/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqmf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:23:41,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:23:41,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:23:41,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:23:41,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:23:41,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:23:41,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:23:41,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:23:41,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:23:41,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:23:41,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:23:41,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:23:41,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:23:41,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:23:41,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:23:41,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:23:41,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:23:41,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:23:41,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:23:41,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:23:41,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:23:41,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:23:41,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:23:41,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:23:41,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:23:41,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:23:41,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:23:41,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:23:41,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:23:41,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 06:23:41,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:23:41,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:23:41,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:23:41,239 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 [2020-08-22 06:23:41,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:23:41,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:23:41,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:23:41,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:23:41,264 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:23:41,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:23:41,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:23:41,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:23:41,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:23:41,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:23:41,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:23:41,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:23:41,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:23:41,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:23:41,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:23:41,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:23:41,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:23:41,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:23:41,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:23:41,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:23:41,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:23:41,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:23:41,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:23:41,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:23:41,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:23:41,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:23:41,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:23:41,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:23:41,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:23:41,269 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:23:41,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:23:41,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:23:41,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:23:41,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:23:41,599 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:23:41,600 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqmf.c [2020-08-22 06:23:41,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911afd1ed/414c150973a043d4b0dca71b17a19c77/FLAGeb9277d7e [2020-08-22 06:23:42,072 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:23:42,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/nsqmf.c [2020-08-22 06:23:42,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911afd1ed/414c150973a043d4b0dca71b17a19c77/FLAGeb9277d7e [2020-08-22 06:23:42,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911afd1ed/414c150973a043d4b0dca71b17a19c77 [2020-08-22 06:23:42,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:23:42,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:23:42,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:23:42,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:23:42,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:23:42,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dfc093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42, skipping insertion in model container [2020-08-22 06:23:42,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:23:42,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:23:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:23:42,752 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:23:42,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:23:42,788 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:23:42,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42 WrapperNode [2020-08-22 06:23:42,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:23:42,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:23:42,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:23:42,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:23:42,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (1/1) ... [2020-08-22 06:23:42,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:23:42,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:23:42,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:23:42,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:23:42,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (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 [2020-08-22 06:23:43,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:23:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:23:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 06:23:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 06:23:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:23:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:23:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:23:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 06:23:43,342 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:23:43,342 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 06:23:43,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:23:43 BoogieIcfgContainer [2020-08-22 06:23:43,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:23:43,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:23:43,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:23:43,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:23:43,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:23:42" (1/3) ... [2020-08-22 06:23:43,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55860f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:23:43, skipping insertion in model container [2020-08-22 06:23:43,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:23:42" (2/3) ... [2020-08-22 06:23:43,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55860f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:23:43, skipping insertion in model container [2020-08-22 06:23:43,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:23:43" (3/3) ... [2020-08-22 06:23:43,359 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2020-08-22 06:23:43,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:23:43,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:23:43,392 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:23:43,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:23:43,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:23:43,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:23:43,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:23:43,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:23:43,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:23:43,417 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:23:43,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:23:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 06:23:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:23:43,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:23:43,445 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] [2020-08-22 06:23:43,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:23:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:23:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-08-22 06:23:43,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:23:43,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625174427] [2020-08-22 06:23:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:23:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:23:43,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:23:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:23:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 06:23:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:23:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:23:43,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625174427] [2020-08-22 06:23:43,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:23:43,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:23:43,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229254836] [2020-08-22 06:23:43,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:23:43,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:23:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:23:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:23:43,730 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-22 06:23:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:23:43,865 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-08-22 06:23:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:23:43,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:23:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:23:43,876 INFO L225 Difference]: With dead ends: 58 [2020-08-22 06:23:43,877 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 06:23:43,880 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 [2020-08-22 06:23:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 06:23:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 06:23:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 06:23:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-22 06:23:43,918 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-08-22 06:23:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:23:43,918 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-22 06:23:43,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:23:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-22 06:23:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:23:43,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:23:43,920 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] [2020-08-22 06:23:43,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:23:43,921 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:23:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:23:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-08-22 06:23:43,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:23:43,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373259433] [2020-08-22 06:23:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:23:43,947 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 06:23:43,947 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 06:23:43,947 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 06:23:43,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:23:43,967 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 06:23:43,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:23:43 BoogieIcfgContainer [2020-08-22 06:23:43,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:23:43,971 INFO L168 Benchmark]: Toolchain (without parser) took 1456.59 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 104.2 MB in the beginning and 132.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,972 INFO L168 Benchmark]: CDTParser took 0.23 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,974 INFO L168 Benchmark]: Boogie Preprocessor took 156.56 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,975 INFO L168 Benchmark]: RCFGBuilder took 402.94 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.3 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,976 INFO L168 Benchmark]: TraceAbstraction took 617.34 ms. Allocated memory is still 203.9 MB. Free memory was 163.7 MB in the beginning and 132.7 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:23:43,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.37 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.56 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.94 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.3 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 617.34 ms. Allocated memory is still 203.9 MB. Free memory was 163.7 MB in the beginning and 132.7 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 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); [L29] b[0] = 1 [L30] a[0] = 1 [L32] i=1 [L32] COND FALSE !(i