/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/bitvector/gcd_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:28:00,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:28:00,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:28:00,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:28:00,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:28:00,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:28:00,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:28:00,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:28:00,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:28:00,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:28:00,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:28:00,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:28:00,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:28:00,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:28:00,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:28:01,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:28:01,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:28:01,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:28:01,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:28:01,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:28:01,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:28:01,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:28:01,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:28:01,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:28:01,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:28:01,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:28:01,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:28:01,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:28:01,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:28:01,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:28:01,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:28:01,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:28:01,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:28:01,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:28:01,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:28:01,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:28:01,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:28:01,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:28:01,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:28:01,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:28:01,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:28:01,047 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 05:28:01,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:28:01,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:28:01,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:28:01,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:28:01,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:28:01,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:28:01,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:28:01,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:28:01,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:28:01,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:28:01,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:28:01,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:28:01,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:28:01,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:28:01,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:28:01,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:28:01,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:28:01,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:28:01,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:28:01,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:28:01,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:28:01,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:28:01,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:28:01,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:28:01,086 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 05:28:01,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:28:01,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:28:01,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:28:01,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:28:01,393 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:28:01,394 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_2.c [2020-10-13 05:28:01,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0087cd793/134c4532145a4624b23c61e7c0e3056c/FLAG7fa7b3067 [2020-10-13 05:28:01,886 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:28:01,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_2.c [2020-10-13 05:28:01,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0087cd793/134c4532145a4624b23c61e7c0e3056c/FLAG7fa7b3067 [2020-10-13 05:28:02,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0087cd793/134c4532145a4624b23c61e7c0e3056c [2020-10-13 05:28:02,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:28:02,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:28:02,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:28:02,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:28:02,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:28:02,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02, skipping insertion in model container [2020-10-13 05:28:02,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:28:02,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:28:02,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:28:02,554 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:28:02,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:28:02,581 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:28:02,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02 WrapperNode [2020-10-13 05:28:02,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:28:02,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:28:02,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:28:02,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:28:02,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (1/1) ... [2020-10-13 05:28:02,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:28:02,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:28:02,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:28:02,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:28:02,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (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 05:28:02,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:28:02,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:28:02,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:28:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-10-13 05:28:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:28:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:28:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 05:28:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:28:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-10-13 05:28:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:28:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:28:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:28:02,927 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:28:02,927 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 05:28:02,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:28:02 BoogieIcfgContainer [2020-10-13 05:28:02,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:28:02,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:28:02,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:28:02,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:28:02,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:28:02" (1/3) ... [2020-10-13 05:28:02,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf2722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:28:02, skipping insertion in model container [2020-10-13 05:28:02,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:28:02" (2/3) ... [2020-10-13 05:28:02,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf2722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:28:02, skipping insertion in model container [2020-10-13 05:28:02,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:28:02" (3/3) ... [2020-10-13 05:28:02,943 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_2.c [2020-10-13 05:28:02,959 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:28:02,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:28:02,986 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:28:03,014 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:28:03,014 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:28:03,014 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:28:03,014 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:28:03,015 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:28:03,015 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:28:03,015 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:28:03,015 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:28:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 05:28:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:03,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:03,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:03,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 578872383, now seen corresponding path program 1 times [2020-10-13 05:28:03,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:03,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144518290] [2020-10-13 05:28:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:03,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-13 05:28:03,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:28:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:28:03,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:03,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:03,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:03,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:28:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:03,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 05:28:03,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 05:28:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:03,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144518290] [2020-10-13 05:28:03,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:03,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 05:28:03,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670357912] [2020-10-13 05:28:03,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 05:28:03,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:03,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 05:28:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 05:28:03,535 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-10-13 05:28:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:03,558 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-13 05:28:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 05:28:03,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-13 05:28:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:03,569 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:28:03,569 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:28:03,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 05:28:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:28:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:28:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:28:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 05:28:03,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2020-10-13 05:28:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:03,624 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 05:28:03,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 05:28:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 05:28:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:03,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:03,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:03,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:28:03,626 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:03,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1364926403, now seen corresponding path program 1 times [2020-10-13 05:28:03,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:03,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56216811] [2020-10-13 05:28:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:03,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:03,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-13 05:28:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:28:03,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:28:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:03,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:03,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:03,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:03,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:03,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:03,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:03,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:03,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:03,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:03,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 05:28:03,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:03,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:28:03,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 05:28:03,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:28:03,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:04,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56216811] [2020-10-13 05:28:04,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:04,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:28:04,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414944314] [2020-10-13 05:28:04,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:28:04,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:28:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:28:04,088 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-13 05:28:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:04,198 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 05:28:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:28:04,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 05:28:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:04,199 INFO L225 Difference]: With dead ends: 31 [2020-10-13 05:28:04,200 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 05:28:04,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:28:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 05:28:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 05:28:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:28:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 05:28:04,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-10-13 05:28:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:04,207 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 05:28:04,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:28:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 05:28:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:28:04,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:04,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:04,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:28:04,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2065990981, now seen corresponding path program 1 times [2020-10-13 05:28:04,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:04,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750328634] [2020-10-13 05:28:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:04,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:04,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:28:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 05:28:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:28:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:28:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:04,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:04,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:28:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:04,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:04,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:04,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:04,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 05:28:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:04,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:04,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 05:28:04,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:04,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 05:28:04,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:04,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:28:04,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:04,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:28:04,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:04,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750328634] [2020-10-13 05:28:04,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:28:04,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:28:04,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210150391] [2020-10-13 05:28:04,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:28:04,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:28:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:28:04,296 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 05:28:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:04,343 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-13 05:28:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:28:04,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 05:28:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:04,344 INFO L225 Difference]: With dead ends: 32 [2020-10-13 05:28:04,345 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 05:28:04,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:28:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 05:28:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 05:28:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:28:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 05:28:04,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-10-13 05:28:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:04,351 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 05:28:04,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:28:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 05:28:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:28:04,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:04,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:04,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:28:04,352 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash -41516072, now seen corresponding path program 1 times [2020-10-13 05:28:04,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:04,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970923786] [2020-10-13 05:28:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:04,360 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-13 05:28:04,361 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-13 05:28:04,361 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 05:28:04,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:28:04,380 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-13 05:28:04,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:28:04 BoogieIcfgContainer [2020-10-13 05:28:04,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 05:28:04,383 INFO L168 Benchmark]: Toolchain (without parser) took 2079.76 ms. Allocated memory was 142.1 MB in the beginning and 232.3 MB in the end (delta: 90.2 MB). Free memory was 105.0 MB in the beginning and 165.6 MB in the end (delta: -60.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:04,384 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 05:28:04,385 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.75 ms. Allocated memory is still 142.1 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:04,386 INFO L168 Benchmark]: Boogie Preprocessor took 106.11 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 94.6 MB in the beginning and 181.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:04,387 INFO L168 Benchmark]: RCFGBuilder took 246.52 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:04,388 INFO L168 Benchmark]: TraceAbstraction took 1444.64 ms. Allocated memory was 202.9 MB in the beginning and 232.3 MB in the end (delta: 29.4 MB). Free memory was 167.9 MB in the beginning and 165.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2020-10-13 05:28:04,392 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.75 ms. Allocated memory is still 142.1 MB. Free memory was 104.7 MB in the beginning and 94.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.11 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 94.6 MB in the beginning and 181.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.52 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1444.64 ms. Allocated memory was 202.9 MB in the beginning and 232.3 MB in the end (delta: 29.4 MB). Free memory was 167.9 MB in the beginning and 165.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: 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: [L28] signed char x = __VERIFIER_nondet_char(); [L29] signed char y = __VERIFIER_nondet_char(); [L30] signed char g; [L32] CALL, EXPR gcd_test(x, y) [L12] signed char t; [L14] COND FALSE !(a < (signed char)0) [L15] COND TRUE b < (signed char)0 [L15] b = -b [L17] COND TRUE b != (signed char)0 [L18] t = b [L19] b = a % b [L20] a = t [L17] COND FALSE !(b != (signed char)0) [L22] return a; [L32] RET, EXPR gcd_test(x, y) [L32] g = gcd_test(x, y) [L34] COND TRUE y > (signed char)0 [L35] CALL __VERIFIER_assert(y >= g) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 17 SDslu, 85 SDs, 0 SdLazy, 44 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2574 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...