/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -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-d623d84 [2020-07-21 10:40:22,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:22,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:22,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:22,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:22,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:22,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:22,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:22,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:22,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:22,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:22,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:22,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:22,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:22,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:22,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:22,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:22,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:22,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:22,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:22,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:22,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:22,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:22,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:22,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:22,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:22,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:22,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:22,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:23,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:23,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:23,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:23,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:23,027 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:23,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:23,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:23,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:23,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:23,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:23,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:23,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:23,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:23,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:23,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:23,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:23,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:23,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:23,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:23,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:23,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:23,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:23,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:23,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:23,037 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:23,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:23,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:23,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:23,372 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:23,372 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:23,373 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 10:40:23,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0445f3/597550a33b1d40788123e3bec75f6cfa/FLAG33978d583 [2020-07-21 10:40:23,906 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:23,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-21 10:40:23,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0445f3/597550a33b1d40788123e3bec75f6cfa/FLAG33978d583 [2020-07-21 10:40:24,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0445f3/597550a33b1d40788123e3bec75f6cfa [2020-07-21 10:40:24,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:24,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:24,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:24,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:24,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:24,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5164c09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24, skipping insertion in model container [2020-07-21 10:40:24,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:24,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:24,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,664 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:24,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,857 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:24,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24 WrapperNode [2020-07-21 10:40:24,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:24,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:24,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:24,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:24,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:24,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:24,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 10:40:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 10:40:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 10:40:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 10:40:24,972 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 10:40:24,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:24,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:24,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 10:40:24,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 10:40:24,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:24,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:25,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:25,466 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 10:40:25,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25 BoogieIcfgContainer [2020-07-21 10:40:25,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:25,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:25,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:25,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:25,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:24" (1/3) ... [2020-07-21 10:40:25,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c17344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (2/3) ... [2020-07-21 10:40:25,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c17344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25" (3/3) ... [2020-07-21 10:40:25,486 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-21 10:40:25,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:25,503 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:25,518 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:25,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:25,544 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:25,544 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:25,544 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:25,544 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:25,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:25,545 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:25,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-21 10:40:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 10:40:25,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:25,571 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 10:40:25,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-21 10:40:25,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:25,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57240109] [2020-07-21 10:40:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:25,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:25,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57240109] [2020-07-21 10:40:25,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:25,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 10:40:25,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675268841] [2020-07-21 10:40:25,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:25,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:25,834 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 8 states. [2020-07-21 10:40:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:25,982 INFO L93 Difference]: Finished difference Result 131 states and 196 transitions. [2020-07-21 10:40:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:25,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-21 10:40:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:25,998 INFO L225 Difference]: With dead ends: 131 [2020-07-21 10:40:25,998 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 10:40:26,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 10:40:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-07-21 10:40:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:40:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-07-21 10:40:26,062 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 34 [2020-07-21 10:40:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,063 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-07-21 10:40:26,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-07-21 10:40:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 10:40:26,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-07-21 10:40:26,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash 837286191, now seen corresponding path program 1 times [2020-07-21 10:40:26,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:26,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816239835] [2020-07-21 10:40:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:26,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:26,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816239835] [2020-07-21 10:40:26,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:26,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 10:40:26,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874784466] [2020-07-21 10:40:26,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:40:26,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:26,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:40:26,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:40:26,662 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states. [2020-07-21 10:40:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:26,882 INFO L93 Difference]: Finished difference Result 124 states and 164 transitions. [2020-07-21 10:40:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:40:26,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-07-21 10:40:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:26,886 INFO L225 Difference]: With dead ends: 124 [2020-07-21 10:40:26,886 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 10:40:26,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:40:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 10:40:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-07-21 10:40:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 10:40:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2020-07-21 10:40:26,905 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 38 [2020-07-21 10:40:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,906 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2020-07-21 10:40:26,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:40:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2020-07-21 10:40:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:26,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,908 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-07-21 10:40:27,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,123 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-21 10:40:27,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663284402] [2020-07-21 10:40:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:27,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663284402] [2020-07-21 10:40:27,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 10:40:27,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514211809] [2020-07-21 10:40:27,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:40:27,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:40:27,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:27,237 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 9 states. [2020-07-21 10:40:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,382 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2020-07-21 10:40:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:27,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-21 10:40:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,385 INFO L225 Difference]: With dead ends: 123 [2020-07-21 10:40:27,385 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 10:40:27,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:40:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 10:40:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-07-21 10:40:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 10:40:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2020-07-21 10:40:27,405 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 42 [2020-07-21 10:40:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,406 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2020-07-21 10:40:27,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:40:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2020-07-21 10:40:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:27,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,409 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 10:40:27,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-07-21 10:40:27,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722123441] [2020-07-21 10:40:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:27,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722123441] [2020-07-21 10:40:27,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 10:40:27,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303156497] [2020-07-21 10:40:27,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:40:27,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:40:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:27,755 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand 9 states. [2020-07-21 10:40:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,914 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-07-21 10:40:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:40:27,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-21 10:40:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,917 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:40:27,917 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 10:40:27,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 10:40:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-21 10:40:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 10:40:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-07-21 10:40:27,930 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 42 [2020-07-21 10:40:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,931 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-07-21 10:40:27,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:40:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-07-21 10:40:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:27,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-07-21 10:40:28,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,146 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 2 times [2020-07-21 10:40:28,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633838532] [2020-07-21 10:40:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:28,317 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:40:28,321 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 10:40:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:40:28,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:28,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633838532] [2020-07-21 10:40:28,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:28,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 10:40:28,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136806715] [2020-07-21 10:40:28,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:40:28,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:40:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:28,352 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 13 states. [2020-07-21 10:40:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:28,666 INFO L93 Difference]: Finished difference Result 156 states and 214 transitions. [2020-07-21 10:40:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:40:28,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-07-21 10:40:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:28,670 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:40:28,671 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 10:40:28,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 10:40:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2020-07-21 10:40:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 10:40:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2020-07-21 10:40:28,716 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 42 [2020-07-21 10:40:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:28,717 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2020-07-21 10:40:28,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:40:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2020-07-21 10:40:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:28,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:28,722 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 10:40:28,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,924 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1947506722, now seen corresponding path program 1 times [2020-07-21 10:40:28,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326311243] [2020-07-21 10:40:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:40:29,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:30,353 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 10:40:30,953 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 10:40:34,995 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 10:40:35,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326311243] [2020-07-21 10:40:35,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:40:35,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 10:40:35,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838672011] [2020-07-21 10:40:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:35,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=86, Unknown=2, NotChecked=0, Total=110 [2020-07-21 10:40:35,005 INFO L87 Difference]: Start difference. First operand 110 states and 146 transitions. Second operand 8 states. [2020-07-21 10:40:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:35,193 INFO L93 Difference]: Finished difference Result 187 states and 250 transitions. [2020-07-21 10:40:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:35,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-21 10:40:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:35,197 INFO L225 Difference]: With dead ends: 187 [2020-07-21 10:40:35,197 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 10:40:35,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2020-07-21 10:40:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 10:40:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2020-07-21 10:40:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 10:40:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-21 10:40:35,218 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 42 [2020-07-21 10:40:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:35,218 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-21 10:40:35,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-21 10:40:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:35,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:35,221 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 10:40:35,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:35,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-07-21 10:40:35,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:35,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688860887] [2020-07-21 10:40:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:35,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:35,493 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:35,515 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:35,516 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:35,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:35,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:35 BoogieIcfgContainer [2020-07-21 10:40:35,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:35,767 INFO L168 Benchmark]: Toolchain (without parser) took 11515.09 ms. Allocated memory was 140.5 MB in the beginning and 243.8 MB in the end (delta: 103.3 MB). Free memory was 105.4 MB in the beginning and 193.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,768 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 604.08 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 104.9 MB in the beginning and 182.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,769 INFO L168 Benchmark]: Boogie Preprocessor took 44.91 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,770 INFO L168 Benchmark]: RCFGBuilder took 570.65 ms. Allocated memory is still 204.5 MB. Free memory was 179.9 MB in the beginning and 156.1 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,771 INFO L168 Benchmark]: TraceAbstraction took 10288.64 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 155.4 MB in the beginning and 193.6 MB in the end (delta: -38.2 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:35,775 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 604.08 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 104.9 MB in the beginning and 182.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.91 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 570.65 ms. Allocated memory is still 204.5 MB. Free memory was 179.9 MB in the beginning and 156.1 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10288.64 ms. Allocated memory was 204.5 MB in the beginning and 243.8 MB in the end (delta: 39.3 MB). Free memory was 155.4 MB in the beginning and 193.6 MB in the end (delta: -38.2 MB). Peak memory consumption was 1.1 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 100, overapproximation of bitwiseAnd at line 98. 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 ; VAL [ea=127, eb=127, ma=33554432, mb=16777216] [L231] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L231] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=127, ma=33554432, mb=16777216] [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L232] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=127, ma=33554432, mb=16777216, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=127, \old(m)=16777216, __retres4=4278190080, e=127, res=4278190080] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=16777216, \result=-108086391073669120, __retres4=4278190080, e=127, res=4278190080] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-108086391073669120, ea=127, eb=127, ma=33554432, mb=16777216, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [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 ; VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [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) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080, ea=127, eb=2147483519] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 502 SDtfs, 225 SDslu, 3663 SDs, 0 SdLazy, 558 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 304 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=6, 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, 6 MinimizatonAttempts, 84 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 282 NumberOfCodeBlocks, 282 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 17989 SizeOfPredicates, 25 NumberOfNonLiveVariables, 748 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 109/118 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...