/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=BIGGEST --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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:32:46,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:32:46,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:32:46,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:32:46,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:32:46,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:32:46,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:32:46,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:32:46,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:32:46,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:32:46,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:32:46,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:32:46,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:32:46,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:32:46,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:32:46,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:32:46,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:32:46,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:32:46,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:32:46,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:32:46,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:32:46,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:32:46,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:32:46,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:32:46,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:32:46,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:32:46,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:32:46,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:32:46,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:32:46,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:32:46,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:32:46,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:32:46,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:32:46,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:32:46,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:32:46,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:32:46,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:32:46,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:32:46,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:32:46,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:32:46,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:32:46,634 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 [2020-10-12 10:32:46,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:32:46,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:32:46,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:32:46,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:32:46,656 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:32:46,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:32:46,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:32:46,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:32:46,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:32:46,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:32:46,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:32:46,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:32:46,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:32:46,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:32:46,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:32:46,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:32:46,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:32:46,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:32:46,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:32:46,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:32:46,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:32:46,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:32:46,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:32:46,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:32:46,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:32:46,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:32:46,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:32:46,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:32:46,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:32:46,660 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:32:46,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:32:46,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:32:46,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:32:46,968 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:32:46,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:32:46,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_3.c [2020-10-12 10:32:47,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/272950573/758b9d0dd45340ad8606b0a77af0535a/FLAGf0fb3f57f [2020-10-12 10:32:47,505 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:32:47,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_3.c [2020-10-12 10:32:47,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/272950573/758b9d0dd45340ad8606b0a77af0535a/FLAGf0fb3f57f [2020-10-12 10:32:47,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/272950573/758b9d0dd45340ad8606b0a77af0535a [2020-10-12 10:32:47,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:32:47,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:32:47,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:32:47,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:32:47,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:32:47,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:32:47" (1/1) ... [2020-10-12 10:32:47,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42dfe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:47, skipping insertion in model container [2020-10-12 10:32:47,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:32:47" (1/1) ... [2020-10-12 10:32:47,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:32:47,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:32:48,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:32:48,175 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:32:48,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:32:48,209 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:32:48,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48 WrapperNode [2020-10-12 10:32:48,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:32:48,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:32:48,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:32:48,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:32:48,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (1/1) ... [2020-10-12 10:32:48,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:32:48,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:32:48,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:32:48,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:32:48,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (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 [2020-10-12 10:32:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:32:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:32:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:32:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-10-12 10:32:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:32:48,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:32:48,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 10:32:48,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:32:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-10-12 10:32:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:32:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:32:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:32:48,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:32:48,606 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 10:32:48,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:32:48 BoogieIcfgContainer [2020-10-12 10:32:48,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:32:48,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:32:48,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:32:48,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:32:48,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:32:47" (1/3) ... [2020-10-12 10:32:48,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b80103c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:32:48, skipping insertion in model container [2020-10-12 10:32:48,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:32:48" (2/3) ... [2020-10-12 10:32:48,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b80103c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:32:48, skipping insertion in model container [2020-10-12 10:32:48,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:32:48" (3/3) ... [2020-10-12 10:32:48,619 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2020-10-12 10:32:48,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:32:48,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:32:48,654 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:32:48,684 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:32:48,685 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:32:48,685 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:32:48,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:32:48,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:32:48,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:32:48,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:32:48,688 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:32:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-12 10:32:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:32:48,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:48,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:48,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash 578872383, now seen corresponding path program 1 times [2020-10-12 10:32:48,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:48,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483173054] [2020-10-12 10:32:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:48,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:49,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:49,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:32:49,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:32:49,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-12 10:32:49,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:32:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:32:49,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:32:49,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:32:49,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:49,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:32:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:49,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:49,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:32:49,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 10:32:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:49,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:49,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:49,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 10:32:49,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:32:49,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-12 10:32:49,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:49,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:32:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:49,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:32:49,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:32:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:49,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483173054] [2020-10-12 10:32:49,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:32:49,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 10:32:49,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79975591] [2020-10-12 10:32:49,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:32:49,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:32:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:32:49,531 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 8 states. [2020-10-12 10:32:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:49,697 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-12 10:32:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:32:49,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 10:32:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:49,709 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:32:49,710 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 10:32:49,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:32:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 10:32:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 10:32:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 10:32:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-12 10:32:49,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-12 10:32:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:49,758 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-12 10:32:49,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:32:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-12 10:32:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:32:49,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:49,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:49,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:32:49,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1106760965, now seen corresponding path program 1 times [2020-10-12 10:32:49,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:49,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043448776] [2020-10-12 10:32:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:49,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:32:50,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:32:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-12 10:32:50,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:32:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 10:32:50,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:32:50,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:50,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:50,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:50,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:50,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:50,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:50,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:50,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 10:32:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:50,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 10:32:50,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:50,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 10:32:50,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:32:50,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:32:50,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 10:32:50,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:50,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043448776] [2020-10-12 10:32:50,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:32:50,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:32:50,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129912750] [2020-10-12 10:32:50,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:32:50,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:50,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:32:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:32:50,220 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-10-12 10:32:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:50,326 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-12 10:32:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:32:50,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-12 10:32:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:50,328 INFO L225 Difference]: With dead ends: 34 [2020-10-12 10:32:50,328 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 10:32:50,330 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 [2020-10-12 10:32:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 10:32:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-12 10:32:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 10:32:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-12 10:32:50,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-12 10:32:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:50,336 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-12 10:32:50,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:32:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-12 10:32:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 10:32:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:50,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:32:50,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:32:50,338 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1807825543, now seen corresponding path program 1 times [2020-10-12 10:32:50,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:50,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44527948] [2020-10-12 10:32:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:32:50,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 10:32:50,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:32:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:32:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:32:50,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:32:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:50,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 10:32:50,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:50,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:32:50,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:32:50,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:50,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:32:50,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 10:32:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:32:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:32:50,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:32:50,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 10:32:50,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:32:50,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 10:32:50,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:32:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:32:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:32:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:32:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:32:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:32:50,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44527948] [2020-10-12 10:32:50,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:32:50,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:32:50,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555571170] [2020-10-12 10:32:50,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:32:50,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:32:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:32:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:32:50,456 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-10-12 10:32:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:32:50,500 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-12 10:32:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:32:50,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-12 10:32:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:32:50,502 INFO L225 Difference]: With dead ends: 34 [2020-10-12 10:32:50,502 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 10:32:50,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:32:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 10:32:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 10:32:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:32:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-12 10:32:50,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-12 10:32:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:32:50,508 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-12 10:32:50,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:32:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-12 10:32:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:32:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:32:50,509 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] [2020-10-12 10:32:50,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:32:50,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:32:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:32:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash -41516072, now seen corresponding path program 1 times [2020-10-12 10:32:50,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:32:50,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770197794] [2020-10-12 10:32:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:32:50,518 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-12 10:32:50,518 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-12 10:32:50,519 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 10:32:50,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:32:50,541 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-12 10:32:50,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 10:32:50 BoogieIcfgContainer [2020-10-12 10:32:50,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 10:32:50,544 INFO L168 Benchmark]: Toolchain (without parser) took 2654.76 ms. Allocated memory was 140.5 MB in the beginning and 233.8 MB in the end (delta: 93.3 MB). Free memory was 103.7 MB in the beginning and 130.1 MB in the end (delta: -26.5 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-10-12 10:32:50,545 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 10:32:50,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-12 10:32:50,547 INFO L168 Benchmark]: Boogie Preprocessor took 110.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 182.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-12 10:32:50,548 INFO L168 Benchmark]: RCFGBuilder took 288.59 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.7 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-10-12 10:32:50,549 INFO L168 Benchmark]: TraceAbstraction took 1930.02 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 168.0 MB in the beginning and 130.1 MB in the end (delta: 37.9 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. [2020-10-12 10:32:50,553 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.00 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 182.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.59 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.7 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1930.02 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 168.0 MB in the beginning and 130.1 MB in the end (delta: 37.9 MB). Peak memory consumption was 68.3 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 x > (signed char)0 [L35] CALL __VERIFIER_assert(x >= 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: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 30 SDslu, 205 SDs, 0 SdLazy, 118 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3222 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...