/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:21,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:21,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:21,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:21,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:21,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:21,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:21,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:21,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:21,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:21,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:21,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:21,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:21,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:21,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:21,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:21,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:21,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:21,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:21,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:21,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:21,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:21,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:21,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:21,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:54:21,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:54:21,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:54:21,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:54:21,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:54:21,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:54:21,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:54:21,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:54:21,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:54:21,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:54:21,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:54:21,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:54:21,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:54:21,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:54:21,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:21,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:21,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:21,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:54:21,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:21,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:21,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:21,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:21,869 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:21,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:21,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:21,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:21,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:21,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:21,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:21,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:21,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:21,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:21,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:21,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:21,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:21,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:21,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:21,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:21,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:21,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:21,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:21,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:21,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:21,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:21,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:21,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:21,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:21,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:22,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:22,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:22,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:22,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:22,496 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:22,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 14:54:22,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/741acb9b6/1257f8eeb2294bdd88cef5dd43838e8d/FLAGbc2be919f [2020-09-24 14:54:23,170 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:23,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 14:54:23,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/741acb9b6/1257f8eeb2294bdd88cef5dd43838e8d/FLAGbc2be919f [2020-09-24 14:54:23,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/741acb9b6/1257f8eeb2294bdd88cef5dd43838e8d [2020-09-24 14:54:23,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:23,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:23,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:23,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:23,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:23,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:23, skipping insertion in model container [2020-09-24 14:54:23,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:23,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:23,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:23,867 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:23,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:24,011 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:24,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24 WrapperNode [2020-09-24 14:54:24,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:24,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:24,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:24,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:24,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:24,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:24,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 14:54:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 14:54:24,136 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 14:54:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 14:54:24,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:54:24,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 14:54:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 14:54:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 14:54:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 14:54:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 14:54:24,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:24,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:24,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:24,655 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:24,655 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 14:54:24,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:24 BoogieIcfgContainer [2020-09-24 14:54:24,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:24,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:24,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:24,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:24,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:23" (1/3) ... [2020-09-24 14:54:24,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b101c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:24, skipping insertion in model container [2020-09-24 14:54:24,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (2/3) ... [2020-09-24 14:54:24,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b101c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:24, skipping insertion in model container [2020-09-24 14:54:24,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:24" (3/3) ... [2020-09-24 14:54:24,672 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-09-24 14:54:24,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:24,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:24,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:24,749 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:24,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:24,749 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:24,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:24,749 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:24,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:24,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:24,750 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-09-24 14:54:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 14:54:24,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:24,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:24,792 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:24,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1377121462, now seen corresponding path program 1 times [2020-09-24 14:54:24,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:24,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641415204] [2020-09-24 14:54:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 14:54:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 14:54:25,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641415204] [2020-09-24 14:54:25,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:25,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:54:25,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22804871] [2020-09-24 14:54:25,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:25,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:25,333 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 8 states. [2020-09-24 14:54:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:25,572 INFO L93 Difference]: Finished difference Result 259 states and 324 transitions. [2020-09-24 14:54:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:54:25,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-09-24 14:54:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:25,594 INFO L225 Difference]: With dead ends: 259 [2020-09-24 14:54:25,595 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 14:54:25,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 14:54:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2020-09-24 14:54:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 14:54:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-09-24 14:54:25,693 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 81 [2020-09-24 14:54:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:25,694 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-09-24 14:54:25,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-09-24 14:54:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 14:54:25,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:25,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:25,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:25,700 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1823732666, now seen corresponding path program 1 times [2020-09-24 14:54:25,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:25,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048461185] [2020-09-24 14:54:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 14:54:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 14:54:26,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048461185] [2020-09-24 14:54:26,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:26,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64531079] [2020-09-24 14:54:26,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:26,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:26,178 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 13 states. [2020-09-24 14:54:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,552 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-09-24 14:54:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:54:26,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-09-24 14:54:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,558 INFO L225 Difference]: With dead ends: 277 [2020-09-24 14:54:26,558 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 14:54:26,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 14:54:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2020-09-24 14:54:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-24 14:54:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 220 transitions. [2020-09-24 14:54:26,587 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 220 transitions. Word has length 85 [2020-09-24 14:54:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,588 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 220 transitions. [2020-09-24 14:54:26,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 220 transitions. [2020-09-24 14:54:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 14:54:26,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:26,597 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash -955036012, now seen corresponding path program 1 times [2020-09-24 14:54:26,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896489451] [2020-09-24 14:54:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 14:54:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 14:54:26,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896489451] [2020-09-24 14:54:26,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:54:26,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006506337] [2020-09-24 14:54:26,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:54:26,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:54:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:26,920 INFO L87 Difference]: Start difference. First operand 188 states and 220 transitions. Second operand 9 states. [2020-09-24 14:54:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,175 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2020-09-24 14:54:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:27,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-09-24 14:54:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,183 INFO L225 Difference]: With dead ends: 336 [2020-09-24 14:54:27,183 INFO L226 Difference]: Without dead ends: 277 [2020-09-24 14:54:27,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-24 14:54:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2020-09-24 14:54:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-09-24 14:54:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2020-09-24 14:54:27,243 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 86 [2020-09-24 14:54:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,244 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2020-09-24 14:54:27,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:54:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2020-09-24 14:54:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 14:54:27,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:27,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash 808883757, now seen corresponding path program 1 times [2020-09-24 14:54:27,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066965336] [2020-09-24 14:54:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 14:54:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 14:54:27,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066965336] [2020-09-24 14:54:27,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:27,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754616239] [2020-09-24 14:54:27,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:27,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:27,508 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand 10 states. [2020-09-24 14:54:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,721 INFO L93 Difference]: Finished difference Result 333 states and 385 transitions. [2020-09-24 14:54:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:27,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-09-24 14:54:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,724 INFO L225 Difference]: With dead ends: 333 [2020-09-24 14:54:27,725 INFO L226 Difference]: Without dead ends: 224 [2020-09-24 14:54:27,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-24 14:54:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2020-09-24 14:54:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-24 14:54:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2020-09-24 14:54:27,739 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 88 [2020-09-24 14:54:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,740 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2020-09-24 14:54:27,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2020-09-24 14:54:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 14:54:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:27,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1795206334, now seen corresponding path program 2 times [2020-09-24 14:54:27,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575145284] [2020-09-24 14:54:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 14:54:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 14:54:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 14:54:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 14:54:28,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575145284] [2020-09-24 14:54:28,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:28,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 14:54:28,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643738885] [2020-09-24 14:54:28,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:28,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:28,294 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand 15 states. [2020-09-24 14:54:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,036 INFO L93 Difference]: Finished difference Result 328 states and 385 transitions. [2020-09-24 14:54:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:29,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-09-24 14:54:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,041 INFO L225 Difference]: With dead ends: 328 [2020-09-24 14:54:29,043 INFO L226 Difference]: Without dead ends: 269 [2020-09-24 14:54:29,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-24 14:54:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2020-09-24 14:54:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-09-24 14:54:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 275 transitions. [2020-09-24 14:54:29,073 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 275 transitions. Word has length 89 [2020-09-24 14:54:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,073 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 275 transitions. [2020-09-24 14:54:29,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 275 transitions. [2020-09-24 14:54:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 14:54:29,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:29,076 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1839352304, now seen corresponding path program 1 times [2020-09-24 14:54:29,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619578986] [2020-09-24 14:54:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:54:29,114 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:54:29,114 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:54:29,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:29,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:29 BoogieIcfgContainer [2020-09-24 14:54:29,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:29,155 INFO L168 Benchmark]: Toolchain (without parser) took 5643.28 ms. Allocated memory was 137.9 MB in the beginning and 251.7 MB in the end (delta: 113.8 MB). Free memory was 100.8 MB in the beginning and 102.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 111.9 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,156 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.26 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 100.0 MB in the beginning and 176.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,158 INFO L168 Benchmark]: Boogie Preprocessor took 49.65 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,158 INFO L168 Benchmark]: RCFGBuilder took 599.49 ms. Allocated memory is still 199.8 MB. Free memory was 174.8 MB in the beginning and 143.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,159 INFO L168 Benchmark]: TraceAbstraction took 4488.27 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 142.5 MB in the beginning and 102.7 MB in the end (delta: 39.7 MB). Peak memory consumption was 91.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:29,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 493.26 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 100.0 MB in the beginning and 176.8 MB in the end (delta: -76.9 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.65 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 599.49 ms. Allocated memory is still 199.8 MB. Free memory was 174.8 MB in the beginning and 143.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4488.27 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 142.5 MB in the beginning and 102.7 MB in the end (delta: 39.7 MB). Peak memory consumption was 91.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 103, overapproximation of bitwiseAnd at line 101. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; [L231] CALL, EXPR base2flt(0, 0) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND TRUE ! m [L20] __retres4 = 0U [L70] return (__retres4); [L231] RET, EXPR base2flt(0, 0) [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND TRUE m >= 1U << 25U [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U [L70] return (__retres4); [L232] RET, EXPR base2flt(ma, ea) [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND FALSE !(m >= 1U << 25U) [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res [L70] return (__retres4); [L233] RET, EXPR base2flt(mb, eb) [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; [L84] COND FALSE !(a < b) [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) [L104] CALL __VERIFIER_assert(ea >= eb) [L6] COND TRUE !(cond) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 169 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 828 SDtfs, 418 SDslu, 7246 SDs, 0 SdLazy, 763 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 152 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 141004 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 122/131 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...