/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:49:25,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:49:25,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:49:25,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:49:25,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:49:25,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:49:25,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:49:25,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:49:25,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:49:25,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:49:25,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:49:25,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:49:25,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:49:25,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:49:25,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:49:25,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:49:25,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:49:25,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:49:25,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:49:25,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:49:25,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:49:25,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:49:25,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:49:25,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:49:25,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:49:25,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:49:25,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:49:25,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:49:25,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:49:25,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:49:25,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:49:25,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:49:25,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:49:25,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:49:25,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:49:25,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:49:25,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:49:25,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:49:25,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:49:25,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:49:25,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:49:25,677 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 [2020-09-24 21:49:25,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:49:25,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:49:25,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:49:25,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:49:25,724 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:49:25,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:49:25,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:49:25,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:49:25,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:49:25,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:49:25,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:49:25,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:49:25,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:49:25,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:49:25,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:49:25,727 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:49:25,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:49:25,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:49:25,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:49:25,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:49:25,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:49:25,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:25,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:49:25,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:49:25,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:49:25,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:49:25,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:49:25,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:49:25,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:49:25,730 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:49:26,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:49:26,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:49:26,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:49:26,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:49:26,217 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:49:26,219 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-09-24 21:49:26,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281fea054/d5d89a6617d1434b849cc2464069c3db/FLAG83829b337 [2020-09-24 21:49:26,863 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:49:26,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s1iff.c [2020-09-24 21:49:26,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281fea054/d5d89a6617d1434b849cc2464069c3db/FLAG83829b337 [2020-09-24 21:49:27,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281fea054/d5d89a6617d1434b849cc2464069c3db [2020-09-24 21:49:27,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:49:27,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:49:27,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:27,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:49:27,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:49:27,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc4fd3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27, skipping insertion in model container [2020-09-24 21:49:27,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:49:27,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:49:27,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:27,528 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:49:27,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:27,576 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:49:27,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27 WrapperNode [2020-09-24 21:49:27,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:27,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:49:27,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:49:27,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:49:27,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (1/1) ... [2020-09-24 21:49:27,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:49:27,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:49:27,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:49:27,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:49:27,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (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 [2020-09-24 21:49:27,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:49:27,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:49:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:49:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:49:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:49:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:49:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:49:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:49:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:49:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:49:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:49:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:49:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:49:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:49:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:49:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:49:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:49:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:49:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:49:28,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:49:28,173 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:49:28,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:28 BoogieIcfgContainer [2020-09-24 21:49:28,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:49:28,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:49:28,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:49:28,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:49:28,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:49:27" (1/3) ... [2020-09-24 21:49:28,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e17ec05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:28, skipping insertion in model container [2020-09-24 21:49:28,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:27" (2/3) ... [2020-09-24 21:49:28,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e17ec05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:28, skipping insertion in model container [2020-09-24 21:49:28,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:28" (3/3) ... [2020-09-24 21:49:28,191 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-09-24 21:49:28,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:49:28,218 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:49:28,249 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:49:28,303 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:49:28,304 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:49:28,304 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:49:28,304 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:49:28,304 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:49:28,304 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:49:28,305 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:49:28,305 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:49:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-24 21:49:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:49:28,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:28,347 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, 1, 1, 1, 1, 1] [2020-09-24 21:49:28,347 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-09-24 21:49:28,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:28,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339986906] [2020-09-24 21:49:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:28,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:49:28,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:28,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-24 21:49:28,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:28,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:28,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 21:49:28,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:28,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:49:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:28,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:28,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:28,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:49:28,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:28,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:28,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:28,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:28,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:28,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:28,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:28,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:28,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:49:28,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:28,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:28,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:28,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339986906] [2020-09-24 21:49:28,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:28,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:49:28,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706842235] [2020-09-24 21:49:28,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:49:28,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:49:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:49:28,959 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-09-24 21:49:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:29,164 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-09-24 21:49:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:49:29,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 21:49:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:29,188 INFO L225 Difference]: With dead ends: 113 [2020-09-24 21:49:29,188 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 21:49:29,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:49:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 21:49:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 21:49:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 21:49:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-24 21:49:29,271 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-09-24 21:49:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:29,273 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-24 21:49:29,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:49:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-24 21:49:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:49:29,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:29,278 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, 1, 1, 1, 1, 1] [2020-09-24 21:49:29,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:49:29,279 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-09-24 21:49:29,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:29,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705344416] [2020-09-24 21:49:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:29,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:29,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:49:29,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-09-24 21:49:29,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:49:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:29,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:49:29,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-09-24 21:49:29,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:29,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:29,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:29,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:49:29,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:29,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:29,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:29,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:29,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:29,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:49:29,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:29,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:29,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705344416] [2020-09-24 21:49:29,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:29,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:49:29,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265348538] [2020-09-24 21:49:29,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:49:29,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:49:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:49:29,848 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-09-24 21:49:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:30,013 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-09-24 21:49:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:49:30,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 21:49:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:30,016 INFO L225 Difference]: With dead ends: 80 [2020-09-24 21:49:30,016 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:49:30,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:49:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:49:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 21:49:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:49:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-24 21:49:30,027 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-09-24 21:49:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:30,028 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-24 21:49:30,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:49:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-24 21:49:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 21:49:30,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:30,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:30,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:49:30,031 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-09-24 21:49:30,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:30,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264255127] [2020-09-24 21:49:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:30,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:30,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:32,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:34,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:35,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:35,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:49:35,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:49:35,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 21:49:35,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:35,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:49:35,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:35,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:49:35,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:35,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:35,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:35,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:35,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:35,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:35,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:35,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:35,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:35,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:35,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:35,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:35,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:35,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:49:35,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:35,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:35,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:35,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:35,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:35,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264255127] [2020-09-24 21:49:35,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:35,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:49:35,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125903307] [2020-09-24 21:49:35,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:49:35,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:49:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:49:35,679 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2020-09-24 21:49:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:36,482 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-09-24 21:49:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:49:36,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-24 21:49:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:36,487 INFO L225 Difference]: With dead ends: 107 [2020-09-24 21:49:36,487 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 21:49:36,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:49:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 21:49:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-09-24 21:49:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 21:49:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-24 21:49:36,502 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48 [2020-09-24 21:49:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:36,502 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-24 21:49:36,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:49:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-24 21:49:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 21:49:36,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:36,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:36,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:49:36,505 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times [2020-09-24 21:49:36,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:36,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413869227] [2020-09-24 21:49:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:36,525 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-24 21:49:36,526 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-24 21:49:36,526 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:49:36,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:49:36,556 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-24 21:49:36,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:49:36 BoogieIcfgContainer [2020-09-24 21:49:36,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:49:36,561 INFO L168 Benchmark]: Toolchain (without parser) took 9350.20 ms. Allocated memory was 140.0 MB in the beginning and 272.6 MB in the end (delta: 132.6 MB). Free memory was 103.5 MB in the beginning and 115.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,562 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.12 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,564 INFO L168 Benchmark]: Boogie Preprocessor took 190.81 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 92.3 MB in the beginning and 182.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,565 INFO L168 Benchmark]: RCFGBuilder took 411.96 ms. Allocated memory is still 205.0 MB. Free memory was 182.2 MB in the beginning and 162.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,566 INFO L168 Benchmark]: TraceAbstraction took 8374.79 ms. Allocated memory was 205.0 MB in the beginning and 272.6 MB in the end (delta: 67.6 MB). Free memory was 162.3 MB in the beginning and 115.9 MB in the end (delta: 46.4 MB). Peak memory consumption was 114.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:36,571 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.12 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 190.81 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 92.3 MB in the beginning and 182.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.96 ms. Allocated memory is still 205.0 MB. Free memory was 182.2 MB in the beginning and 162.3 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8374.79 ms. Allocated memory was 205.0 MB in the beginning and 272.6 MB in the end (delta: 67.6 MB). Free memory was 162.3 MB in the beginning and 115.9 MB in the end (delta: 46.4 MB). Peak memory consumption was 114.1 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i