/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=SHALLOWEST --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/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:03:28,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:03:28,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:03:28,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:03:28,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:03:28,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:03:28,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:03:28,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:03:28,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:03:28,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:03:28,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:03:28,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:03:28,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:03:28,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:03:28,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:03:29,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:03:29,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:03:29,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:03:29,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:03:29,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:03:29,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:03:29,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:03:29,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:03:29,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:03:29,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:03:29,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:03:29,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:03:29,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:03:29,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:03:29,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:03:29,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:03:29,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:03:29,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:03:29,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:03:29,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:03:29,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:03:29,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:03:29,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:03:29,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:03:29,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:03:29,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:03:29,040 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 [2020-09-25 00:03:29,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:03:29,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:03:29,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:03:29,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:03:29,092 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:03:29,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:03:29,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:03:29,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:03:29,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:03:29,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:03:29,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:03:29,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:03:29,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:03:29,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:03:29,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:03:29,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:03:29,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:03:29,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:03:29,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:03:29,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:03:29,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:03:29,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:03:29,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:03:29,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:03:29,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:03:29,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:03:29,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:03:29,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:03:29,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:03:29,099 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:03:29,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:03:29,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:03:29,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:03:29,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:03:29,639 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:03:29,641 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-09-25 00:03:29,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ad56586/6a3dd05c19ef4304a2d575c63665681a/FLAG198a29056 [2020-09-25 00:03:30,301 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:03:30,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2iff.c [2020-09-25 00:03:30,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ad56586/6a3dd05c19ef4304a2d575c63665681a/FLAG198a29056 [2020-09-25 00:03:30,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2ad56586/6a3dd05c19ef4304a2d575c63665681a [2020-09-25 00:03:30,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:03:30,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:03:30,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:03:30,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:03:30,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:03:30,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:30,671 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 25.09 12:03:30, skipping insertion in model container [2020-09-25 00:03:30,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:30,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:03:30,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:03:30,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:03:30,954 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:03:30,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:03:30,998 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:03:30,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30 WrapperNode [2020-09-25 00:03:30,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:03:31,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:03:31,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:03:31,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:03:31,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (1/1) ... [2020-09-25 00:03:31,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:03:31,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:03:31,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:03:31,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:03:31,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (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 [2020-09-25 00:03:31,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:03:31,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:03:31,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:03:31,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:03:31,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:03:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:03:31,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:03:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:03:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:03:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:03:31,222 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 00:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 00:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:03:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:03:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:03:31,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:03:31,519 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 00:03:31,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:03:31 BoogieIcfgContainer [2020-09-25 00:03:31,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:03:31,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:03:31,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:03:31,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:03:31,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:03:30" (1/3) ... [2020-09-25 00:03:31,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff3e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:03:31, skipping insertion in model container [2020-09-25 00:03:31,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:03:30" (2/3) ... [2020-09-25 00:03:31,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff3e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:03:31, skipping insertion in model container [2020-09-25 00:03:31,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:03:31" (3/3) ... [2020-09-25 00:03:31,536 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-09-25 00:03:31,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:03:31,561 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:03:31,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:03:31,623 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:03:31,624 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:03:31,624 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:03:31,624 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:03:31,624 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:03:31,625 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:03:31,625 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:03:31,625 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:03:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-25 00:03:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:03:31,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:31,672 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] [2020-09-25 00:03:31,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-09-25 00:03:31,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:31,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290161394] [2020-09-25 00:03:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:31,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:32,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 00:03:32,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:32,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-09-25 00:03:32,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-25 00:03:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:03:32,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:32,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:32,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:32,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:32,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 00:03:32,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:32,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:32,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:32,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:32,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:32,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:32,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:32,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:32,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:03:32,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:32,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:32,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290161394] [2020-09-25 00:03:32,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:03:32,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:03:32,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575420380] [2020-09-25 00:03:32,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:03:32,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:03:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:03:32,348 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-09-25 00:03:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:32,534 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-09-25 00:03:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:03:32,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 00:03:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:32,554 INFO L225 Difference]: With dead ends: 113 [2020-09-25 00:03:32,555 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 00:03:32,560 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 [2020-09-25 00:03:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 00:03:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 00:03:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 00:03:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 00:03:32,615 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-09-25 00:03:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:32,615 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 00:03:32,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:03:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 00:03:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:03:32,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:32,617 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] [2020-09-25 00:03:32,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:03:32,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-09-25 00:03:32,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:32,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974176734] [2020-09-25 00:03:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:33,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 00:03:33,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:03:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-09-25 00:03:33,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:03:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:03:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:33,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:33,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:33,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:03:33,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:33,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:33,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:33,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:33,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:33,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:33,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:33,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 00:03:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:33,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974176734] [2020-09-25 00:03:33,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:03:33,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:03:33,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283705604] [2020-09-25 00:03:33,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:03:33,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:03:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:03:33,161 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-09-25 00:03:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:33,339 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-09-25 00:03:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:03:33,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 00:03:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:33,342 INFO L225 Difference]: With dead ends: 80 [2020-09-25 00:03:33,342 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 00:03:33,343 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 [2020-09-25 00:03:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 00:03:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-25 00:03:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 00:03:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-25 00:03:33,354 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-09-25 00:03:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:33,354 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-25 00:03:33,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:03:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-25 00:03:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 00:03:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:33,357 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] [2020-09-25 00:03:33,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:03:33,357 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-09-25 00:03:33,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617514087] [2020-09-25 00:03:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:35,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:36,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:36,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:38,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:38,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:38,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 00:03:38,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:03:38,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-09-25 00:03:38,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:38,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:03:38,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:03:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 00:03:38,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:03:39,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:03:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:39,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:39,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:03:39,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:03:39,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:03:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:03:39,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:03:39,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-25 00:03:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:03:39,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:03:39,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:03:39,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:03:39,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:03:39,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:03:39,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:03:39,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:03:39,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:03:39,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:03:39,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:03:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:03:39,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617514087] [2020-09-25 00:03:39,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:03:39,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:03:39,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945719787] [2020-09-25 00:03:39,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:03:39,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:03:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:03:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:03:39,293 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states. [2020-09-25 00:03:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:03:40,925 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-09-25 00:03:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 00:03:40,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-09-25 00:03:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:03:40,937 INFO L225 Difference]: With dead ends: 107 [2020-09-25 00:03:40,937 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 00:03:40,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 00:03:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 00:03:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-09-25 00:03:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 00:03:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-25 00:03:40,960 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48 [2020-09-25 00:03:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:03:40,961 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-25 00:03:40,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:03:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-25 00:03:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 00:03:40,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:03:40,965 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] [2020-09-25 00:03:40,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:03:40,966 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:03:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:03:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times [2020-09-25 00:03:40,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:03:40,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309999318] [2020-09-25 00:03:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:03:40,991 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-25 00:03:40,992 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-25 00:03:40,992 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:03:41,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:03:41,045 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-25 00:03:41,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:03:41 BoogieIcfgContainer [2020-09-25 00:03:41,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:03:41,053 INFO L168 Benchmark]: Toolchain (without parser) took 10395.60 ms. Allocated memory was 140.5 MB in the beginning and 305.1 MB in the end (delta: 164.6 MB). Free memory was 102.3 MB in the beginning and 205.5 MB in the end (delta: -103.2 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,054 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.64 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,057 INFO L168 Benchmark]: Boogie Preprocessor took 121.32 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 180.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,060 INFO L168 Benchmark]: RCFGBuilder took 404.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,061 INFO L168 Benchmark]: TraceAbstraction took 9517.92 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 161.3 MB in the beginning and 205.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:03:41,068 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 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.64 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.32 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 180.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 161.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9517.92 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 161.3 MB in the beginning and 205.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 57.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i