,432 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:43:35,433 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-2.c [2020-07-21 16:43:35,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c96532c81/cfc014159cd545efb166e8e9cce6f681/FLAG93194033c [2020-07-21 16:43:35,942 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:43:35,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-2.c [2020-07-21 16:43:35,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c96532c81/cfc014159cd545efb166e8e9cce6f681/FLAG93194033c [2020-07-21 16:43:36,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c96532c81/cfc014159cd545efb166e8e9cce6f681 [2020-07-21 16:43:36,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:43:36,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:43:36,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:43:36,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:43:36,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:43:36,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f41f43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36, skipping insertion in model container [2020-07-21 16:43:36,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:43:36,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:43:36,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:43:36,582 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:43:36,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:43:36,622 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:43:36,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36 WrapperNode [2020-07-21 16:43:36,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:43:36,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:43:36,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:43:36,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:43:36,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (1/1) ... [2020-07-21 16:43:36,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:43:36,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:43:36,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:43:36,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:43:36,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (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 16:43:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:43:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:43:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:43:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:43:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:43:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:43:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:43:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:43:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:43:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:43:37,141 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:43:37,142 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:43:37,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:37 BoogieIcfgContainer [2020-07-21 16:43:37,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:43:37,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:43:37,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:43:37,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:43:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:43:36" (1/3) ... [2020-07-21 16:43:37,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6157a61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:37, skipping insertion in model container [2020-07-21 16:43:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:36" (2/3) ... [2020-07-21 16:43:37,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6157a61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:37, skipping insertion in model container [2020-07-21 16:43:37,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:37" (3/3) ... [2020-07-21 16:43:37,152 INFO L109 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2020-07-21 16:43:37,160 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:43:37,166 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:43:37,177 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:43:37,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:43:37,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:43:37,197 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:43:37,197 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:43:37,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:43:37,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:43:37,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:43:37,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:43:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 16:43:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:43:37,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:37,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:43:37,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2125374060, now seen corresponding path program 1 times [2020-07-21 16:43:37,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:37,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81070237] [2020-07-21 16:43:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:43:37,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:37,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:43:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:37,351 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 16:43:37,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:43:37,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81070237] [2020-07-21 16:43:37,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:43:37,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:43:37,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924738889] [2020-07-21 16:43:37,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:43:37,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:43:37,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:43:37,376 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-07-21 16:43:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:37,398 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2020-07-21 16:43:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:43:37,400 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 16:43:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:37,408 INFO L225 Difference]: With dead ends: 52 [2020-07-21 16:43:37,408 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 16:43:37,412 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 16:43:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 16:43:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 16:43:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 16:43:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 16:43:37,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-07-21 16:43:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:37,457 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 16:43:37,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:43:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 16:43:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:43:37,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:37,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:43:37,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:37,673 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash 739661195, now seen corresponding path program 1 times [2020-07-21 16:43:37,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:37,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808338345] [2020-07-21 16:43:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:43:37,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:43:37,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:37,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:43:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:37,810 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 16:43:37,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:43:37,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808338345] [2020-07-21 16:43:37,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:43:37,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:43:37,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871054320] [2020-07-21 16:43:37,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:43:37,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:43:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:43:37,816 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-07-21 16:43:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:37,897 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-07-21 16:43:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:43:37,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 16:43:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:37,901 INFO L225 Difference]: With dead ends: 49 [2020-07-21 16:43:37,901 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 16:43:37,902 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 16:43:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 16:43:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-07-21 16:43:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:43:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-21 16:43:37,914 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-07-21 16:43:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:37,914 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-21 16:43:37,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:43:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-21 16:43:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:43:37,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:37,916 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 16:43:38,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:38,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1656958391, now seen corresponding path program 1 times [2020-07-21 16:43:38,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:38,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410599021] [2020-07-21 16:43:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:43:38,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:43:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:43:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:43:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:43:38,218 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 16:43:38,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:43:38,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410599021] [2020-07-21 16:43:38,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:43:38,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:43:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845450118] [2020-07-21 16:43:38,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:43:38,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:43:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:43:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:43:38,224 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2020-07-21 16:43:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:43:38,325 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-21 16:43:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:43:38,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 16:43:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:43:38,327 INFO L225 Difference]: With dead ends: 57 [2020-07-21 16:43:38,328 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 16:43:38,330 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 16:43:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 16:43:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 16:43:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 16:43:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 16:43:38,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-07-21 16:43:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:43:38,343 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 16:43:38,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:43:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 16:43:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 16:43:38,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:43:38,345 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 16:43:38,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:38,559 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:43:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:43:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1471852900, now seen corresponding path program 1 times [2020-07-21 16:43:38,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:43:38,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090325456] [2020-07-21 16:43:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:43:38,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:43:38,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:43:38,640 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:43:38,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:43:38,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:43:38,678 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:43:38,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:43:38,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:43:38 BoogieIcfgContainer [2020-07-21 16:43:38,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:43:38,927 INFO L168 Benchmark]: Toolchain (without parser) took 2587.84 ms. Allocated memory was 146.3 MB in the beginning and 233.8 MB in the end (delta: 87.6 MB). Free memory was 102.3 MB in the beginning and 198.9 MB in the end (delta: -96.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:43:38,928 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 16:43:38,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.12 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:38,930 INFO L168 Benchmark]: Boogie Preprocessor took 122.28 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 180.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:38,934 INFO L168 Benchmark]: RCFGBuilder took 400.27 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:43:38,936 INFO L168 Benchmark]: TraceAbstraction took 1778.48 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 163.4 MB in the beginning and 198.9 MB in the end (delta: -35.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:43:38,942 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.12 ms. Allocated memory is still 146.3 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.28 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 180.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.27 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 163.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1778.48 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 163.4 MB in the beginning and 198.9 MB in the end (delta: -35.5 MB). There was no memory consumed. 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=0, 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=1, matriz={2:0}, N_COL=1, N_LIN=1] [L21] COND FALSE !(k