/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=DEEPEST --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-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:08:35,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:08:35,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:08:35,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:08:35,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:08:35,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:08:35,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:08:35,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:08:35,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:08:35,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:08:35,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:08:35,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:08:35,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:08:35,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:08:35,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:08:35,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:08:35,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:08:35,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:08:35,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:08:35,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:08:35,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:08:35,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:08:35,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:08:35,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:08:35,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:08:35,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:08:35,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:08:35,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:08:35,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:08:35,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:08:35,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:08:35,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:08:35,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:08:35,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:08:35,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:08:35,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:08:35,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:08:35,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:08:35,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:08:35,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:08:35,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:08:35,186 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 01:08:35,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:08:35,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:08:35,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:08:35,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:08:35,214 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:08:35,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:08:35,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:08:35,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:08:35,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:08:35,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:08:35,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:08:35,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:08:35,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:08:35,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:08:35,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:08:35,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:08:35,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:08:35,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:08:35,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:08:35,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:08:35,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:08:35,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:08:35,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:08:35,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:08:35,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:08:35,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:08:35,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:08:35,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:08:35,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:08:35,220 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:08:35,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:08:35,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:08:35,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:08:35,744 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:08:35,744 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:08:35,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-25 01:08:35,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3db299f0f/a48c38c60a8f4098bae93e649c32945f/FLAG66d0b55c9 [2020-09-25 01:08:36,394 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:08:36,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-25 01:08:36,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3db299f0f/a48c38c60a8f4098bae93e649c32945f/FLAG66d0b55c9 [2020-09-25 01:08:36,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3db299f0f/a48c38c60a8f4098bae93e649c32945f [2020-09-25 01:08:36,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:08:36,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:08:36,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:36,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:08:36,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:08:36,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:36" (1/1) ... [2020-09-25 01:08:36,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f546c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:36, skipping insertion in model container [2020-09-25 01:08:36,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:36" (1/1) ... [2020-09-25 01:08:36,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:08:36,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:08:37,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:37,075 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:08:37,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:37,122 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:08:37,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37 WrapperNode [2020-09-25 01:08:37,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:37,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:08:37,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:08:37,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:08:37,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:08:37,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:08:37,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:08:37,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:08:37,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (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 01:08:37,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:08:37,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:08:37,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:08:37,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:08:37,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:08:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:08:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:08:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:08:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:08:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:08:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 01:08:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:08:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 01:08:37,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 01:08:37,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 01:08:37,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:08:37,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:08:37,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:08:37,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:08:37,737 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 01:08:37,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:37 BoogieIcfgContainer [2020-09-25 01:08:37,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:08:37,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:08:37,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:08:37,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:08:37,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:08:36" (1/3) ... [2020-09-25 01:08:37,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e317553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:37, skipping insertion in model container [2020-09-25 01:08:37,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (2/3) ... [2020-09-25 01:08:37,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e317553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:37, skipping insertion in model container [2020-09-25 01:08:37,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:37" (3/3) ... [2020-09-25 01:08:37,751 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-09-25 01:08:37,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:08:37,772 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:08:37,793 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:08:37,822 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:08:37,823 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:08:37,823 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:08:37,823 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:08:37,823 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:08:37,823 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:08:37,823 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:08:37,823 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:08:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 01:08:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 01:08:37,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:37,854 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] [2020-09-25 01:08:37,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1270765896, now seen corresponding path program 1 times [2020-09-25 01:08:37,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:37,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034017318] [2020-09-25 01:08:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:39,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 01:08:39,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 01:08:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1330 [2020-09-25 01:08:39,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 01:08:39,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 01:08:39,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 01:08:39,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 01:08:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:39,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:39,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:39,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 01:08:39,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:39,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:39,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 01:08:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:39,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:39,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:08:39,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:39,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 01:08:39,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:39,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 01:08:39,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:39,836 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 01:08:39,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034017318] [2020-09-25 01:08:39,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:39,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 01:08:39,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284970265] [2020-09-25 01:08:39,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 01:08:39,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 01:08:39,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:08:39,885 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 9 states. [2020-09-25 01:08:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:40,635 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2020-09-25 01:08:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:08:40,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-25 01:08:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:40,654 INFO L225 Difference]: With dead ends: 141 [2020-09-25 01:08:40,655 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:08:40,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:08:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:08:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-09-25 01:08:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 01:08:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-25 01:08:40,729 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 33 [2020-09-25 01:08:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:40,730 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-25 01:08:40,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 01:08:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-25 01:08:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 01:08:40,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:40,733 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] [2020-09-25 01:08:40,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:08:40,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1006539825, now seen corresponding path program 1 times [2020-09-25 01:08:40,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:40,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347384717] [2020-09-25 01:08:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:40,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:41,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 01:08:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:41,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-09-25 01:08:41,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 01:08:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 01:08:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:41,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:41,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:41,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:08:41,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:41,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:41,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 01:08:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:41,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:41,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:08:41,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:41,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 01:08:41,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:08:41,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:41,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 01:08:41,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:08:41,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347384717] [2020-09-25 01:08:41,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:41,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 01:08:41,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383525630] [2020-09-25 01:08:41,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:08:41,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:08:41,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:08:41,500 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 6 states. [2020-09-25 01:08:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:41,812 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-25 01:08:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:08:41,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-25 01:08:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:41,814 INFO L225 Difference]: With dead ends: 121 [2020-09-25 01:08:41,814 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 01:08:41,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:08:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 01:08:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-09-25 01:08:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 01:08:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-09-25 01:08:41,826 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 43 [2020-09-25 01:08:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:41,827 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-09-25 01:08:41,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:08:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-09-25 01:08:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 01:08:41,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:41,829 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, 1, 1] [2020-09-25 01:08:41,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:08:41,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1492535423, now seen corresponding path program 1 times [2020-09-25 01:08:41,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:41,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169771336] [2020-09-25 01:08:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:41,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:42,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 01:08:44,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 01:08:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2912 [2020-09-25 01:08:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 01:08:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 01:08:44,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:44,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:44,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:08:44,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:44,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:44,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-25 01:08:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 01:08:44,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 01:08:44,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 01:08:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:08:44,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169771336] [2020-09-25 01:08:44,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:44,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:08:44,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101988918] [2020-09-25 01:08:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:08:44,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:08:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:08:44,968 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 8 states. [2020-09-25 01:08:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:45,311 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-09-25 01:08:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 01:08:45,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-25 01:08:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:45,313 INFO L225 Difference]: With dead ends: 115 [2020-09-25 01:08:45,313 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 01:08:45,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:08:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 01:08:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-25 01:08:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 01:08:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-25 01:08:45,324 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 50 [2020-09-25 01:08:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:45,324 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-25 01:08:45,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:08:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-25 01:08:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 01:08:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:45,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 01:08:45,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:08:45,327 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -153041457, now seen corresponding path program 2 times [2020-09-25 01:08:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107834037] [2020-09-25 01:08:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:08:45,360 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:08:45,361 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:08:45,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:08:45,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:08:45 BoogieIcfgContainer [2020-09-25 01:08:45,395 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:08:45,399 INFO L168 Benchmark]: Toolchain (without parser) took 8663.12 ms. Allocated memory was 138.9 MB in the beginning and 282.1 MB in the end (delta: 143.1 MB). Free memory was 102.1 MB in the beginning and 216.2 MB in the end (delta: -114.2 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,400 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.15 ms. Allocated memory is still 138.9 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,402 INFO L168 Benchmark]: Boogie Preprocessor took 158.49 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,403 INFO L168 Benchmark]: RCFGBuilder took 458.48 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 159.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,404 INFO L168 Benchmark]: TraceAbstraction took 7651.71 ms. Allocated memory was 201.9 MB in the beginning and 282.1 MB in the end (delta: 80.2 MB). Free memory was 159.1 MB in the beginning and 216.2 MB in the end (delta: -57.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:08:45,409 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 383.15 ms. Allocated memory is still 138.9 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.49 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 458.48 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 159.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7651.71 ms. Allocated memory was 201.9 MB in the beginning and 282.1 MB in the end (delta: 80.2 MB). Free memory was 159.1 MB in the beginning and 216.2 MB in the end (delta: -57.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND FALSE !(i < SIZE) [L27] COND FALSE !(SIZE % 2 != 0) [L29] CALL assume_abort_if_not(SIZE % 2 == 0) [L4] COND FALSE !(!cond) [L29] RET assume_abort_if_not(SIZE % 2 == 0) [L30] i = 1 [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] [L36] COND FALSE !(a[2*i-1] > i) [L30] i++ [L30] COND FALSE !(i <= SIZE/2) [L42] i = 0 [L42] COND TRUE i < SIZE [L44] EXPR a[i] [L44] CALL __VERIFIER_assert( a[i] <= i ) [L6] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 156 SDtfs, 243 SDslu, 378 SDs, 0 SdLazy, 643 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 40 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 123 ConstructedInterpolants, 0 QuantifiedInterpolants, 12260 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...