/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:57,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:57,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:57,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:57,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:57,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:57,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:57,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:57,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:57,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:57,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:57,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:57,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:57,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:57,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:57,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:57,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:57,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:57,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:57,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:57,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:57,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:57,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:57,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:57,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:57,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:57,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:57,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:57,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:57,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:57,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:57,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:57,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:57,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:57,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:57,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:57,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:57,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:57,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:57,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:57,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:57,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 01:09:57,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:57,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:57,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:57,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:57,682 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:57,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:57,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:57,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:57,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:57,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:57,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:57,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:57,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:57,686 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:57,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:57,686 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:57,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:57,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:57,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:57,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:57,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:57,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:57,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:57,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:57,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:57,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:57,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:57,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:57,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:57,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 01:09:58,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:58,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:58,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:58,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:58,219 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:58,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-09-25 01:09:58,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86d99d71b/51aff358db1043469f543a8aa1d2608f/FLAG9e4758852 [2020-09-25 01:09:58,801 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:58,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-2.c [2020-09-25 01:09:58,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86d99d71b/51aff358db1043469f543a8aa1d2608f/FLAG9e4758852 [2020-09-25 01:09:59,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86d99d71b/51aff358db1043469f543a8aa1d2608f [2020-09-25 01:09:59,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:59,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:59,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:59,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:59,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:59,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782f63b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59, skipping insertion in model container [2020-09-25 01:09:59,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:59,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:59,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:59,754 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:59,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:59,797 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:59,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59 WrapperNode [2020-09-25 01:09:59,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:59,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:59,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:59,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:59,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... [2020-09-25 01:09:59,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:59,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:59,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:59,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:59,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:10:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:10:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:10:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:10:00,071 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-09-25 01:10:00,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:10:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:10:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:10:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 01:10:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:10:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-09-25 01:10:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:10:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:10:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:10:00,334 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:10:00,334 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:10:00,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:10:00 BoogieIcfgContainer [2020-09-25 01:10:00,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:10:00,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:10:00,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:10:00,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:10:00,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:59" (1/3) ... [2020-09-25 01:10:00,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bc2d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:10:00, skipping insertion in model container [2020-09-25 01:10:00,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:59" (2/3) ... [2020-09-25 01:10:00,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bc2d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:10:00, skipping insertion in model container [2020-09-25 01:10:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:10:00" (3/3) ... [2020-09-25 01:10:00,391 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-09-25 01:10:00,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:10:00,416 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:10:00,462 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:10:00,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:10:00,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:10:00,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:10:00,491 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:10:00,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:10:00,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:10:00,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:10:00,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:10:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 01:10:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-25 01:10:00,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:10:00,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:10:00,520 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:10:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:10:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1010422485, now seen corresponding path program 1 times [2020-09-25 01:10:00,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:10:00,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037546138] [2020-09-25 01:10:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:10:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:00,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:00,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 01:10:00,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:10:00,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-25 01:10:00,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:00,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:10:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:10:00,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:10:00,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:10:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:10:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:10:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:10:00,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:10:00,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 01:10:00,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:10:00,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:10:00,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:10:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:10:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:10:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:10:00,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:10:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:10:00,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037546138] [2020-09-25 01:10:00,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:10:00,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:10:00,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105563090] [2020-09-25 01:10:00,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:10:00,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:10:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:10:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:10:00,887 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-25 01:10:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:10:00,967 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-09-25 01:10:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:10:00,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-25 01:10:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:10:00,984 INFO L225 Difference]: With dead ends: 41 [2020-09-25 01:10:00,985 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 01:10:00,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:10:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 01:10:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-25 01:10:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:10:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-25 01:10:01,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-09-25 01:10:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:10:01,038 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-25 01:10:01,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:10:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-25 01:10:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-25 01:10:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:10:01,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:10:01,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:10:01,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:10:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:10:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 997493191, now seen corresponding path program 1 times [2020-09-25 01:10:01,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:10:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398290878] [2020-09-25 01:10:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:10:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:10:01,059 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:10:01,059 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:10:01,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:10:01,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:10:01 BoogieIcfgContainer [2020-09-25 01:10:01,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:10:01,089 INFO L168 Benchmark]: Toolchain (without parser) took 1880.93 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 140.3 MB in the end (delta: -36.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-25 01:10:01,090 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 01:10:01,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.43 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:10:01,093 INFO L168 Benchmark]: Boogie Preprocessor took 169.89 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 182.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:10:01,094 INFO L168 Benchmark]: RCFGBuilder took 387.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 169.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:10:01,095 INFO L168 Benchmark]: TraceAbstraction took 721.54 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 140.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-09-25 01:10:01,101 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 376.43 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.89 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.5 MB in the beginning and 182.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.70 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 169.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 721.54 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 140.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) [L26] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 7 SDslu, 14 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 168 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...