/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 [2020-07-20 10:45:36,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:36,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:36,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:36,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:36,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:36,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:36,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:36,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:36,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:36,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:36,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:36,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:36,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:36,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:36,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:36,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:36,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:36,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:36,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:36,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:36,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:36,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:36,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:36,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:36,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:36,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:36,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:36,852 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 [2020-07-20 10:45:36,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:36,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:36,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:36,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:36,869 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:36,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:36,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:36,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:36,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:36,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:36,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:36,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:36,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:36,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:36,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:36,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:36,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:36,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:36,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:36,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:36,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:36,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:36,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:36,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:36,874 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:37,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:37,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:37,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:37,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:37,185 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:37,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 10:45:37,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e3e1e8f/0000fed9b8c4476fb8f84948079e11b3/FLAGad8cd2afd [2020-07-20 10:45:37,717 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:37,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-07-20 10:45:37,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e3e1e8f/0000fed9b8c4476fb8f84948079e11b3/FLAGad8cd2afd [2020-07-20 10:45:38,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e3e1e8f/0000fed9b8c4476fb8f84948079e11b3 [2020-07-20 10:45:38,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:38,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:38,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:38,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:38,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:38,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51efcf94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38, skipping insertion in model container [2020-07-20 10:45:38,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:38,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:38,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:38,395 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:38,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:38,567 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:38,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38 WrapperNode [2020-07-20 10:45:38,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:38,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:38,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:38,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:38,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (1/1) ... [2020-07-20 10:45:38,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:38,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:38,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:38,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:38,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (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 [2020-07-20 10:45:38,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:38,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:38,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 10:45:38,675 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 10:45:38,675 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 10:45:38,676 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 10:45:38,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 10:45:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 10:45:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 10:45:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 10:45:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 10:45:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 10:45:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:39,523 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:39,523 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 10:45:39,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:39 BoogieIcfgContainer [2020-07-20 10:45:39,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:39,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:39,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:39,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:39,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:38" (1/3) ... [2020-07-20 10:45:39,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4275c605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:39, skipping insertion in model container [2020-07-20 10:45:39,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38" (2/3) ... [2020-07-20 10:45:39,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4275c605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:39, skipping insertion in model container [2020-07-20 10:45:39,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:39" (3/3) ... [2020-07-20 10:45:39,536 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-07-20 10:45:39,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:39,557 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:39,572 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:39,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:39,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:39,600 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:39,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:39,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:39,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:39,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:39,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:39,623 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-07-20 10:45:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 10:45:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:39,633 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] [2020-07-20 10:45:39,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-07-20 10:45:39,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:39,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837391873] [2020-07-20 10:45:39,651 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 [2020-07-20 10:45:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:45:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:39,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:39,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837391873] [2020-07-20 10:45:39,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:39,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 10:45:39,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300278732] [2020-07-20 10:45:39,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:39,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:39,920 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 8 states. [2020-07-20 10:45:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:40,096 INFO L93 Difference]: Finished difference Result 131 states and 196 transitions. [2020-07-20 10:45:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:40,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-20 10:45:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:40,114 INFO L225 Difference]: With dead ends: 131 [2020-07-20 10:45:40,115 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 10:45:40,120 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 [2020-07-20 10:45:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 10:45:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-07-20 10:45:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 10:45:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-07-20 10:45:40,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 34 [2020-07-20 10:45:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:40,185 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-07-20 10:45:40,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-07-20 10:45:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 10:45:40,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:40,189 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] [2020-07-20 10:45:40,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:40,404 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash 837286191, now seen corresponding path program 1 times [2020-07-20 10:45:40,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:40,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180879092] [2020-07-20 10:45:40,406 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 [2020-07-20 10:45:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:40,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:40,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180879092] [2020-07-20 10:45:40,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:40,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-20 10:45:40,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514400341] [2020-07-20 10:45:40,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 10:45:40,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 10:45:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:45:40,832 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states. [2020-07-20 10:45:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,070 INFO L93 Difference]: Finished difference Result 124 states and 164 transitions. [2020-07-20 10:45:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:45:41,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-07-20 10:45:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,076 INFO L225 Difference]: With dead ends: 124 [2020-07-20 10:45:41,076 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 10:45:41,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:45:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 10:45:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-07-20 10:45:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 10:45:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2020-07-20 10:45:41,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 38 [2020-07-20 10:45:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,121 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2020-07-20 10:45:41,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 10:45:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2020-07-20 10:45:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:45:41,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,127 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] [2020-07-20 10:45:41,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:41,328 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-07-20 10:45:41,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859177997] [2020-07-20 10:45:41,329 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 [2020-07-20 10:45:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:41,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:41,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859177997] [2020-07-20 10:45:41,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:41,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 10:45:41,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666896192] [2020-07-20 10:45:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:45:41,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:45:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:45:41,458 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 9 states. [2020-07-20 10:45:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,634 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2020-07-20 10:45:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:45:41,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-20 10:45:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,639 INFO L225 Difference]: With dead ends: 123 [2020-07-20 10:45:41,639 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 10:45:41,642 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 [2020-07-20 10:45:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 10:45:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-07-20 10:45:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 10:45:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2020-07-20 10:45:41,660 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 42 [2020-07-20 10:45:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,661 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2020-07-20 10:45:41,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:45:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2020-07-20 10:45:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:45:41,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,664 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] [2020-07-20 10:45:41,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:41,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-07-20 10:45:41,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522691523] [2020-07-20 10:45:41,879 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 [2020-07-20 10:45:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:42,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:42,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522691523] [2020-07-20 10:45:42,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:42,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 10:45:42,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871691104] [2020-07-20 10:45:42,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:45:42,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:45:42,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:45:42,030 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand 9 states. [2020-07-20 10:45:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:42,217 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2020-07-20 10:45:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:45:42,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-07-20 10:45:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:42,220 INFO L225 Difference]: With dead ends: 117 [2020-07-20 10:45:42,221 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 10:45:42,222 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 [2020-07-20 10:45:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 10:45:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-20 10:45:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 10:45:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-07-20 10:45:42,233 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 42 [2020-07-20 10:45:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:42,234 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-07-20 10:45:42,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:45:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-07-20 10:45:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:45:42,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:42,246 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] [2020-07-20 10:45:42,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:42,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 2 times [2020-07-20 10:45:42,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:42,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451457310] [2020-07-20 10:45:42,461 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 [2020-07-20 10:45:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 10:45:42,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:42,648 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:45:42,653 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:45:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 10:45:42,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:42,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451457310] [2020-07-20 10:45:42,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:42,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-20 10:45:42,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993617690] [2020-07-20 10:45:42,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:45:42,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:45:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:45:42,688 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 13 states. [2020-07-20 10:45:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:43,019 INFO L93 Difference]: Finished difference Result 156 states and 214 transitions. [2020-07-20 10:45:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:45:43,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-07-20 10:45:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:43,022 INFO L225 Difference]: With dead ends: 156 [2020-07-20 10:45:43,022 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 10:45:43,023 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 [2020-07-20 10:45:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 10:45:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2020-07-20 10:45:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-20 10:45:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2020-07-20 10:45:43,040 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 42 [2020-07-20 10:45:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:43,041 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2020-07-20 10:45:43,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:45:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2020-07-20 10:45:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:45:43,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:43,043 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] [2020-07-20 10:45:43,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,257 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1947506722, now seen corresponding path program 1 times [2020-07-20 10:45:43,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964989811] [2020-07-20 10:45:43,260 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 [2020-07-20 10:45:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 10:45:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:44,601 WARN L838 $PredicateComparison]: unable to prove that (forall ((addflt_~b Int)) (<= (mod addflt_~b 4294967296) (mod c_addflt_~a 4294967296))) is different from false [2020-07-20 10:45:46,568 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 10:45:50,041 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 10:45:50,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964989811] [2020-07-20 10:45:50,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:45:50,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 10:45:50,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738638636] [2020-07-20 10:45:50,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:50,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=71, Unknown=2, NotChecked=16, Total=110 [2020-07-20 10:45:50,050 INFO L87 Difference]: Start difference. First operand 110 states and 146 transitions. Second operand 8 states. [2020-07-20 10:45:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:50,227 INFO L93 Difference]: Finished difference Result 187 states and 250 transitions. [2020-07-20 10:45:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:50,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-20 10:45:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:50,231 INFO L225 Difference]: With dead ends: 187 [2020-07-20 10:45:50,232 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 10:45:50,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=30, Invalid=104, Unknown=2, NotChecked=20, Total=156 [2020-07-20 10:45:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 10:45:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2020-07-20 10:45:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 10:45:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 10:45:50,272 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 42 [2020-07-20 10:45:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:50,273 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 10:45:50,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 10:45:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 10:45:50,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:50,275 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] [2020-07-20 10:45:50,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:50,477 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:50,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-07-20 10:45:50,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:50,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146867840] [2020-07-20 10:45:50,479 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 [2020-07-20 10:45:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:50,528 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:50,562 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:50,587 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:50,588 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:50,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:50,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:50 BoogieIcfgContainer [2020-07-20 10:45:50,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:50,832 INFO L168 Benchmark]: Toolchain (without parser) took 12701.70 ms. Allocated memory was 140.5 MB in the beginning and 247.5 MB in the end (delta: 107.0 MB). Free memory was 100.9 MB in the beginning and 219.3 MB in the end (delta: -118.3 MB). Peak memory consumption was 112.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,833 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.01 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 100.7 MB in the beginning and 181.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,835 INFO L168 Benchmark]: Boogie Preprocessor took 44.14 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,836 INFO L168 Benchmark]: RCFGBuilder took 914.75 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 154.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,837 INFO L168 Benchmark]: TraceAbstraction took 11301.49 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 154.3 MB in the beginning and 219.3 MB in the end (delta: -65.0 MB). Peak memory consumption was 103.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:50,841 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.01 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 100.7 MB in the beginning and 181.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.14 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 914.75 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 154.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11301.49 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 154.3 MB in the beginning and 219.3 MB in the end (delta: -65.0 MB). Peak memory consumption was 103.8 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=33554431] [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=33554431] [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=33554431, zero=0] [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554431] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=127, \old(m)=33554431, __retres4=4294967295, e=127, res=4294967295] [L70] return (__retres4); VAL [\old(e)=127, \old(m)=33554431, \result=-2702159776422297601, __retres4=4294967295, e=127, res=4294967295] [L233] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-2702159776422297601, ea=127, eb=127, ma=33554432, mb=33554431, zero=0] [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [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)=4294967295, a=4294967295, b=4294967295] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [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)=4294967295, a=4294967295, b=4294967295, 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: 11.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.3s, 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, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 304 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 7.5s 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, 7.5s 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...