/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 --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:01:46,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:01:46,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:01:46,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:01:46,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:01:46,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:01:46,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:01:46,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:01:46,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:01:46,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:01:46,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:01:46,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:01:46,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:01:46,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:01:46,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:01:46,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:01:46,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:01:46,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:01:46,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:01:46,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:01:46,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:01:46,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:01:46,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:01:46,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:01:46,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:01:46,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:01:46,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:01:46,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:01:46,633 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 22:01:46,655 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:01:46,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:01:46,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:01:46,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:01:46,657 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:01:46,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:01:46,657 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:01:46,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:01:46,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:01:46,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:01:46,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:01:46,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:01:46,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:01:46,659 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:01:46,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:01:46,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:01:46,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:01:46,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:01:46,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:01:46,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:01:46,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:01:46,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:01:46,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:01:46,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:01:46,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:01:46,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:01:46,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:01:46,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:01:46,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:01:46,662 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:01:46,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:01:46,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:01:46,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:01:46,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:01:46,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:01:46,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-08-18 22:01:47,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28b276b5f/1aac9da56b5f4f6b904d79331ac928d2/FLAGe767b00f7 [2020-08-18 22:01:47,465 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:01:47,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/modnf.c [2020-08-18 22:01:47,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28b276b5f/1aac9da56b5f4f6b904d79331ac928d2/FLAGe767b00f7 [2020-08-18 22:01:47,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28b276b5f/1aac9da56b5f4f6b904d79331ac928d2 [2020-08-18 22:01:47,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:01:47,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:01:47,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:47,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:01:47,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:01:47,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:47" (1/1) ... [2020-08-18 22:01:47,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592fd428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:47, skipping insertion in model container [2020-08-18 22:01:47,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:47" (1/1) ... [2020-08-18 22:01:47,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:01:47,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:01:48,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:48,106 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:01:48,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:48,144 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:01:48,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48 WrapperNode [2020-08-18 22:01:48,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:48,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:01:48,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:01:48,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:01:48,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (1/1) ... [2020-08-18 22:01:48,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:01:48,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:01:48,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:01:48,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:01:48,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (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 22:01:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:01:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:01:48,331 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:01:48,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:01:48,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:01:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:01:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:01:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:01:48,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:01:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:01:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:01:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:01:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:01:48,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:01:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:01:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:01:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:01:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:01:48,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:01:48,672 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:01:48,672 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 22:01:48,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:48 BoogieIcfgContainer [2020-08-18 22:01:48,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:01:48,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:01:48,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:01:48,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:01:48,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:01:47" (1/3) ... [2020-08-18 22:01:48,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b2c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:48, skipping insertion in model container [2020-08-18 22:01:48,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:48" (2/3) ... [2020-08-18 22:01:48,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b2c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:48, skipping insertion in model container [2020-08-18 22:01:48,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:48" (3/3) ... [2020-08-18 22:01:48,685 INFO L109 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-08-18 22:01:48,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:01:48,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:01:48,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:01:48,740 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:01:48,740 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:01:48,740 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:01:48,741 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:01:48,741 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:01:48,741 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:01:48,741 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:01:48,741 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:01:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-18 22:01:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:01:48,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:48,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:01:48,764 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-08-18 22:01:48,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:48,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485591366] [2020-08-18 22:01:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:48,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:48,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:49,003 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 22:01:49,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485591366] [2020-08-18 22:01:49,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:49,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:01:49,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158473325] [2020-08-18 22:01:49,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:01:49,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:01:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:01:49,029 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-18 22:01:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:49,131 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-08-18 22:01:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:01:49,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:01:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:49,142 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:01:49,144 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 22:01:49,148 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 22:01:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 22:01:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-18 22:01:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 22:01:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-18 22:01:49,194 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-08-18 22:01:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:49,194 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-18 22:01:49,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:01:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-18 22:01:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:01:49,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:49,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:01:49,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:01:49,196 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-08-18 22:01:49,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:49,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865686313] [2020-08-18 22:01:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:49,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:49,325 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 22:01:49,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865686313] [2020-08-18 22:01:49,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:49,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:01:49,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557142591] [2020-08-18 22:01:49,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:01:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:01:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:01:49,330 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-08-18 22:01:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:49,485 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-18 22:01:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:01:49,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 22:01:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:49,490 INFO L225 Difference]: With dead ends: 51 [2020-08-18 22:01:49,490 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 22:01:49,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:01:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 22:01:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-08-18 22:01:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 22:01:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-18 22:01:49,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-08-18 22:01:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:49,529 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-18 22:01:49,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:01:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-18 22:01:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 22:01:49,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:49,530 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, 1, 1] [2020-08-18 22:01:49,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:01:49,533 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-08-18 22:01:49,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:49,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823647973] [2020-08-18 22:01:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:49,577 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 22:01:49,577 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 22:01:49,578 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:01:49,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:01:49,605 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 22:01:49,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:01:49 BoogieIcfgContainer [2020-08-18 22:01:49,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:01:49,620 INFO L168 Benchmark]: Toolchain (without parser) took 1755.15 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 102.2 MB in the beginning and 107.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:49,622 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:01:49,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.44 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:49,625 INFO L168 Benchmark]: Boogie Preprocessor took 121.23 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 179.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:49,626 INFO L168 Benchmark]: RCFGBuilder took 409.39 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 162.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:49,628 INFO L168 Benchmark]: TraceAbstraction took 936.78 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 107.6 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:49,639 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.44 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.23 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 179.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.39 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 162.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 936.78 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 107.6 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i