/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 02:00:06,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 02:00:06,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 02:00:06,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 02:00:06,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 02:00:06,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 02:00:06,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 02:00:06,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 02:00:06,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 02:00:06,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 02:00:06,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 02:00:06,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 02:00:06,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 02:00:06,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 02:00:06,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 02:00:06,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 02:00:06,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 02:00:06,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 02:00:06,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 02:00:06,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 02:00:06,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 02:00:06,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 02:00:06,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 02:00:06,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 02:00:06,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 02:00:06,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 02:00:06,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 02:00:06,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 02:00:06,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 02:00:06,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 02:00:06,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 02:00:06,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 02:00:06,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 02:00:06,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 02:00:06,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 02:00:06,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 02:00:06,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 02:00:06,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 02:00:06,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 02:00:06,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 02:00:06,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 02:00:06,689 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 [2020-10-27 02:00:06,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 02:00:06,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 02:00:06,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 02:00:06,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 02:00:06,748 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 02:00:06,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 02:00:06,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 02:00:06,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 02:00:06,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 02:00:06,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 02:00:06,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 02:00:06,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 02:00:06,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 02:00:06,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 02:00:06,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 02:00:06,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 02:00:06,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 02:00:06,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 02:00:06,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 02:00:06,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 02:00:06,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 02:00:06,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 02:00:06,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 02:00:06,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 02:00:06,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 02:00:06,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 02:00:06,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 02:00:06,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 02:00:06,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 02:00:06,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 02:00:07,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 02:00:07,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 02:00:07,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 02:00:07,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 02:00:07,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 02:00:07,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-27 02:00:07,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c43e18e74/62891a73c8e94f9590101e1f03dae67e/FLAG7f205e09e [2020-10-27 02:00:08,038 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 02:00:08,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-27 02:00:08,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c43e18e74/62891a73c8e94f9590101e1f03dae67e/FLAG7f205e09e [2020-10-27 02:00:08,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c43e18e74/62891a73c8e94f9590101e1f03dae67e [2020-10-27 02:00:08,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 02:00:08,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 02:00:08,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:08,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 02:00:08,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 02:00:08,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b33b144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08, skipping insertion in model container [2020-10-27 02:00:08,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 02:00:08,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 02:00:08,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:08,620 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 02:00:08,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:08,660 INFO L208 MainTranslator]: Completed translation [2020-10-27 02:00:08,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08 WrapperNode [2020-10-27 02:00:08,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:08,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 02:00:08,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 02:00:08,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 02:00:08,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (1/1) ... [2020-10-27 02:00:08,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 02:00:08,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 02:00:08,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 02:00:08,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 02:00:08,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (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 [2020-10-27 02:00:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 02:00:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 02:00:08,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 02:00:08,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 02:00:08,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 02:00:08,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 02:00:08,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 02:00:08,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 02:00:08,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 02:00:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 02:00:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 02:00:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 02:00:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 02:00:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 02:00:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 02:00:09,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 02:00:09,056 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 02:00:09,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:09 BoogieIcfgContainer [2020-10-27 02:00:09,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 02:00:09,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 02:00:09,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 02:00:09,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 02:00:09,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:00:08" (1/3) ... [2020-10-27 02:00:09,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7394bd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:09, skipping insertion in model container [2020-10-27 02:00:09,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:08" (2/3) ... [2020-10-27 02:00:09,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7394bd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:09, skipping insertion in model container [2020-10-27 02:00:09,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:09" (3/3) ... [2020-10-27 02:00:09,068 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd.c [2020-10-27 02:00:09,082 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 02:00:09,088 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 02:00:09,117 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 02:00:09,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 02:00:09,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 02:00:09,179 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 02:00:09,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 02:00:09,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 02:00:09,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 02:00:09,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 02:00:09,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 02:00:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 02:00:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 02:00:09,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:09,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:09,227 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:09,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1104468818, now seen corresponding path program 1 times [2020-10-27 02:00:09,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837199289] [2020-10-27 02:00:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:09,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:09,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:09,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 02:00:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 02:00:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 02:00:09,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:09,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:09,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 02:00:09,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:09,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 02:00:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 02:00:09,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:10,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 02:00:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:10,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:10,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 02:00:10,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:00:10,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 02:00:10,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:10,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:10,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 02:00:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:10,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 02:00:10,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:00:10,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 02:00:10,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:10,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 02:00:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:10,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 02:00:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 02:00:10,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837199289] [2020-10-27 02:00:10,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:10,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 02:00:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101286891] [2020-10-27 02:00:10,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 02:00:10,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 02:00:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 02:00:10,089 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 02:00:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:10,318 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2020-10-27 02:00:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 02:00:10,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-27 02:00:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:10,330 INFO L225 Difference]: With dead ends: 65 [2020-10-27 02:00:10,330 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 02:00:10,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 02:00:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 02:00:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 02:00:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 02:00:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 02:00:10,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23 [2020-10-27 02:00:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:10,389 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 02:00:10,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 02:00:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 02:00:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 02:00:10,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:10,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:10,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 02:00:10,392 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -516704694, now seen corresponding path program 1 times [2020-10-27 02:00:10,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:10,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907611004] [2020-10-27 02:00:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:10,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-27 02:00:10,414 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-27 02:00:10,414 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 02:00:10,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 02:00:10,434 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-27 02:00:10,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:00:10 BoogieIcfgContainer [2020-10-27 02:00:10,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 02:00:10,438 INFO L168 Benchmark]: Toolchain (without parser) took 2048.65 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 122.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:10,439 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 02:00:10,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.48 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:10,444 INFO L168 Benchmark]: Boogie Preprocessor took 37.91 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:10,445 INFO L168 Benchmark]: RCFGBuilder took 357.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 100.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:10,445 INFO L168 Benchmark]: TraceAbstraction took 1375.43 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 122.8 MB in the end (delta: -23.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 02:00:10,450 INFO L339 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 151.0 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.48 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.91 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.29 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 100.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1375.43 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 122.8 MB in the end (delta: -23.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: 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: [L19] int a, b, p, q, r, s; [L20] int x, y; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L23] RET assume_abort_if_not(x >= 1) [L24] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y >= 1) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND TRUE !(cond) [L13] CALL reach_error() [L4] __assert_fail("0", "egcd.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 17 SDslu, 3 SDs, 0 SdLazy, 12 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 0.5s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1144 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...