/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:30,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:30,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:30,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:30,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:30,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:30,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:30,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:30,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:30,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:30,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:30,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:30,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:30,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:30,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:30,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:30,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:30,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:30,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:30,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:30,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:30,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:30,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:30,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:30,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:30,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:30,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:30,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:30,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:23:30,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:30,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:30,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:30,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:30,837 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:30,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:30,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:30,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:30,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:30,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:30,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:30,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:30,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:30,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:30,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:30,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:30,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:30,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:30,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:30,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:30,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:30,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:30,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:30,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:30,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:30,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:30,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:30,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:30,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:30,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:23:31,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:31,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:31,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:31,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:31,136 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:31,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ncompf.c [2020-08-18 16:23:31,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9178ebb62/da068549a5e84ff2b80bf8eb64752375/FLAGacbf253b7 [2020-08-18 16:23:31,673 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:31,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ncompf.c [2020-08-18 16:23:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9178ebb62/da068549a5e84ff2b80bf8eb64752375/FLAGacbf253b7 [2020-08-18 16:23:32,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9178ebb62/da068549a5e84ff2b80bf8eb64752375 [2020-08-18 16:23:32,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:32,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:32,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:32,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:32,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:32,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32, skipping insertion in model container [2020-08-18 16:23:32,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:32,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:32,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:32,267 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:32,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:32,309 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:32,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32 WrapperNode [2020-08-18 16:23:32,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:32,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:32,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:32,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:32,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... [2020-08-18 16:23:32,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:32,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:32,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:32,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:32,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:32,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:32,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:32,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:32,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:32,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:32,807 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 16:23:32,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:32 BoogieIcfgContainer [2020-08-18 16:23:32,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:32,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:32,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:32,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:32,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:32" (1/3) ... [2020-08-18 16:23:32,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd511c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:32, skipping insertion in model container [2020-08-18 16:23:32,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:32" (2/3) ... [2020-08-18 16:23:32,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd511c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:32, skipping insertion in model container [2020-08-18 16:23:32,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:32" (3/3) ... [2020-08-18 16:23:32,820 INFO L109 eAbstractionObserver]: Analyzing ICFG ncompf.c [2020-08-18 16:23:32,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:32,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:32,883 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:32,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:32,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:32,935 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:32,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:32,936 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:32,936 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:32,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:32,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-08-18 16:23:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:23:32,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:32,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:32,991 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:32,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1155719453, now seen corresponding path program 1 times [2020-08-18 16:23:33,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:33,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214629601] [2020-08-18 16:23:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:33,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214629601] [2020-08-18 16:23:33,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:33,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:23:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429207522] [2020-08-18 16:23:33,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:23:33,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:23:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:33,287 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-08-18 16:23:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:33,452 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-08-18 16:23:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:23:33,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:23:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:33,463 INFO L225 Difference]: With dead ends: 64 [2020-08-18 16:23:33,464 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 16:23:33,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 16:23:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-08-18 16:23:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 16:23:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 16:23:33,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-08-18 16:23:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:33,509 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 16:23:33,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:23:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 16:23:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:23:33,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:33,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:33,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:33,512 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:33,512 INFO L82 PathProgramCache]: Analyzing trace with hash -124144225, now seen corresponding path program 1 times [2020-08-18 16:23:33,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:33,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544849827] [2020-08-18 16:23:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:33,540 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 16:23:33,541 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 16:23:33,541 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:33,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:33,564 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 16:23:33,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:33 BoogieIcfgContainer [2020-08-18 16:23:33,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:33,567 INFO L168 Benchmark]: Toolchain (without parser) took 1543.68 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 104.2 MB in the beginning and 130.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:33,568 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:23:33,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.95 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:33,571 INFO L168 Benchmark]: Boogie Preprocessor took 128.48 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 93.3 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:33,572 INFO L168 Benchmark]: RCFGBuilder took 371.74 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 163.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:33,573 INFO L168 Benchmark]: TraceAbstraction took 751.57 ms. Allocated memory is still 205.0 MB. Free memory was 163.0 MB in the beginning and 130.9 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:33,577 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.95 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.48 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 93.3 MB in the beginning and 182.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.74 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 163.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 751.57 ms. Allocated memory is still 205.0 MB. Free memory was 163.0 MB in the beginning and 130.9 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L28] long long *c = malloc(sizeof(long long)*N); [L30] a[0] = 6 [L31] b[0] = 1 [L32] c[0] = 0 [L33] i=1 [L33] COND FALSE !(i