/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_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:36,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:36,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:36,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:36,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:36,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:36,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:36,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:36,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:36,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:36,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:36,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:36,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:36,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:36,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:36,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:36,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:36,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:36,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:36,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:36,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:36,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:36,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:36,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:36,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:36,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:36,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:36,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:36,417 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 10:45:36,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:36,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:36,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:36,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:36,438 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:36,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:36,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:36,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:36,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:36,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:36,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:36,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:36,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:36,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:36,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:36,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:36,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:36,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:36,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:36,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:36,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:36,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:36,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:36,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:36,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:36,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:36,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:36,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:36,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:36,443 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 10:45:36,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:36,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:36,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:36,758 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:36,760 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:36,760 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 10:45:36,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d49b2b35/174922f0b7b04cf084d243574b4b3243/FLAG7365bc9ae [2020-07-20 10:45:37,332 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:37,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 10:45:37,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d49b2b35/174922f0b7b04cf084d243574b4b3243/FLAG7365bc9ae [2020-07-20 10:45:37,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d49b2b35/174922f0b7b04cf084d243574b4b3243 [2020-07-20 10:45:37,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:37,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:37,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:37,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:37,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:37,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:37" (1/1) ... [2020-07-20 10:45:37,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536291a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:37, skipping insertion in model container [2020-07-20 10:45:37,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:37" (1/1) ... [2020-07-20 10:45:37,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:37,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:37,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:37,947 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:37,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:38,098 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:38,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:38 WrapperNode [2020-07-20 10:45:38,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:38,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:38,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:38,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:38,116 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 10:45:38,118 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 10:45:38,126 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 10:45:38,126 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 10:45:38,136 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 10:45:38,143 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 10:45:38,146 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 10:45:38,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:38,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:38,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:38,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:38,151 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 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 10:45:38,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 10:45:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 10:45:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:38,719 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:38,720 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 10:45:38,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:38 BoogieIcfgContainer [2020-07-20 10:45:38,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:38,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:38,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:38,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:38,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:37" (1/3) ... [2020-07-20 10:45:38,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56af83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:38, skipping insertion in model container [2020-07-20 10:45:38,731 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 10:45:38,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56af83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:38, skipping insertion in model container [2020-07-20 10:45:38,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:38" (3/3) ... [2020-07-20 10:45:38,733 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-20 10:45:38,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:38,752 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:38,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:38,789 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:38,789 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:38,790 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:38,790 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:38,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:38,790 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:38,790 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:38,790 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 10:45:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 10:45:38,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:38,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:38,819 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 10:45:38,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:38,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498148976] [2020-07-20 10:45:38,831 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 10:45:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:38,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 10:45:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:39,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:39,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498148976] [2020-07-20 10:45:39,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:45:39,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239451355] [2020-07-20 10:45:39,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:45:39,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:45:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:39,091 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-20 10:45:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:39,163 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-20 10:45:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:45:39,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-20 10:45:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:39,176 INFO L225 Difference]: With dead ends: 118 [2020-07-20 10:45:39,177 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 10:45:39,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 10:45:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 10:45:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 10:45:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-20 10:45:39,231 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-20 10:45:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:39,233 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-20 10:45:39,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:45:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-20 10:45:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:39,237 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:39,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:39,448 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-20 10:45:39,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:39,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140106096] [2020-07-20 10:45:39,451 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 10:45:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:39,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:39,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140106096] [2020-07-20 10:45:39,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:39,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:39,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324791384] [2020-07-20 10:45:39,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:39,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:39,575 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-20 10:45:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:39,624 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-20 10:45:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:39,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-20 10:45:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:39,631 INFO L225 Difference]: With dead ends: 64 [2020-07-20 10:45:39,631 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 10:45:39,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 10:45:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 10:45:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 10:45:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-20 10:45:39,653 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-20 10:45:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:39,653 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-20 10:45:39,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-20 10:45:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:39,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:39,663 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:39,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:39,878 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-20 10:45:39,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:39,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998860443] [2020-07-20 10:45:39,880 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 10:45:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:45:39,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:40,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:40,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998860443] [2020-07-20 10:45:40,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:40,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 10:45:40,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832331023] [2020-07-20 10:45:40,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:40,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:40,045 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-20 10:45:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:40,175 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-20 10:45:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:45:40,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-20 10:45:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:40,180 INFO L225 Difference]: With dead ends: 89 [2020-07-20 10:45:40,180 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:45:40,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 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 10:45:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:45:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-20 10:45:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 10:45:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-20 10:45:40,197 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-20 10:45:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:40,198 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-20 10:45:40,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-20 10:45:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:40,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:40,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:40,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:40,413 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-20 10:45:40,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:40,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029427248] [2020-07-20 10:45:40,415 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 10:45:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:45:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:40,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:40,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029427248] [2020-07-20 10:45:40,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:45:40,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 10:45:40,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386754122] [2020-07-20 10:45:40,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:45:40,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:45:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:40,620 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-07-20 10:45:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:40,709 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2020-07-20 10:45:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:45:40,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-20 10:45:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:40,712 INFO L225 Difference]: With dead ends: 87 [2020-07-20 10:45:40,712 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 10:45:40,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 10:45:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-07-20 10:45:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 10:45:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-07-20 10:45:40,726 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 50 [2020-07-20 10:45:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:40,727 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-07-20 10:45:40,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:45:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-07-20 10:45:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 10:45:40,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:40,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:40,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:40,943 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-07-20 10:45:40,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:40,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331628240] [2020-07-20 10:45:40,946 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 10:45:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:41,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:41,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331628240] [2020-07-20 10:45:41,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:41,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:45:41,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073890383] [2020-07-20 10:45:41,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:45:41,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:45:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:41,044 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 6 states. [2020-07-20 10:45:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,085 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-20 10:45:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:41,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-20 10:45:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,087 INFO L225 Difference]: With dead ends: 85 [2020-07-20 10:45:41,087 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:45:41,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:45:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-07-20 10:45:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 10:45:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2020-07-20 10:45:41,101 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 52 [2020-07-20 10:45:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,101 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2020-07-20 10:45:41,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:45:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2020-07-20 10:45:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 10:45:41,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,104 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:41,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:41,318 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-07-20 10:45:41,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363013335] [2020-07-20 10:45:41,321 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 10:45:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:41,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:41,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363013335] [2020-07-20 10:45:41,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:41,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:45:41,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815257347] [2020-07-20 10:45:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:45:41,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:45:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:41,417 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand 6 states. [2020-07-20 10:45:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,473 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-07-20 10:45:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:41,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-20 10:45:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,481 INFO L225 Difference]: With dead ends: 96 [2020-07-20 10:45:41,481 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 10:45:41,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:45:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 10:45:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-07-20 10:45:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 10:45:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2020-07-20 10:45:41,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 52 [2020-07-20 10:45:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,504 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2020-07-20 10:45:41,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:45:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2020-07-20 10:45:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 10:45:41,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:41,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:41,708 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1437004996, now seen corresponding path program 1 times [2020-07-20 10:45:41,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162226815] [2020-07-20 10:45:41,710 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 10:45:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:41,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:41,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162226815] [2020-07-20 10:45:41,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:45:41,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 10:45:41,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737870790] [2020-07-20 10:45:41,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:45:41,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:45:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:45:41,902 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand 10 states. [2020-07-20 10:45:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:42,024 INFO L93 Difference]: Finished difference Result 162 states and 218 transitions. [2020-07-20 10:45:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:45:42,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-07-20 10:45:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:42,027 INFO L225 Difference]: With dead ends: 162 [2020-07-20 10:45:42,027 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 10:45:42,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:45:42,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 10:45:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-20 10:45:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 10:45:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-20 10:45:42,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 54 [2020-07-20 10:45:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:42,042 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-20 10:45:42,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:45:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-20 10:45:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 10:45:42,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:42,044 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:42,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:42,259 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash -649172186, now seen corresponding path program 1 times [2020-07-20 10:45:42,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:42,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674723075] [2020-07-20 10:45:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674723075] [2020-07-20 10:45:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 10:45:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188268857] [2020-07-20 10:45:42,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 10:45:42,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 10:45:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:45:42,614 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 15 states. [2020-07-20 10:45:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:42,882 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2020-07-20 10:45:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:45:42,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-07-20 10:45:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:42,885 INFO L225 Difference]: With dead ends: 119 [2020-07-20 10:45:42,886 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 10:45:42,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:45:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 10:45:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-07-20 10:45:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 10:45:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2020-07-20 10:45:42,897 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 57 [2020-07-20 10:45:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:42,897 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2020-07-20 10:45:42,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 10:45:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2020-07-20 10:45:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:45:42,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:42,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:43,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1390837075, now seen corresponding path program 2 times [2020-07-20 10:45:43,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544398403] [2020-07-20 10:45:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:43,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:43,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544398403] [2020-07-20 10:45:43,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:43,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:43,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389660849] [2020-07-20 10:45:43,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:43,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:43,170 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand 4 states. [2020-07-20 10:45:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:43,238 INFO L93 Difference]: Finished difference Result 176 states and 243 transitions. [2020-07-20 10:45:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:43,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-20 10:45:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:43,240 INFO L225 Difference]: With dead ends: 176 [2020-07-20 10:45:43,240 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 10:45:43,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 10:45:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-07-20 10:45:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 10:45:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2020-07-20 10:45:43,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 58 [2020-07-20 10:45:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:43,252 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2020-07-20 10:45:43,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2020-07-20 10:45:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:45:43,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:43,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:43,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,468 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash -510940175, now seen corresponding path program 1 times [2020-07-20 10:45:43,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922503874] [2020-07-20 10:45:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:43,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:43,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922503874] [2020-07-20 10:45:43,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:43,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:43,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086665919] [2020-07-20 10:45:43,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:43,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:43,549 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand 4 states. [2020-07-20 10:45:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:43,636 INFO L93 Difference]: Finished difference Result 188 states and 260 transitions. [2020-07-20 10:45:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:45:43,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-20 10:45:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:43,639 INFO L225 Difference]: With dead ends: 188 [2020-07-20 10:45:43,639 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 10:45:43,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 10:45:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2020-07-20 10:45:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 10:45:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2020-07-20 10:45:43,660 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 58 [2020-07-20 10:45:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:43,661 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2020-07-20 10:45:43,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2020-07-20 10:45:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 10:45:43,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:43,663 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:43,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,877 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash -113150704, now seen corresponding path program 1 times [2020-07-20 10:45:43,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995386966] [2020-07-20 10:45:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:43,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:43,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995386966] [2020-07-20 10:45:43,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:43,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:43,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071611649] [2020-07-20 10:45:43,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:43,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:43,955 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand 4 states. [2020-07-20 10:45:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:44,036 INFO L93 Difference]: Finished difference Result 171 states and 221 transitions. [2020-07-20 10:45:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:45:44,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-07-20 10:45:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:44,038 INFO L225 Difference]: With dead ends: 171 [2020-07-20 10:45:44,038 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 10:45:44,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 10:45:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-07-20 10:45:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:45:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-07-20 10:45:44,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-07-20 10:45:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:44,046 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-07-20 10:45:44,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-07-20 10:45:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 10:45:44,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:44,048 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:44,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:44,261 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1457414028, now seen corresponding path program 1 times [2020-07-20 10:45:44,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:44,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614707223] [2020-07-20 10:45:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:44,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:44,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:44,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614707223] [2020-07-20 10:45:44,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:44,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:44,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853672481] [2020-07-20 10:45:44,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:44,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:44,322 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 4 states. [2020-07-20 10:45:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:44,358 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-07-20 10:45:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:44,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-07-20 10:45:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:44,363 INFO L225 Difference]: With dead ends: 129 [2020-07-20 10:45:44,363 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 10:45:44,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 10:45:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 10:45:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 10:45:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-20 10:45:44,373 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 64 [2020-07-20 10:45:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:44,374 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-20 10:45:44,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-20 10:45:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 10:45:44,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:44,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:44,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:44,588 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1769332683, now seen corresponding path program 1 times [2020-07-20 10:45:44,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:44,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919785912] [2020-07-20 10:45:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:44,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:44,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919785912] [2020-07-20 10:45:44,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:44,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:45:44,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543474084] [2020-07-20 10:45:44,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:45:44,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:45:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:44,674 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 5 states. [2020-07-20 10:45:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:44,789 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2020-07-20 10:45:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:44,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-07-20 10:45:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:44,791 INFO L225 Difference]: With dead ends: 145 [2020-07-20 10:45:44,791 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 10:45:44,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 10:45:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-07-20 10:45:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 10:45:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-20 10:45:44,802 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 66 [2020-07-20 10:45:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:44,804 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-20 10:45:44,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:45:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-20 10:45:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 10:45:44,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:44,805 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:45,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,020 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash -976969789, now seen corresponding path program 1 times [2020-07-20 10:45:45,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:45,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302754380] [2020-07-20 10:45:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:45:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:45,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302754380] [2020-07-20 10:45:45,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:45,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 10:45:45,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814619488] [2020-07-20 10:45:45,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:45,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:45,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:45,167 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2020-07-20 10:45:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:45,247 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2020-07-20 10:45:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:45,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-20 10:45:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:45,249 INFO L225 Difference]: With dead ends: 156 [2020-07-20 10:45:45,251 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 10:45:45,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:45:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 10:45:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-07-20 10:45:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 10:45:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-07-20 10:45:45,267 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 67 [2020-07-20 10:45:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:45,267 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-07-20 10:45:45,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-07-20 10:45:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 10:45:45,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:45,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:45,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,485 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 376080324, now seen corresponding path program 1 times [2020-07-20 10:45:45,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:45,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679030929] [2020-07-20 10:45:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:45:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:45,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679030929] [2020-07-20 10:45:45,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:45,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 10:45:45,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556746649] [2020-07-20 10:45:45,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:45:45,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:45:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:45,688 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-07-20 10:45:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:48,146 INFO L93 Difference]: Finished difference Result 189 states and 233 transitions. [2020-07-20 10:45:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:45:48,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-20 10:45:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:48,149 INFO L225 Difference]: With dead ends: 189 [2020-07-20 10:45:48,149 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 10:45:48,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=90, Invalid=149, Unknown=1, NotChecked=0, Total=240 [2020-07-20 10:45:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 10:45:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-07-20 10:45:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 10:45:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-07-20 10:45:48,164 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 69 [2020-07-20 10:45:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:48,164 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-07-20 10:45:48,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:45:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-07-20 10:45:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-20 10:45:48,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:48,166 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:48,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:48,380 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash 152763316, now seen corresponding path program 2 times [2020-07-20 10:45:48,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:48,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760567560] [2020-07-20 10:45:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:48,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:48,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:48,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760567560] [2020-07-20 10:45:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:48,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 10:45:48,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955592926] [2020-07-20 10:45:48,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 10:45:48,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 10:45:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:45:48,661 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 14 states. [2020-07-20 10:45:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:48,763 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-07-20 10:45:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:45:48,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-07-20 10:45:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:48,765 INFO L225 Difference]: With dead ends: 212 [2020-07-20 10:45:48,765 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 10:45:48,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:45:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 10:45:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-07-20 10:45:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 10:45:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-20 10:45:48,786 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 76 [2020-07-20 10:45:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:48,786 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-20 10:45:48,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 10:45:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-20 10:45:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 10:45:48,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:48,787 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:49,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:49,002 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2142751612, now seen corresponding path program 2 times [2020-07-20 10:45:49,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:49,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267036319] [2020-07-20 10:45:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:49,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:49,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:49,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:49,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267036319] [2020-07-20 10:45:49,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:49,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 10:45:49,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728019079] [2020-07-20 10:45:49,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 10:45:49,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 10:45:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 10:45:49,453 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 18 states. [2020-07-20 10:46:00,303 WARN L193 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 10:46:15,298 WARN L193 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 10:46:32,084 WARN L193 SmtUtils]: Spent 12.43 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-20 10:46:49,416 WARN L193 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 10:46:59,977 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 10:47:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:06,578 INFO L93 Difference]: Finished difference Result 223 states and 277 transitions. [2020-07-20 10:47:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 10:47:06,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-07-20 10:47:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:06,582 INFO L225 Difference]: With dead ends: 223 [2020-07-20 10:47:06,582 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 10:47:06,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=315, Invalid=602, Unknown=13, NotChecked=0, Total=930 [2020-07-20 10:47:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 10:47:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2020-07-20 10:47:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 10:47:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2020-07-20 10:47:06,597 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 81 [2020-07-20 10:47:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:06,598 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2020-07-20 10:47:06,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 10:47:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2020-07-20 10:47:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 10:47:06,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:06,602 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:06,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:06,817 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1025892204, now seen corresponding path program 3 times [2020-07-20 10:47:06,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:06,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928208018] [2020-07-20 10:47:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:47:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 26 proven. 155 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:47:07,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:47:07,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928208018] [2020-07-20 10:47:07,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:07,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 10:47:07,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941342229] [2020-07-20 10:47:07,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 10:47:07,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 10:47:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 10:47:07,579 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand 26 states. [2020-07-20 10:47:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:07,788 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2020-07-20 10:47:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 10:47:07,789 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-07-20 10:47:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:07,792 INFO L225 Difference]: With dead ends: 320 [2020-07-20 10:47:07,793 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 10:47:07,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=383, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:47:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 10:47:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 134. [2020-07-20 10:47:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 10:47:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2020-07-20 10:47:07,817 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 94 [2020-07-20 10:47:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:07,818 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2020-07-20 10:47:07,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 10:47:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2020-07-20 10:47:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-20 10:47:07,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:07,822 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:08,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:08,035 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1813786116, now seen corresponding path program 3 times [2020-07-20 10:47:08,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:08,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740564057] [2020-07-20 10:47:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 10:47:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 273 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:47:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 4 proven. 283 refuted. 1 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:47:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740564057] [2020-07-20 10:47:11,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:11,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 10:47:11,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019543954] [2020-07-20 10:47:11,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 10:47:11,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 10:47:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=815, Unknown=1, NotChecked=0, Total=1122 [2020-07-20 10:47:11,506 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand 34 states. [2020-07-20 10:47:39,837 WARN L193 SmtUtils]: Spent 16.65 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 10:48:09,277 WARN L193 SmtUtils]: Spent 16.87 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 10:48:39,884 WARN L193 SmtUtils]: Spent 14.70 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 10:49:07,347 WARN L193 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 10:49:47,149 WARN L193 SmtUtils]: Spent 25.01 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-07-20 10:50:00,081 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 10:50:19,128 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 10:50:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:28,045 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2020-07-20 10:50:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 10:50:28,048 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2020-07-20 10:50:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:28,050 INFO L225 Difference]: With dead ends: 291 [2020-07-20 10:50:28,051 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 10:50:28,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 189.8s TimeCoverageRelationStatistics Valid=924, Invalid=2231, Unknown=37, NotChecked=0, Total=3192 [2020-07-20 10:50:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 10:50:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-07-20 10:50:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 10:50:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-07-20 10:50:28,070 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 105 [2020-07-20 10:50:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:28,070 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-07-20 10:50:28,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 10:50:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-07-20 10:50:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 10:50:28,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:28,072 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:28,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:28,274 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash -394001836, now seen corresponding path program 4 times [2020-07-20 10:50:28,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:28,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922589911] [2020-07-20 10:50:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 10:50:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 26 proven. 737 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:50:28,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 4 proven. 747 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:50:31,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922589911] [2020-07-20 10:50:31,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:31,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 10:50:31,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555393520] [2020-07-20 10:50:31,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 10:50:31,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:31,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 10:50:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 10:50:31,054 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 50 states. [2020-07-20 10:50:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:31,718 INFO L93 Difference]: Finished difference Result 518 states and 701 transitions. [2020-07-20 10:50:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 10:50:31,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 130 [2020-07-20 10:50:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:31,725 INFO L225 Difference]: With dead ends: 518 [2020-07-20 10:50:31,726 INFO L226 Difference]: Without dead ends: 386 [2020-07-20 10:50:31,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1207, Invalid=1343, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 10:50:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-20 10:50:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 206. [2020-07-20 10:50:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 10:50:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2020-07-20 10:50:31,761 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 130 [2020-07-20 10:50:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:31,762 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2020-07-20 10:50:31,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 10:50:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2020-07-20 10:50:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:50:31,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:31,765 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:31,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:31,980 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 4 times [2020-07-20 10:50:31,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:31,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325880460] [2020-07-20 10:50:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:50:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 10:50:32,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:32,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325880460] [2020-07-20 10:50:32,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:32,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 10:50:32,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973954399] [2020-07-20 10:50:32,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:50:32,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:50:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:50:32,529 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand 10 states. [2020-07-20 10:50:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:32,839 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-07-20 10:50:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:50:32,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-20 10:50:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:32,844 INFO L225 Difference]: With dead ends: 226 [2020-07-20 10:50:32,844 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 10:50:32,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:50:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 10:50:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-20 10:50:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 10:50:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 263 transitions. [2020-07-20 10:50:32,879 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 263 transitions. Word has length 135 [2020-07-20 10:50:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:32,881 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 263 transitions. [2020-07-20 10:50:32,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:50:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 263 transitions. [2020-07-20 10:50:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:50:32,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:32,887 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:33,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:33,101 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:33,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:33,102 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-20 10:50:33,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:33,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749016934] [2020-07-20 10:50:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 10:50:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 10:50:33,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:34,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749016934] [2020-07-20 10:50:34,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:34,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-20 10:50:34,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849237824] [2020-07-20 10:50:34,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 10:50:34,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 10:50:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:50:34,246 INFO L87 Difference]: Start difference. First operand 206 states and 263 transitions. Second operand 14 states. [2020-07-20 10:50:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:34,792 INFO L93 Difference]: Finished difference Result 221 states and 278 transitions. [2020-07-20 10:50:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:50:34,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-20 10:50:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:34,799 INFO L225 Difference]: With dead ends: 221 [2020-07-20 10:50:34,799 INFO L226 Difference]: Without dead ends: 203 [2020-07-20 10:50:34,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-07-20 10:50:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-20 10:50:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-07-20 10:50:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-20 10:50:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 259 transitions. [2020-07-20 10:50:34,816 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 259 transitions. Word has length 135 [2020-07-20 10:50:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:34,816 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 259 transitions. [2020-07-20 10:50:34,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 10:50:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 259 transitions. [2020-07-20 10:50:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:50:34,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:34,818 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:35,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:35,032 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-20 10:50:35,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:35,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002274648] [2020-07-20 10:50:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 10:50:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-20 10:50:35,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:35,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002274648] [2020-07-20 10:50:35,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:35,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 10:50:35,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923301152] [2020-07-20 10:50:35,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:50:35,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:50:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:50:35,747 INFO L87 Difference]: Start difference. First operand 203 states and 259 transitions. Second operand 10 states. [2020-07-20 10:50:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:36,020 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2020-07-20 10:50:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:50:36,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-20 10:50:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:36,021 INFO L225 Difference]: With dead ends: 203 [2020-07-20 10:50:36,021 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:50:36,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:50:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:50:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:50:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:50:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:50:36,024 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-20 10:50:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:36,024 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:50:36,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:50:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:50:36,025 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:50:36,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:36,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:50:36,390 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 11 [2020-07-20 10:50:36,788 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-20 10:50:37,276 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 11 [2020-07-20 10:50:37,469 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-20 10:50:37,789 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 449 [2020-07-20 10:50:38,109 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 2253 DAG size of output: 35 [2020-07-20 10:50:38,403 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2244 DAG size of output: 20 [2020-07-20 10:50:38,751 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 605 [2020-07-20 10:50:38,888 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 9 [2020-07-20 10:50:39,377 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 1026 DAG size of output: 901 [2020-07-20 10:50:40,028 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2020-07-20 10:50:40,143 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-07-20 10:50:40,513 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 32 [2020-07-20 10:50:41,310 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 795 DAG size of output: 20 [2020-07-20 10:50:41,319 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 10:50:41,319 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (and (or (= 0 base2flt_~__retres4~0) (not (= 0 (mod |base2flt_#in~m| 4294967296)))) (or (and (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (= 0 (mod |base2flt_#in~m| 4294967296))))) [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 10:50:41,319 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|))) (not (= 0 (mod |base2flt_#in~m| 4294967296))) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (= 0 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 10:50:41,320 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 10:50:41,321 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 10:50:41,321 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 10:50:41,321 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 10:50:41,321 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 10:50:41,321 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 10:50:41,321 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 10:50:41,322 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse0 (= mulflt_~b |mulflt_#in~b|)) (.cse1 (= 0 mulflt_~__retres10~1))) (and (or (and (not (= 0 (mod |mulflt_#in~a| 4294967296))) (= mulflt_~b |mulflt_#in~a|)) (and (= mulflt_~a |mulflt_#in~a|) .cse0 (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296))) .cse1) (or (exists ((v_mulflt_~a_6 Int)) (< (mod v_mulflt_~a_6 4294967296) (mod |mulflt_#in~b| 4294967296))) (and .cse0 .cse1)))) [2020-07-20 10:50:41,322 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 10:50:41,322 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:50:41,322 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:50:41,322 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:50:41,322 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:50:41,322 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 10:50:41,322 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 10:50:41,323 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 10:50:41,324 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 10:50:41,324 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 10:50:41,324 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 10:50:41,324 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 10:50:41,324 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 10:50:41,324 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-20 10:50:41,324 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 10:50:41,324 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (or (= 0 main_~zero~0) (= 0 main_~a~0)) [2020-07-20 10:50:41,325 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (<= (+ main_~sa~0 1) 0) (and (<= 1 main_~sa~0) (<= 1 main_~tmp~2)) (and .cse0 (= 0 main_~b~0)) (and (or .cse0 (and (= 0 main_~a~0) (<= (mod main_~zero~0 4294967296) 0))) (<= (mod main_~a~0 4294967296) 0)))) [2020-07-20 10:50:41,325 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 10:50:41,325 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 10:50:41,325 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 10:50:41,325 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 10:50:41,325 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 10:50:41,325 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 10:50:41,325 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 10:50:41,326 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 10:50:41,327 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 10:50:41,347 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:41,349 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:41,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:50:41 BoogieIcfgContainer [2020-07-20 10:50:41,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:50:41,353 INFO L168 Benchmark]: Toolchain (without parser) took 303669.90 ms. Allocated memory was 145.8 MB in the beginning and 326.1 MB in the end (delta: 180.4 MB). Free memory was 102.8 MB in the beginning and 153.6 MB in the end (delta: -50.8 MB). Peak memory consumption was 178.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,354 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.51 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.6 MB in the beginning and 182.2 MB in the end (delta: -79.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,355 INFO L168 Benchmark]: Boogie Preprocessor took 49.45 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,356 INFO L168 Benchmark]: RCFGBuilder took 575.75 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 154.0 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,356 INFO L168 Benchmark]: TraceAbstraction took 302625.44 ms. Allocated memory was 203.4 MB in the beginning and 326.1 MB in the end (delta: 122.7 MB). Free memory was 154.0 MB in the beginning and 153.6 MB in the end (delta: 457.2 kB). Peak memory consumption was 172.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:41,359 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 412.51 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.6 MB in the beginning and 182.2 MB in the end (delta: -79.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.45 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 575.75 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 154.0 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 302625.44 ms. Allocated memory was 203.4 MB in the beginning and 326.1 MB in the end (delta: 122.7 MB). Free memory was 154.0 MB in the beginning and 153.6 MB in the end (delta: 457.2 kB). Peak memory consumption was 172.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(0 == \old(m) % 4294967296) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (0 == __retres4 || !(0 == \old(m) % 4294967296)) && (((\old(e) <= e && m == \old(m)) && e <= \old(e)) || !(0 == \old(m) % 4294967296)) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 10:50:41,365 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:41,366 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] Derived loop invariant: (((!(0 == \old(a) % 4294967296) && b == \old(a)) || ((a == \old(a) && b == \old(b)) && b % 4294967296 <= \old(a) % 4294967296)) || 0 == __retres10) && ((\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296) || (b == \old(b) && 0 == __retres10)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((m % 4294967296 < 16777216 || !(1 == \old(m))) && !(0 == \old(m) % 4294967296)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 297.4s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 279.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1491 SDtfs, 2243 SDslu, 7237 SDs, 0 SdLazy, 3004 SolverSat, 475 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 15.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2582 GetRequests, 2239 SyntacticMatches, 21 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 271.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 23 MinimizatonAttempts, 493 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 304 PreInvPairs, 1445 NumberOfFragments, 175 HoareAnnotationTreeSize, 304 FomulaSimplifications, 605153797 FormulaSimplificationTreeSizeReduction, 3.6s HoareSimplificationTime, 18 FomulaSimplificationsInter, 10160 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 1745 NumberOfCodeBlocks, 1745 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 2393 ConstructedInterpolants, 8 QuantifiedInterpolants, 548767 SizeOfPredicates, 51 NumberOfNonLiveVariables, 4602 ConjunctsInSsa, 273 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 3408/6011 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 proved your program to be correct! Received shutdown request...