/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:31:19,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:19,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:19,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:19,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:19,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:19,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:19,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:19,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:19,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:19,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:19,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:19,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:19,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:19,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:19,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:19,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:19,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:19,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:19,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:19,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:19,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:19,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:19,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:19,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:19,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:19,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:19,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:19,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:19,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:19,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:19,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:19,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:19,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:19,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:19,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:19,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:19,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:19,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:19,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:19,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:19,109 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 12:31:19,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:19,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:19,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:19,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:19,176 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:19,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:19,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:19,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:19,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:19,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:19,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:19,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:19,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:19,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:19,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:19,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:19,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:19,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:19,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:19,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:19,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:19,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:19,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:19,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:19,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:19,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:19,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:19,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:19,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:19,183 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:19,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:19,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:19,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:19,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:19,697 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:19,698 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 12:31:19,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cf86b70b/47b2f233c2bc40ccadbf54e7be76169d/FLAGb702e1b41 [2020-09-25 12:31:20,300 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:20,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 12:31:20,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cf86b70b/47b2f233c2bc40ccadbf54e7be76169d/FLAGb702e1b41 [2020-09-25 12:31:20,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cf86b70b/47b2f233c2bc40ccadbf54e7be76169d [2020-09-25 12:31:20,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:20,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:20,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:20,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:20,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:20,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:20,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20, skipping insertion in model container [2020-09-25 12:31:20,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:20,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:20,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:20,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:20,961 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:20,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:20,996 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:20,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20 WrapperNode [2020-09-25 12:31:20,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:20,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:20,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:20,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:21,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (1/1) ... [2020-09-25 12:31:21,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:21,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:21,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:21,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:21,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (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 12:31:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:31:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:21,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:21,455 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:21,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:21 BoogieIcfgContainer [2020-09-25 12:31:21,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:21,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:21,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:21,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:21,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:20" (1/3) ... [2020-09-25 12:31:21,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79872a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:21, skipping insertion in model container [2020-09-25 12:31:21,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:20" (2/3) ... [2020-09-25 12:31:21,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79872a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:21, skipping insertion in model container [2020-09-25 12:31:21,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:21" (3/3) ... [2020-09-25 12:31:21,492 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 12:31:21,516 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:21,526 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:21,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:21,583 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:21,583 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:21,583 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:21,583 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:21,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:21,584 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:21,584 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:21,584 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 12:31:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 12:31:21,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:21,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:21,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 12:31:21,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:21,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500720027] [2020-09-25 12:31:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:21,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:21,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:31:21,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:21,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-25 12:31:21,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:21,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:21,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:21,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 12:31:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:21,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:21,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:21,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:21,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:21,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:21,985 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 12:31:21,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500720027] [2020-09-25 12:31:21,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:21,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:21,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971030132] [2020-09-25 12:31:21,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:21,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:22,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:22,017 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-09-25 12:31:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:22,131 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-09-25 12:31:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:31:22,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 12:31:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:22,147 INFO L225 Difference]: With dead ends: 70 [2020-09-25 12:31:22,148 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 12:31:22,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:31:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 12:31:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 12:31:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 12:31:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 12:31:22,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 12:31:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:22,206 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 12:31:22,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 12:31:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 12:31:22,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:22,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:22,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:22,209 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 12:31:22,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:22,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491235366] [2020-09-25 12:31:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:22,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:22,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:31:22,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-25 12:31:22,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:22,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:31:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:31:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:22,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:22,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:22,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:22,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:22,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:22,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:22,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:22,456 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 12:31:22,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491235366] [2020-09-25 12:31:22,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:22,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 12:31:22,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332215135] [2020-09-25 12:31:22,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 12:31:22,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 12:31:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:31:22,460 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 12:31:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:22,561 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 12:31:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 12:31:22,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 12:31:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:22,564 INFO L225 Difference]: With dead ends: 42 [2020-09-25 12:31:22,564 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 12:31:22,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:31:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 12:31:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 12:31:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 12:31:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 12:31:22,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 12:31:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:22,578 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 12:31:22,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 12:31:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 12:31:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 12:31:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:22,580 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:31:22,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:22,580 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 12:31:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:22,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581257029] [2020-09-25 12:31:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:23,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:23,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 12:31:23,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-09-25 12:31:23,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:23,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:23,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:31:23,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:23,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:23,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:23,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:23,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:23,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:23,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:23,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:23,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:23,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:23,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:23,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 12:31:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:23,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:23,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:23,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 12:31:23,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:23,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 12:31:23,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:23,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:23,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:23,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 12:31:23,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:23,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581257029] [2020-09-25 12:31:23,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:23,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 12:31:23,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126068] [2020-09-25 12:31:23,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:31:23,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:31:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:31:23,421 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 12:31:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:23,622 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 12:31:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 12:31:23,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 12:31:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:23,624 INFO L225 Difference]: With dead ends: 46 [2020-09-25 12:31:23,624 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 12:31:23,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:31:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 12:31:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-25 12:31:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 12:31:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 12:31:23,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-25 12:31:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:23,634 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 12:31:23,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:31:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 12:31:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 12:31:23,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:23,636 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 12:31:23,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:23,637 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 12:31:23,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:23,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959195341] [2020-09-25 12:31:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:31:23,650 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:31:23,651 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:31:23,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:23,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:23 BoogieIcfgContainer [2020-09-25 12:31:23,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:23,680 INFO L168 Benchmark]: Toolchain (without parser) took 3016.36 ms. Allocated memory was 145.8 MB in the beginning and 234.9 MB in the end (delta: 89.1 MB). Free memory was 100.7 MB in the beginning and 147.1 MB in the end (delta: -46.4 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,681 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.62 ms. Allocated memory is still 145.8 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,683 INFO L168 Benchmark]: Boogie Preprocessor took 128.56 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 182.3 MB in the end (delta: -91.6 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,684 INFO L168 Benchmark]: RCFGBuilder took 348.16 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 167.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,685 INFO L168 Benchmark]: TraceAbstraction took 2199.37 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.6 MB in the beginning and 147.1 MB in the end (delta: 19.5 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:23,689 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.62 ms. Allocated memory is still 145.8 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.56 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 182.3 MB in the end (delta: -91.6 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.16 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 167.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2199.37 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 166.6 MB in the beginning and 147.1 MB in the end (delta: 19.5 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i