/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:34:41,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:34:41,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:34:41,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:34:41,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:34:41,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:34:41,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:34:41,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:34:41,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:34:41,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:34:41,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:34:41,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:34:41,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:34:41,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:34:41,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:34:41,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:34:41,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:34:41,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:34:41,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:34:41,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:34:41,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:34:41,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:34:41,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:34:41,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:34:41,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:34:41,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:34:41,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:34:41,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:34:41,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:34:41,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:34:41,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:34:41,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:34:41,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:34:41,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:34:41,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:34:41,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:34:41,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:34:41,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:34:41,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:34:41,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:34:41,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:34:41,834 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 [2020-09-21 12:34:41,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:34:41,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:34:41,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:34:41,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:34:41,878 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:34:41,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:34:41,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:34:41,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:34:41,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:34:41,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:34:41,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:34:41,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:34:41,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:34:41,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:34:41,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:34:41,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:34:41,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:34:41,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:34:41,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:34:41,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:34:41,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:34:41,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:34:41,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:34:41,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:34:41,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:34:41,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:34:41,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:34:41,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:34:41,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:34:41,884 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:34:42,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:34:42,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:34:42,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:34:42,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:34:42,419 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:34:42,420 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-09-21 12:34:42,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75567b919/37fa57e677ca49219ade59a89eb30f0a/FLAGb3f66dc16 [2020-09-21 12:34:43,069 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:34:43,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condgf.c [2020-09-21 12:34:43,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75567b919/37fa57e677ca49219ade59a89eb30f0a/FLAGb3f66dc16 [2020-09-21 12:34:43,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/75567b919/37fa57e677ca49219ade59a89eb30f0a [2020-09-21 12:34:43,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:34:43,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:34:43,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:43,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:34:43,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:34:43,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:43" (1/1) ... [2020-09-21 12:34:43,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73111a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:43, skipping insertion in model container [2020-09-21 12:34:43,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:43" (1/1) ... [2020-09-21 12:34:43,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:34:43,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:34:43,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:43,874 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:34:43,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:44,028 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:34:44,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44 WrapperNode [2020-09-21 12:34:44,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:44,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:34:44,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:34:44,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:34:44,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (1/1) ... [2020-09-21 12:34:44,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:34:44,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:34:44,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:34:44,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:34:44,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (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 [2020-09-21 12:34:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:34:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:34:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:34:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:34:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:34:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:34:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:34:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:34:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:34:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:34:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:34:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:34:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:34:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:34:44,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:34:44,521 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:34:44,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:44 BoogieIcfgContainer [2020-09-21 12:34:44,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:34:44,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:34:44,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:34:44,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:34:44,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:43" (1/3) ... [2020-09-21 12:34:44,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a50a29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:44, skipping insertion in model container [2020-09-21 12:34:44,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:44" (2/3) ... [2020-09-21 12:34:44,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a50a29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:44, skipping insertion in model container [2020-09-21 12:34:44,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:44" (3/3) ... [2020-09-21 12:34:44,538 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-09-21 12:34:44,556 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:34:44,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:34:44,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:34:44,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:34:44,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:34:44,666 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:34:44,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:34:44,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:34:44,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:34:44,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:34:44,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:34:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-21 12:34:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:34:44,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:44,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:44,713 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-09-21 12:34:44,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:44,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61477155] [2020-09-21 12:34:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:34:45,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:34:45,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-09-21 12:34:45,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:34:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:45,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 12:34:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:46,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:34:46,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:46,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:34:46,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:34:46,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:46,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61477155] [2020-09-21 12:34:46,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:46,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:34:46,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914526717] [2020-09-21 12:34:46,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:34:46,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:34:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:34:46,103 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-09-21 12:34:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:46,279 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-09-21 12:34:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:34:46,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 12:34:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:46,292 INFO L225 Difference]: With dead ends: 66 [2020-09-21 12:34:46,292 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 12:34:46,296 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 [2020-09-21 12:34:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 12:34:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 12:34:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:34:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-21 12:34:46,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-09-21 12:34:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:46,351 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-21 12:34:46,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:34:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-21 12:34:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:34:46,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:46,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:46,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:34:46,354 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-09-21 12:34:46,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:46,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119713185] [2020-09-21 12:34:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:34:47,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:34:47,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-09-21 12:34:47,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:34:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:34:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-21 12:34:47,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:47,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:47,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:34:47,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:47,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:47,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:47,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:34:47,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:47,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:47,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:47,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:47,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119713185] [2020-09-21 12:34:47,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:47,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:47,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054003455] [2020-09-21 12:34:47,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:47,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:47,318 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-09-21 12:34:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:47,548 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-09-21 12:34:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:47,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 12:34:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:47,554 INFO L225 Difference]: With dead ends: 62 [2020-09-21 12:34:47,554 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:34:47,556 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 [2020-09-21 12:34:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:34:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-09-21 12:34:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:34:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-21 12:34:47,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-09-21 12:34:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:47,596 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-21 12:34:47,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-21 12:34:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:34:47,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:47,600 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] [2020-09-21 12:34:47,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:34:47,601 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-09-21 12:34:47,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:47,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164691586] [2020-09-21 12:34:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:47,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:48,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:34:48,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-09-21 12:34:48,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:34:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:34:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:34:48,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:49,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:49,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:34:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:49,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:49,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:49,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:49,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164691586] [2020-09-21 12:34:49,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:49,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:34:49,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390123347] [2020-09-21 12:34:49,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:34:49,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:34:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:49,150 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-09-21 12:34:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:49,585 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-09-21 12:34:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:34:49,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-21 12:34:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:49,588 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:34:49,588 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 12:34:49,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:34:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 12:34:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 12:34:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 12:34:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-09-21 12:34:49,598 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-09-21 12:34:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:49,598 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-09-21 12:34:49,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:34:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-09-21 12:34:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:34:49,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:49,600 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] [2020-09-21 12:34:49,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:34:49,600 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-09-21 12:34:49,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:49,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685881841] [2020-09-21 12:34:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:34:49,621 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:34:49,621 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:34:49,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:34:49,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:34:49 BoogieIcfgContainer [2020-09-21 12:34:49,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:34:49,654 INFO L168 Benchmark]: Toolchain (without parser) took 6206.11 ms. Allocated memory was 139.5 MB in the beginning and 248.0 MB in the end (delta: 108.5 MB). Free memory was 102.0 MB in the beginning and 162.3 MB in the end (delta: -60.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,655 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 575.81 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.6 MB in the beginning and 179.9 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,657 INFO L168 Benchmark]: Boogie Preprocessor took 88.56 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,658 INFO L168 Benchmark]: RCFGBuilder took 407.91 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 159.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,659 INFO L168 Benchmark]: TraceAbstraction took 5121.58 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 158.3 MB in the beginning and 162.3 MB in the end (delta: -3.9 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:34:49,663 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 575.81 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.6 MB in the beginning and 179.9 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.56 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.91 ms. Allocated memory is still 201.3 MB. Free memory was 177.3 MB in the beginning and 159.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5121.58 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 158.3 MB in the beginning and 162.3 MB in the end (delta: -3.9 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a 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] = 0 [L30] i=0 [L30] COND TRUE i