/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=NARROWEST --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/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:11:52,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:11:52,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:11:52,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:11:52,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:11:52,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:11:52,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:11:52,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:11:52,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:11:52,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:11:52,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:11:52,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:11:52,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:11:52,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:11:52,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:11:52,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:11:52,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:11:52,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:11:52,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:11:52,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:11:52,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:11:52,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:11:52,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:11:52,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:11:52,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:11:52,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:11:52,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:11:52,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:11:52,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:11:52,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:11:52,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:11:52,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:11:52,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:11:52,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:11:52,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:11:52,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:11:52,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:11:52,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:11:52,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:11:52,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:11:52,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:11:52,716 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 [2020-10-13 11:11:52,738 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:11:52,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:11:52,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:11:52,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:11:52,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:11:52,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:11:52,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:11:52,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:11:52,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:11:52,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:11:52,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:11:52,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:11:52,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:11:52,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:11:52,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:11:52,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:11:52,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:11:52,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:11:52,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:11:52,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:11:52,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:11:52,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:11:52,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:11:52,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:11:52,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:11:52,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:11:52,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:11:52,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:11:52,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:11:52,745 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:11:53,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:11:53,078 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:11:53,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:11:53,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:11:53,084 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:11:53,084 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-13 11:11:53,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f0b18d4/0c95ee6157334d738b9f736d31935659/FLAG20ed04faf [2020-10-13 11:11:53,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:11:53,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-13 11:11:53,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f0b18d4/0c95ee6157334d738b9f736d31935659/FLAG20ed04faf [2020-10-13 11:11:54,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65f0b18d4/0c95ee6157334d738b9f736d31935659 [2020-10-13 11:11:54,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:11:54,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:11:54,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:54,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:11:54,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:11:54,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54, skipping insertion in model container [2020-10-13 11:11:54,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:11:54,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:11:54,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:54,287 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:11:54,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:54,321 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:11:54,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54 WrapperNode [2020-10-13 11:11:54,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:54,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:11:54,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:11:54,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:11:54,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (1/1) ... [2020-10-13 11:11:54,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:11:54,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:11:54,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:11:54,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:11:54,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (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 [2020-10-13 11:11:54,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:11:54,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:11:54,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 11:11:54,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:11:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:11:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:11:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 11:11:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 11:11:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 11:11:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:11:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:11:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:11:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:11:54,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:11:54,729 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:11:54,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:54 BoogieIcfgContainer [2020-10-13 11:11:54,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:11:54,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:11:54,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:11:54,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:11:54,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:11:54" (1/3) ... [2020-10-13 11:11:54,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313b573e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:54, skipping insertion in model container [2020-10-13 11:11:54,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:54" (2/3) ... [2020-10-13 11:11:54,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313b573e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:54, skipping insertion in model container [2020-10-13 11:11:54,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:54" (3/3) ... [2020-10-13 11:11:54,743 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2020-10-13 11:11:54,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:11:54,765 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:11:54,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:11:54,863 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:11:54,863 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:11:54,863 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:11:54,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:11:54,864 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:11:54,864 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:11:54,864 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:11:54,864 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:11:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 11:11:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 11:11:54,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:54,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:54,896 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1709960313, now seen corresponding path program 1 times [2020-10-13 11:11:54,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:54,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125828253] [2020-10-13 11:11:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:11:55,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:11:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 11:11:55,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 11:11:55,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:11:55,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:11:55,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:55,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:11:55,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 11:11:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:11:55,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:55,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 11:11:55,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 11:11:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:55,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:55,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:55,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:11:55,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:11:55,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 11:11:55,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:11:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:11:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:11:55,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125828253] [2020-10-13 11:11:55,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:55,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 11:11:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715252410] [2020-10-13 11:11:55,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 11:11:55,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:55,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 11:11:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:11:55,267 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-13 11:11:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:55,301 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-13 11:11:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 11:11:55,304 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-10-13 11:11:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:55,316 INFO L225 Difference]: With dead ends: 60 [2020-10-13 11:11:55,316 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 11:11:55,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:11:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 11:11:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 11:11:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 11:11:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-13 11:11:55,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-13 11:11:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:55,377 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-13 11:11:55,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 11:11:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-13 11:11:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 11:11:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:55,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:55,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:11:55,381 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1380569729, now seen corresponding path program 1 times [2020-10-13 11:11:55,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:55,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810522668] [2020-10-13 11:11:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:55,403 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-13 11:11:55,404 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-13 11:11:55,404 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 11:11:55,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:11:55,427 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-13 11:11:55,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:11:55 BoogieIcfgContainer [2020-10-13 11:11:55,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 11:11:55,431 INFO L168 Benchmark]: Toolchain (without parser) took 1402.13 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.8 MB in the beginning and 134.3 MB in the end (delta: -29.5 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,432 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.96 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 94.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,435 INFO L168 Benchmark]: Boogie Preprocessor took 119.13 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 182.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,436 INFO L168 Benchmark]: RCFGBuilder took 291.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 168.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,437 INFO L168 Benchmark]: TraceAbstraction took 693.02 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 134.3 MB in the end (delta: 33.5 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:55,441 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.96 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 94.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.13 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 182.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 168.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 693.02 ms. Allocated memory is still 204.5 MB. Free memory was 167.8 MB in the beginning and 134.3 MB in the end (delta: 33.5 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int a, b, p, q, r, s; [L18] int x, y; [L19] x = __VERIFIER_nondet_int() [L20] y = __VERIFIER_nondet_int() [L21] CALL assume_abort_if_not(x >= 1) [L6] COND FALSE !(!cond) [L21] RET assume_abort_if_not(x >= 1) [L22] CALL assume_abort_if_not(y >= 1) [L6] COND FALSE !(!cond) [L22] RET assume_abort_if_not(y >= 1) [L24] a = x [L25] b = y [L26] p = 1 [L27] q = 0 [L28] r = 0 [L29] s = 1 [L31] COND TRUE 1 [L32] CALL __VERIFIER_assert(1 == p * s - r * q) [L9] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 0.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...