/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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:12:32,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:12:32,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:12:32,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:12:32,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:12:32,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:12:32,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:12:32,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:12:32,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:12:32,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:12:32,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:12:32,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:12:32,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:12:32,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:12:32,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:12:32,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:12:32,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:12:32,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:12:32,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:12:32,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:12:32,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:12:32,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:12:32,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:12:32,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:12:32,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:12:32,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:12:32,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:12:32,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:12:32,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:12:32,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:12:32,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:12:32,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:12:32,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:12:32,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:12:32,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:12:32,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:12:32,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:12:32,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:12:32,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:12:32,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:12:32,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:12:32,506 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 [2020-10-14 05:12:32,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:12:32,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:12:32,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:12:32,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:12:32,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:12:32,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:12:32,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:12:32,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:12:32,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:12:32,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:12:32,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:12:32,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:12:32,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:12:32,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:12:32,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:12:32,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:12:32,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:12:32,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:12:32,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:12:32,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:12:32,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:12:32,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:12:32,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:12:32,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:12:32,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:12:32,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:12:32,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:12:32,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:12:32,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:12:32,552 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 -> SequenceOfStatements 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:12:32,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:12:32,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:12:32,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:12:32,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:12:32,868 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:12:32,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-2.c [2020-10-14 05:12:32,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b68dfd263/e208f1ebfe5844338437aed6a0a24623/FLAGb21fe15a9 [2020-10-14 05:12:33,371 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:12:33,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_14-2.c [2020-10-14 05:12:33,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b68dfd263/e208f1ebfe5844338437aed6a0a24623/FLAGb21fe15a9 [2020-10-14 05:12:33,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b68dfd263/e208f1ebfe5844338437aed6a0a24623 [2020-10-14 05:12:33,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:12:33,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:12:33,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:12:33,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:12:33,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:12:33,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:12:33" (1/1) ... [2020-10-14 05:12:33,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4207e6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:33, skipping insertion in model container [2020-10-14 05:12:33,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:12:33" (1/1) ... [2020-10-14 05:12:33,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:12:33,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:12:33,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:12:33,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:12:33,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:12:34,004 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:12:34,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34 WrapperNode [2020-10-14 05:12:34,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:12:34,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:12:34,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:12:34,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:12:34,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (1/1) ... [2020-10-14 05:12:34,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:12:34,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:12:34,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:12:34,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:12:34,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (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 [2020-10-14 05:12:34,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:12:34,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:12:34,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:12:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:12:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:12:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:12:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:12:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:12:34,591 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:12:34,591 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:12:34,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:12:34 BoogieIcfgContainer [2020-10-14 05:12:34,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:12:34,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:12:34,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:12:34,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:12:34,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:12:33" (1/3) ... [2020-10-14 05:12:34,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac0a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:12:34, skipping insertion in model container [2020-10-14 05:12:34,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:34" (2/3) ... [2020-10-14 05:12:34,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac0a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:12:34, skipping insertion in model container [2020-10-14 05:12:34,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:12:34" (3/3) ... [2020-10-14 05:12:34,606 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_14-2.c [2020-10-14 05:12:34,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:12:34,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:12:34,658 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:12:34,696 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:12:34,696 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:12:34,697 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:12:34,697 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:12:34,698 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:12:34,698 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:12:34,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:12:34,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:12:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-14 05:12:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:12:34,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:12:34,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:12:34,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:12:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:12:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527455, now seen corresponding path program 1 times [2020-10-14 05:12:34,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:12:34,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180447048] [2020-10-14 05:12:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:12:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:34,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:35,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:12:35,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:12:35,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 05:12:35,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:35,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:12:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:12:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:12:35,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:12:35,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:12:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:35,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:12:35,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:35,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:12:35,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:35,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:35,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:12:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:12:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:12:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:12:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:12:35,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180447048] [2020-10-14 05:12:35,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:12:35,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:12:35,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101135362] [2020-10-14 05:12:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:12:35,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:12:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:12:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:35,424 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-14 05:12:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:12:35,521 INFO L93 Difference]: Finished difference Result 131 states and 239 transitions. [2020-10-14 05:12:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:12:35,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-14 05:12:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:12:35,535 INFO L225 Difference]: With dead ends: 131 [2020-10-14 05:12:35,536 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:12:35,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:12:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-14 05:12:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:12:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 126 transitions. [2020-10-14 05:12:35,590 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 126 transitions. Word has length 24 [2020-10-14 05:12:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:12:35,591 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 126 transitions. [2020-10-14 05:12:35,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:12:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 126 transitions. [2020-10-14 05:12:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:12:35,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:12:35,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:12:35,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:12:35,593 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:12:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:12:35,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1694520263, now seen corresponding path program 1 times [2020-10-14 05:12:35,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:12:35,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658406168] [2020-10-14 05:12:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:12:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:35,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:12:35,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:35,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 05:12:35,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:35,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:12:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:12:35,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:12:35,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:12:35,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:12:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:35,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:12:35,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:12:35,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:35,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:35,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:12:35,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:12:35,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:12:35,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:12:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:12:35,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658406168] [2020-10-14 05:12:35,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:12:35,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:12:35,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56941161] [2020-10-14 05:12:35,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:12:35,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:12:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:12:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:35,805 INFO L87 Difference]: Start difference. First operand 70 states and 126 transitions. Second operand 3 states. [2020-10-14 05:12:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:12:35,855 INFO L93 Difference]: Finished difference Result 133 states and 242 transitions. [2020-10-14 05:12:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:12:35,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-14 05:12:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:12:35,863 INFO L225 Difference]: With dead ends: 133 [2020-10-14 05:12:35,863 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:12:35,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:12:35,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2020-10-14 05:12:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:12:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 183 transitions. [2020-10-14 05:12:35,897 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 183 transitions. Word has length 24 [2020-10-14 05:12:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:12:35,898 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 183 transitions. [2020-10-14 05:12:35,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:12:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 183 transitions. [2020-10-14 05:12:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:12:35,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:12:35,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:12:35,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:12:35,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:12:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:12:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash 673459101, now seen corresponding path program 1 times [2020-10-14 05:12:35,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:12:35,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674377719] [2020-10-14 05:12:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:12:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:35,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:35,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:12:35,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:35,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 05:12:35,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:35,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:12:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:12:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:12:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:12:36,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:12:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:36,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:36,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:12:36,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:36,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:12:36,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:36,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:12:36,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:12:36,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:12:36,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:12:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:12:36,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674377719] [2020-10-14 05:12:36,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:12:36,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:12:36,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796181747] [2020-10-14 05:12:36,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:12:36,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:12:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:12:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:36,030 INFO L87 Difference]: Start difference. First operand 100 states and 183 transitions. Second operand 3 states. [2020-10-14 05:12:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:12:36,057 INFO L93 Difference]: Finished difference Result 194 states and 356 transitions. [2020-10-14 05:12:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:12:36,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-14 05:12:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:12:36,060 INFO L225 Difference]: With dead ends: 194 [2020-10-14 05:12:36,060 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 05:12:36,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 05:12:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-14 05:12:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:12:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 237 transitions. [2020-10-14 05:12:36,077 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 237 transitions. Word has length 24 [2020-10-14 05:12:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:12:36,078 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 237 transitions. [2020-10-14 05:12:36,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:12:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 237 transitions. [2020-10-14 05:12:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:12:36,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:12:36,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:12:36,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:12:36,080 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:12:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:12:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash 106172361, now seen corresponding path program 1 times [2020-10-14 05:12:36,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:12:36,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080438659] [2020-10-14 05:12:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:12:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:36,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:36,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:12:36,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 05:12:36,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:36,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:12:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:12:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:12:36,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:12:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:12:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:12:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:12:36,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:12:36,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:12:36,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:12:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:12:36,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:12:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:12:36,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080438659] [2020-10-14 05:12:36,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:12:36,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:12:36,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475524843] [2020-10-14 05:12:36,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:12:36,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:12:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:12:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:36,167 INFO L87 Difference]: Start difference. First operand 130 states and 237 transitions. Second operand 3 states. [2020-10-14 05:12:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:12:36,191 INFO L93 Difference]: Finished difference Result 179 states and 322 transitions. [2020-10-14 05:12:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:12:36,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-14 05:12:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:12:36,193 INFO L225 Difference]: With dead ends: 179 [2020-10-14 05:12:36,193 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:12:36,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:12:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:12:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-14 05:12:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 05:12:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 230 transitions. [2020-10-14 05:12:36,215 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 230 transitions. Word has length 24 [2020-10-14 05:12:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:12:36,215 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 230 transitions. [2020-10-14 05:12:36,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:12:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 230 transitions. [2020-10-14 05:12:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:12:36,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:12:36,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:12:36,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:12:36,218 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:12:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:12:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash -914888801, now seen corresponding path program 1 times [2020-10-14 05:12:36,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:12:36,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498382169] [2020-10-14 05:12:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:12:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:12:36,247 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:12:36,247 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:12:36,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:12:36,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:12:36 BoogieIcfgContainer [2020-10-14 05:12:36,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:12:36,280 INFO L168 Benchmark]: Toolchain (without parser) took 2565.44 ms. Allocated memory was 146.3 MB in the beginning and 234.4 MB in the end (delta: 88.1 MB). Free memory was 102.6 MB in the beginning and 153.0 MB in the end (delta: -50.4 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,281 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.92 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 91.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,283 INFO L168 Benchmark]: Boogie Preprocessor took 150.47 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 91.1 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,284 INFO L168 Benchmark]: RCFGBuilder took 439.44 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 157.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,285 INFO L168 Benchmark]: TraceAbstraction took 1679.66 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 156.7 MB in the beginning and 153.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:12:36,289 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.92 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 91.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.47 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 91.1 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.44 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 157.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1679.66 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 156.7 MB in the beginning and 153.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 217]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L6] int p1 = __VERIFIER_nondet_int(); [L7] int lk1; [L9] int p2 = __VERIFIER_nondet_int(); [L10] int lk2; [L12] int p3 = __VERIFIER_nondet_int(); [L13] int lk3; [L15] int p4 = __VERIFIER_nondet_int(); [L16] int lk4; [L18] int p5 = __VERIFIER_nondet_int(); [L19] int lk5; [L21] int p6 = __VERIFIER_nondet_int(); [L22] int lk6; [L24] int p7 = __VERIFIER_nondet_int(); [L25] int lk7; [L27] int p8 = __VERIFIER_nondet_int(); [L28] int lk8; [L30] int p9 = __VERIFIER_nondet_int(); [L31] int lk9; [L33] int p10 = __VERIFIER_nondet_int(); [L34] int lk10; [L36] int p11 = __VERIFIER_nondet_int(); [L37] int lk11; [L39] int p12 = __VERIFIER_nondet_int(); [L40] int lk12; [L42] int p13 = __VERIFIER_nondet_int(); [L43] int lk13; [L45] int p14 = __VERIFIER_nondet_int(); [L46] int lk14; [L49] int cond; [L51] COND TRUE 1 [L52] cond = __VERIFIER_nondet_int() [L53] COND FALSE !(cond == 0) [L56] lk1 = 0 [L58] lk2 = 0 [L60] lk3 = 0 [L62] lk4 = 0 [L64] lk5 = 0 [L66] lk6 = 0 [L68] lk7 = 0 [L70] lk8 = 0 [L72] lk9 = 0 [L74] lk10 = 0 [L76] lk11 = 0 [L78] lk12 = 0 [L80] lk13 = 0 [L82] lk14 = 0 [L86] COND FALSE !(p1 != 0) [L90] COND FALSE !(p2 != 0) [L94] COND TRUE p3 != 0 [L95] lk3 = 1 [L98] COND TRUE p4 != 0 [L99] lk4 = 1 [L102] COND TRUE p5 != 0 [L103] lk5 = 1 [L106] COND TRUE p6 != 0 [L107] lk6 = 1 [L110] COND TRUE p7 != 0 [L111] lk7 = 1 [L114] COND FALSE !(p8 != 0) [L118] COND TRUE p9 != 0 [L119] lk9 = 1 [L122] COND TRUE p10 != 0 [L123] lk10 = 1 [L126] COND TRUE p11 != 0 [L127] lk11 = 1 [L130] COND TRUE p12 != 0 [L131] lk12 = 1 [L134] COND TRUE p13 != 0 [L135] lk13 = 1 [L138] COND TRUE p14 != 0 [L139] lk14 = 1 [L144] COND FALSE !(p1 != 0) [L149] COND FALSE !(p2 != 0) [L217] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 282 SDslu, 301 SDs, 0 SdLazy, 21 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred 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, 4 MinimizatonAttempts, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 5382 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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...