/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/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:48:57,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:48:57,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:48:57,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:48:57,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:48:57,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:48:57,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:48:57,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:48:57,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:48:57,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:48:57,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:48:57,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:48:57,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:48:57,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:48:57,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:48:57,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:48:57,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:48:57,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:48:57,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:48:57,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:48:57,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:48:57,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:48:57,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:48:57,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:48:57,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:48:57,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:48:57,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:48:57,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:48:57,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:48:57,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:48:57,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:48:57,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:48:57,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:48:57,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:48:57,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:48:57,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:48:57,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:48:57,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:48:57,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:48:57,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:48:57,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:48:57,827 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 21:48:57,877 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:48:57,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:48:57,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:48:57,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:48:57,881 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:48:57,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:48:57,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:48:57,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:48:57,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:48:57,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:48:57,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:48:57,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:48:57,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:48:57,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:48:57,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:48:57,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:48:57,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:48:57,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:48:57,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:48:57,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:48:57,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:48:57,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:48:57,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:48:57,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:48:57,888 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 21:48:58,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:48:58,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:48:58,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:48:58,382 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:48:58,383 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:48:58,384 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 21:48:58,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1a199fbf/74ecfb176ee54b4cb3b82ae6d38a8293/FLAG093893257 [2020-09-24 21:48:59,070 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:48:59,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condnf.c [2020-09-24 21:48:59,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1a199fbf/74ecfb176ee54b4cb3b82ae6d38a8293/FLAG093893257 [2020-09-24 21:48:59,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1a199fbf/74ecfb176ee54b4cb3b82ae6d38a8293 [2020-09-24 21:48:59,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:48:59,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:48:59,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:59,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:48:59,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:48:59,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc1cb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59, skipping insertion in model container [2020-09-24 21:48:59,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:48:59,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:48:59,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:59,772 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:48:59,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:59,830 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:48:59,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59 WrapperNode [2020-09-24 21:48:59,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:59,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:48:59,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:48:59,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:48:59,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (1/1) ... [2020-09-24 21:48:59,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:48:59,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:48:59,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:48:59,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:48:59,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (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 21:49:00,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:49:00,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:49:00,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:49:00,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:49:00,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:49:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:49:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:49:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:49:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:49:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:49:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:49:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:49:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:49:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:49:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:49:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:49:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:49:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:49:00,451 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:49:00,452 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 21:49:00,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:00 BoogieIcfgContainer [2020-09-24 21:49:00,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:49:00,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:49:00,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:49:00,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:49:00,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:48:59" (1/3) ... [2020-09-24 21:49:00,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d850c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:00, skipping insertion in model container [2020-09-24 21:49:00,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:59" (2/3) ... [2020-09-24 21:49:00,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d850c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:00, skipping insertion in model container [2020-09-24 21:49:00,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:00" (3/3) ... [2020-09-24 21:49:00,468 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-09-24 21:49:00,480 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:49:00,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:49:00,515 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:49:00,545 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:49:00,545 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:49:00,545 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:49:00,545 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:49:00,545 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:49:00,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:49:00,545 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:49:00,546 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:49:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-09-24 21:49:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:49:00,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:00,584 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 21:49:00,585 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:00,594 INFO L82 PathProgramCache]: Analyzing trace with hash -386984160, now seen corresponding path program 1 times [2020-09-24 21:49:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:00,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933935220] [2020-09-24 21:49:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:00,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:00,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:49:00,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:00,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-24 21:49:00,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 21:49:00,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:00,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:49:01,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:01,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:01,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:01,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:49:01,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:01,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:01,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:01,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:01,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:01,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:01,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:49:01,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:01,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:01,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:01,106 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 21:49:01,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933935220] [2020-09-24 21:49:01,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:01,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:49:01,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639016541] [2020-09-24 21:49:01,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:49:01,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:49:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:49:01,141 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-09-24 21:49:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:01,326 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-09-24 21:49:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:49:01,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 21:49:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:01,340 INFO L225 Difference]: With dead ends: 107 [2020-09-24 21:49:01,340 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:49:01,345 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 21:49:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:49:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 21:49:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 21:49:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-24 21:49:01,399 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 31 [2020-09-24 21:49:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:01,400 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-24 21:49:01,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:49:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-24 21:49:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:49:01,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:01,402 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 21:49:01,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:49:01,402 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1278196063, now seen corresponding path program 1 times [2020-09-24 21:49:01,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:01,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494094781] [2020-09-24 21:49:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:02,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:49:02,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:49:02,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-09-24 21:49:02,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:49:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:02,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:49:02,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:02,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:02,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:02,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:02,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:02,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:49:02,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:02,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:02,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:02,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:02,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:02,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:02,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:49:02,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:02,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:02,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:02,186 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 21:49:02,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494094781] [2020-09-24 21:49:02,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:49:02,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:49:02,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214152743] [2020-09-24 21:49:02,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:49:02,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:49:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:49:02,192 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 5 states. [2020-09-24 21:49:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:02,397 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-09-24 21:49:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:49:02,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 21:49:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:02,399 INFO L225 Difference]: With dead ends: 85 [2020-09-24 21:49:02,400 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 21:49:02,401 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 21:49:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 21:49:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-24 21:49:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 21:49:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-24 21:49:02,413 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 31 [2020-09-24 21:49:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:02,413 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-24 21:49:02,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:49:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-24 21:49:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:49:02,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:02,415 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] [2020-09-24 21:49:02,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:49:02,416 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash -620119431, now seen corresponding path program 1 times [2020-09-24 21:49:02,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:02,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812436152] [2020-09-24 21:49:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 21:49:04,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:49:04,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-09-24 21:49:04,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:49:04,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:04,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:49:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:05,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:05,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:05,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:49:05,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:05,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:05,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:05,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:05,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:05,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:05,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:05,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:49:05,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:05,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:05,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:05,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:05,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:05,036 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 21:49:05,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812436152] [2020-09-24 21:49:05,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:05,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:49:05,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882903536] [2020-09-24 21:49:05,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:49:05,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:49:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:49:05,040 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-09-24 21:49:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:06,658 INFO L93 Difference]: Finished difference Result 162 states and 175 transitions. [2020-09-24 21:49:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 21:49:06,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-24 21:49:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:06,664 INFO L225 Difference]: With dead ends: 162 [2020-09-24 21:49:06,665 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 21:49:06,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=357, Invalid=1713, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:49:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 21:49:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 98. [2020-09-24 21:49:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 21:49:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2020-09-24 21:49:06,690 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 46 [2020-09-24 21:49:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:06,691 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2020-09-24 21:49:06,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:49:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2020-09-24 21:49:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 21:49:06,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:06,693 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 21:49:06,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:49:06,694 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1321326334, now seen corresponding path program 1 times [2020-09-24 21:49:06,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:06,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832702650] [2020-09-24 21:49:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:49:06,716 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:49:06,717 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:49:06,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:49:06,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:49:06 BoogieIcfgContainer [2020-09-24 21:49:06,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:49:06,750 INFO L168 Benchmark]: Toolchain (without parser) took 7335.35 ms. Allocated memory was 140.5 MB in the beginning and 277.9 MB in the end (delta: 137.4 MB). Free memory was 101.9 MB in the beginning and 171.5 MB in the end (delta: -69.5 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:06,751 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:49:06,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.63 ms. Allocated memory is still 140.5 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:06,753 INFO L168 Benchmark]: Boogie Preprocessor took 146.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:06,754 INFO L168 Benchmark]: RCFGBuilder took 478.35 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:06,755 INFO L168 Benchmark]: TraceAbstraction took 6286.76 ms. Allocated memory was 203.4 MB in the beginning and 277.9 MB in the end (delta: 74.4 MB). Free memory was 161.9 MB in the beginning and 171.5 MB in the end (delta: -9.6 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:06,759 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.63 ms. Allocated memory is still 140.5 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 478.35 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6286.76 ms. Allocated memory was 203.4 MB in the beginning and 277.9 MB in the end (delta: 74.4 MB). Free memory was 161.9 MB in the beginning and 171.5 MB in the end (delta: -9.6 MB). Peak memory consumption was 64.8 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] int *a = malloc(sizeof(int)*N); [L28] i=0 [L28] COND TRUE i N [L36] EXPR a[i] [L36] a[i] = a[i] [L33] i++ [L33] COND FALSE !(i