/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 13:06:26,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:26,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:26,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:26,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:26,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:26,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:26,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:26,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:26,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:26,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:26,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:26,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:26,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:26,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:26,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:26,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:26,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:26,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:26,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:26,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:26,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:26,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:26,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:26,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:26,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:26,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:26,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:26,566 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 13:06:26,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:26,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:26,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:26,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:26,588 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:26,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:26,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:26,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:26,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:26,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:26,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:26,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:26,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:26,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:26,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:26,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:26,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:26,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:26,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:26,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:26,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:26,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:26,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:26,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:26,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:26,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:26,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:26,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:26,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:26,594 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:26,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:26,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:26,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:26,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:26,897 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:26,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 13:06:26,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a388dd307/c04a704ecee74aa08db19609dec1965e/FLAG856d2d0a3 [2020-07-20 13:06:27,441 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:27,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-20 13:06:27,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a388dd307/c04a704ecee74aa08db19609dec1965e/FLAG856d2d0a3 [2020-07-20 13:06:27,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a388dd307/c04a704ecee74aa08db19609dec1965e [2020-07-20 13:06:27,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:27,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:27,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:27,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:27,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:27,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:27" (1/1) ... [2020-07-20 13:06:27,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44193db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:27, skipping insertion in model container [2020-07-20 13:06:27,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:27" (1/1) ... [2020-07-20 13:06:27,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:27,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:28,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:28,096 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:28,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:28,255 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:28,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28 WrapperNode [2020-07-20 13:06:28,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:28,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:28,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:28,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:28,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (1/1) ... [2020-07-20 13:06:28,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:28,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:28,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:28,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:28,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (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 13:06:28,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 13:06:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 13:06:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 13:06:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 13:06:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 13:06:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 13:06:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 13:06:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 13:06:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 13:06:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 13:06:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:28,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:28,850 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 13:06:28,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:28 BoogieIcfgContainer [2020-07-20 13:06:28,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:28,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:28,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:28,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:28,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:27" (1/3) ... [2020-07-20 13:06:28,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b09f6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:28, skipping insertion in model container [2020-07-20 13:06:28,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:28" (2/3) ... [2020-07-20 13:06:28,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b09f6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:28, skipping insertion in model container [2020-07-20 13:06:28,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:28" (3/3) ... [2020-07-20 13:06:28,871 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-20 13:06:28,879 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:28,885 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:28,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:28,928 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:28,928 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:28,928 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:28,928 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:28,929 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:28,929 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:28,929 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:28,929 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 13:06:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 13:06:28,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:28,956 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 13:06:28,956 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 13:06:28,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:28,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248657375] [2020-07-20 13:06:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:29,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:06:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:29,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:29,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248657375] [2020-07-20 13:06:29,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:29,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048379639] [2020-07-20 13:06:29,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:29,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:29,199 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-07-20 13:06:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:29,342 INFO L93 Difference]: Finished difference Result 126 states and 192 transitions. [2020-07-20 13:06:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:29,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 13:06:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:29,356 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:06:29,357 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 13:06:29,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 13:06:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 13:06:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-07-20 13:06:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 13:06:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-20 13:06:29,418 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 48 [2020-07-20 13:06:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:29,419 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-20 13:06:29,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-20 13:06:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 13:06:29,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:29,423 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] [2020-07-20 13:06:29,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:29,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-07-20 13:06:29,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:29,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730429974] [2020-07-20 13:06:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:29,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:06:29,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:29,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:29,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:29,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730429974] [2020-07-20 13:06:29,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:29,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:29,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614060191] [2020-07-20 13:06:29,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:29,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:29,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:29,738 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 4 states. [2020-07-20 13:06:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:29,825 INFO L93 Difference]: Finished difference Result 113 states and 156 transitions. [2020-07-20 13:06:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:06:29,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-07-20 13:06:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:29,828 INFO L225 Difference]: With dead ends: 113 [2020-07-20 13:06:29,828 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 13:06:29,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 13:06:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 13:06:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-07-20 13:06:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 13:06:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-07-20 13:06:29,842 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 51 [2020-07-20 13:06:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:29,842 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-07-20 13:06:29,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-07-20 13:06:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:06:29,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:29,845 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] [2020-07-20 13:06:30,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:30,061 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1437145176, now seen corresponding path program 1 times [2020-07-20 13:06:30,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019487743] [2020-07-20 13:06:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:30,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:30,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:30,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019487743] [2020-07-20 13:06:30,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:30,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:30,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50644534] [2020-07-20 13:06:30,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:30,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:30,188 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 4 states. [2020-07-20 13:06:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:30,257 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2020-07-20 13:06:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:06:30,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 13:06:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:30,260 INFO L225 Difference]: With dead ends: 124 [2020-07-20 13:06:30,260 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 13:06:30,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 13:06:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 13:06:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-20 13:06:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 13:06:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2020-07-20 13:06:30,273 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2020-07-20 13:06:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:30,274 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2020-07-20 13:06:30,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2020-07-20 13:06:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:06:30,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:30,276 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] [2020-07-20 13:06:30,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:30,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1843842924, now seen corresponding path program 1 times [2020-07-20 13:06:30,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:30,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390235311] [2020-07-20 13:06:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:30,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:06:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:30,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:30,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390235311] [2020-07-20 13:06:30,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:30,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:06:30,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424613442] [2020-07-20 13:06:30,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:06:30,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:06:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:06:30,606 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand 4 states. [2020-07-20 13:06:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:30,700 INFO L93 Difference]: Finished difference Result 128 states and 177 transitions. [2020-07-20 13:06:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:30,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-20 13:06:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:30,702 INFO L225 Difference]: With dead ends: 128 [2020-07-20 13:06:30,702 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:06:30,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 13:06:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:06:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-07-20 13:06:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 13:06:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-20 13:06:30,714 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 52 [2020-07-20 13:06:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:30,714 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-20 13:06:30,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:06:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-20 13:06:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 13:06:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:30,717 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] [2020-07-20 13:06:30,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:30,931 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-07-20 13:06:30,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:30,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739882686] [2020-07-20 13:06:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:30,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:30,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:30,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:31,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:31,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739882686] [2020-07-20 13:06:31,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:31,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:31,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291386876] [2020-07-20 13:06:31,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:31,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:31,016 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 5 states. [2020-07-20 13:06:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:31,145 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2020-07-20 13:06:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:06:31,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-07-20 13:06:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:31,148 INFO L225 Difference]: With dead ends: 133 [2020-07-20 13:06:31,148 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:06:31,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 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 13:06:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:06:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-20 13:06:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 13:06:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-07-20 13:06:31,161 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 53 [2020-07-20 13:06:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:31,161 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-07-20 13:06:31,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-07-20 13:06:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:06:31,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:31,163 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:31,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:31,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-07-20 13:06:31,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:31,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591930861] [2020-07-20 13:06:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:31,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:06:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:31,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:31,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:31,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:31,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591930861] [2020-07-20 13:06:31,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:31,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 13:06:31,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954394302] [2020-07-20 13:06:31,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:06:31,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:06:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:06:31,568 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 8 states. [2020-07-20 13:06:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:31,668 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2020-07-20 13:06:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:06:31,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-20 13:06:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:31,671 INFO L225 Difference]: With dead ends: 147 [2020-07-20 13:06:31,671 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:06:31,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:06:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-07-20 13:06:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 13:06:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2020-07-20 13:06:31,683 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 54 [2020-07-20 13:06:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:31,684 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2020-07-20 13:06:31,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:06:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2020-07-20 13:06:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 13:06:31,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:31,686 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] [2020-07-20 13:06:31,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:31,901 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-07-20 13:06:31,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:31,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900645274] [2020-07-20 13:06:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:31,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:06:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:31,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:32,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900645274] [2020-07-20 13:06:32,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:32,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 13:06:32,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566493712] [2020-07-20 13:06:32,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:06:32,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:06:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:32,109 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 10 states. [2020-07-20 13:06:38,522 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 13:06:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:38,702 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-07-20 13:06:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:06:38,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-20 13:06:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:38,704 INFO L225 Difference]: With dead ends: 172 [2020-07-20 13:06:38,705 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 13:06:38,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:06:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 13:06:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2020-07-20 13:06:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:06:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-07-20 13:06:38,718 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 56 [2020-07-20 13:06:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:38,718 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-07-20 13:06:38,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:06:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-07-20 13:06:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-20 13:06:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:38,720 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-07-20 13:06:38,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:38,930 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 2 times [2020-07-20 13:06:38,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:38,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976307879] [2020-07-20 13:06:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:38,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:38,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:39,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:39,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976307879] [2020-07-20 13:06:39,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:39,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 13:06:39,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842697159] [2020-07-20 13:06:39,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:06:39,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:06:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:06:39,232 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 14 states. [2020-07-20 13:06:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:39,420 INFO L93 Difference]: Finished difference Result 210 states and 300 transitions. [2020-07-20 13:06:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 13:06:39,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-07-20 13:06:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:39,422 INFO L225 Difference]: With dead ends: 210 [2020-07-20 13:06:39,422 INFO L226 Difference]: Without dead ends: 144 [2020-07-20 13:06:39,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:06:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-20 13:06:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-07-20 13:06:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:06:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-07-20 13:06:39,447 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 63 [2020-07-20 13:06:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:39,448 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-07-20 13:06:39,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:06:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-07-20 13:06:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 13:06:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:39,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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] [2020-07-20 13:06:39,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:39,664 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 2 times [2020-07-20 13:06:39,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:39,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033466831] [2020-07-20 13:06:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:06:39,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:39,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:06:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:06:39,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:06:40,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033466831] [2020-07-20 13:06:40,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:40,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 13:06:40,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914358046] [2020-07-20 13:06:40,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:06:40,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:06:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:06:40,123 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 18 states. [2020-07-20 13:06:53,764 WARN L193 SmtUtils]: Spent 13.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 13:07:18,596 WARN L193 SmtUtils]: Spent 18.62 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 13:07:47,697 WARN L193 SmtUtils]: Spent 24.84 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 13:08:05,412 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 13:08:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:16,209 INFO L93 Difference]: Finished difference Result 242 states and 352 transitions. [2020-07-20 13:08:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 13:08:16,209 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-07-20 13:08:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:16,211 INFO L225 Difference]: With dead ends: 242 [2020-07-20 13:08:16,212 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 13:08:16,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 91.5s TimeCoverageRelationStatistics Valid=314, Invalid=602, Unknown=14, NotChecked=0, Total=930 [2020-07-20 13:08:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 13:08:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-07-20 13:08:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 13:08:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 147 transitions. [2020-07-20 13:08:16,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 147 transitions. Word has length 68 [2020-07-20 13:08:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:16,245 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 147 transitions. [2020-07-20 13:08:16,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:08:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 147 transitions. [2020-07-20 13:08:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 13:08:16,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:16,249 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2020-07-20 13:08:16,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:16,463 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 3 times [2020-07-20 13:08:16,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:16,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213171753] [2020-07-20 13:08:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:08:16,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:08:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:08:16,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:08:16,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:08:17,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213171753] [2020-07-20 13:08:17,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:17,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 13:08:17,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93116199] [2020-07-20 13:08:17,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:08:17,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:17,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:08:17,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:08:17,163 INFO L87 Difference]: Start difference. First operand 100 states and 147 transitions. Second operand 26 states. [2020-07-20 13:08:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:17,580 INFO L93 Difference]: Finished difference Result 336 states and 488 transitions. [2020-07-20 13:08:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 13:08:17,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-07-20 13:08:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:17,584 INFO L225 Difference]: With dead ends: 336 [2020-07-20 13:08:17,584 INFO L226 Difference]: Without dead ends: 246 [2020-07-20 13:08:17,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 13:08:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-20 13:08:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2020-07-20 13:08:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-20 13:08:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 190 transitions. [2020-07-20 13:08:17,607 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 190 transitions. Word has length 81 [2020-07-20 13:08:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:17,608 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 190 transitions. [2020-07-20 13:08:17,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:08:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 190 transitions. [2020-07-20 13:08:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 13:08:17,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:17,609 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 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] [2020-07-20 13:08:17,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:17,824 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -316492522, now seen corresponding path program 3 times [2020-07-20 13:08:17,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:17,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979963782] [2020-07-20 13:08:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:08:17,875 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:08:17,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:17,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 13:08:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:08:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:08:19,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979963782] [2020-07-20 13:08:19,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:19,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 13:08:19,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028942830] [2020-07-20 13:08:19,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 13:08:19,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:19,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 13:08:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:08:19,100 INFO L87 Difference]: Start difference. First operand 126 states and 190 transitions. Second operand 34 states. [2020-07-20 13:08:42,061 WARN L193 SmtUtils]: Spent 11.35 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 13:08:58,473 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 13:09:27,315 WARN L193 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 13:09:52,644 WARN L193 SmtUtils]: Spent 14.55 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 13:10:11,718 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 13:10:34,726 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 13:11:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:01,187 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2020-07-20 13:11:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 13:11:01,189 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2020-07-20 13:11:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:01,191 INFO L225 Difference]: With dead ends: 346 [2020-07-20 13:11:01,191 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 13:11:01,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 150.3s TimeCoverageRelationStatistics Valid=913, Invalid=2232, Unknown=47, NotChecked=0, Total=3192 [2020-07-20 13:11:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 13:11:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 130. [2020-07-20 13:11:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 13:11:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 197 transitions. [2020-07-20 13:11:01,210 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 197 transitions. Word has length 92 [2020-07-20 13:11:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:01,212 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 197 transitions. [2020-07-20 13:11:01,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 13:11:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 197 transitions. [2020-07-20 13:11:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 13:11:01,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:01,214 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 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] [2020-07-20 13:11:01,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:01,428 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1829248710, now seen corresponding path program 4 times [2020-07-20 13:11:01,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:01,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861219595] [2020-07-20 13:11:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:01,492 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:11:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 13:11:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:11:02,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:11:03,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861219595] [2020-07-20 13:11:03,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:03,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 13:11:03,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008253293] [2020-07-20 13:11:03,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 13:11:03,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 13:11:03,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 13:11:03,855 INFO L87 Difference]: Start difference. First operand 130 states and 197 transitions. Second operand 50 states. [2020-07-20 13:11:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:05,114 INFO L93 Difference]: Finished difference Result 570 states and 840 transitions. [2020-07-20 13:11:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-20 13:11:05,116 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-07-20 13:11:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:05,120 INFO L225 Difference]: With dead ends: 570 [2020-07-20 13:11:05,121 INFO L226 Difference]: Without dead ends: 450 [2020-07-20 13:11:05,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 13:11:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-20 13:11:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 198. [2020-07-20 13:11:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 310 transitions. [2020-07-20 13:11:05,169 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 310 transitions. Word has length 117 [2020-07-20 13:11:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:05,170 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 310 transitions. [2020-07-20 13:11:05,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 13:11:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 310 transitions. [2020-07-20 13:11:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 13:11:05,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:05,172 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:05,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,386 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash -552090314, now seen corresponding path program 4 times [2020-07-20 13:11:05,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:05,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050372835] [2020-07-20 13:11:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:05,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:05,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:11:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 13:11:05,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:05,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050372835] [2020-07-20 13:11:05,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:11:05,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 13:11:05,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364447150] [2020-07-20 13:11:05,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:05,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:05,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:11:05,561 INFO L87 Difference]: Start difference. First operand 198 states and 310 transitions. Second operand 6 states. [2020-07-20 13:11:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:05,633 INFO L93 Difference]: Finished difference Result 227 states and 350 transitions. [2020-07-20 13:11:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:05,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-07-20 13:11:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:05,636 INFO L225 Difference]: With dead ends: 227 [2020-07-20 13:11:05,636 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 13:11:05,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:11:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 13:11:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2020-07-20 13:11:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 308 transitions. [2020-07-20 13:11:05,653 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 308 transitions. Word has length 122 [2020-07-20 13:11:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:05,653 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 308 transitions. [2020-07-20 13:11:05,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 308 transitions. [2020-07-20 13:11:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:05,656 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:05,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:05,871 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:05,871 INFO L82 PathProgramCache]: Analyzing trace with hash 574571712, now seen corresponding path program 1 times [2020-07-20 13:11:05,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:05,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636666865] [2020-07-20 13:11:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:05,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:11:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:11:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:06,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:06,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636666865] [2020-07-20 13:11:06,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:06,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:06,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383512475] [2020-07-20 13:11:06,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:06,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:06,045 INFO L87 Difference]: Start difference. First operand 198 states and 308 transitions. Second operand 6 states. [2020-07-20 13:11:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:06,158 INFO L93 Difference]: Finished difference Result 229 states and 349 transitions. [2020-07-20 13:11:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:06,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 13:11:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:06,161 INFO L225 Difference]: With dead ends: 229 [2020-07-20 13:11:06,161 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 13:11:06,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 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 13:11:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 13:11:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2020-07-20 13:11:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 13:11:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 316 transitions. [2020-07-20 13:11:06,176 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 316 transitions. Word has length 126 [2020-07-20 13:11:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:06,177 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 316 transitions. [2020-07-20 13:11:06,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 316 transitions. [2020-07-20 13:11:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:06,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:06,179 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:06,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:06,394 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash -436545538, now seen corresponding path program 1 times [2020-07-20 13:11:06,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:06,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843752278] [2020-07-20 13:11:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:06,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:11:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:06,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:06,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843752278] [2020-07-20 13:11:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:06,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:11:06,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73513500] [2020-07-20 13:11:06,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:11:06,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:11:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:11:06,554 INFO L87 Difference]: Start difference. First operand 204 states and 316 transitions. Second operand 4 states. [2020-07-20 13:11:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:06,587 INFO L93 Difference]: Finished difference Result 214 states and 326 transitions. [2020-07-20 13:11:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:11:06,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-07-20 13:11:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:06,590 INFO L225 Difference]: With dead ends: 214 [2020-07-20 13:11:06,590 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 13:11:06,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 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 13:11:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 13:11:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-07-20 13:11:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 13:11:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 307 transitions. [2020-07-20 13:11:06,604 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 307 transitions. Word has length 126 [2020-07-20 13:11:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:06,605 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 307 transitions. [2020-07-20 13:11:06,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:11:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 307 transitions. [2020-07-20 13:11:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:06,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:06,607 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:06,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:06,820 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572994, now seen corresponding path program 1 times [2020-07-20 13:11:06,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:06,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106230954] [2020-07-20 13:11:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:06,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 13:11:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-07-20 13:11:07,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:07,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106230954] [2020-07-20 13:11:07,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:07,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 13:11:07,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335952540] [2020-07-20 13:11:07,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:11:07,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:11:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:11:07,015 INFO L87 Difference]: Start difference. First operand 198 states and 307 transitions. Second operand 10 states. [2020-07-20 13:11:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:07,200 INFO L93 Difference]: Finished difference Result 248 states and 377 transitions. [2020-07-20 13:11:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:11:07,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-07-20 13:11:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:07,203 INFO L225 Difference]: With dead ends: 248 [2020-07-20 13:11:07,204 INFO L226 Difference]: Without dead ends: 238 [2020-07-20 13:11:07,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:11:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-20 13:11:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 221. [2020-07-20 13:11:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 13:11:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 345 transitions. [2020-07-20 13:11:07,233 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 345 transitions. Word has length 126 [2020-07-20 13:11:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:07,233 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 345 transitions. [2020-07-20 13:11:07,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:11:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 345 transitions. [2020-07-20 13:11:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:07,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:07,236 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:07,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:07,450 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-07-20 13:11:07,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:07,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271084009] [2020-07-20 13:11:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:07,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:07,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:07,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:11:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:07,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:07,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271084009] [2020-07-20 13:11:07,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:07,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:07,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114764725] [2020-07-20 13:11:07,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:07,584 INFO L87 Difference]: Start difference. First operand 221 states and 345 transitions. Second operand 6 states. [2020-07-20 13:11:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:07,644 INFO L93 Difference]: Finished difference Result 227 states and 350 transitions. [2020-07-20 13:11:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:07,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 13:11:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:07,647 INFO L225 Difference]: With dead ends: 227 [2020-07-20 13:11:07,648 INFO L226 Difference]: Without dead ends: 221 [2020-07-20 13:11:07,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 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 13:11:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-20 13:11:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-20 13:11:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 13:11:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 344 transitions. [2020-07-20 13:11:07,670 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 344 transitions. Word has length 126 [2020-07-20 13:11:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:07,670 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 344 transitions. [2020-07-20 13:11:07,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 344 transitions. [2020-07-20 13:11:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 13:11:07,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:07,674 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:07,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:07,889 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-20 13:11:07,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:07,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905129451] [2020-07-20 13:11:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:07,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:07,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:11:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-20 13:11:07,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:07,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905129451] [2020-07-20 13:11:07,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:07,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:07,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415287280] [2020-07-20 13:11:07,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:07,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:07,997 INFO L87 Difference]: Start difference. First operand 221 states and 344 transitions. Second operand 6 states. [2020-07-20 13:11:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:08,048 INFO L93 Difference]: Finished difference Result 237 states and 360 transitions. [2020-07-20 13:11:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:08,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-20 13:11:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:08,052 INFO L225 Difference]: With dead ends: 237 [2020-07-20 13:11:08,052 INFO L226 Difference]: Without dead ends: 221 [2020-07-20 13:11:08,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 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 13:11:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-20 13:11:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-20 13:11:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-20 13:11:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 340 transitions. [2020-07-20 13:11:08,073 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 340 transitions. Word has length 126 [2020-07-20 13:11:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:08,073 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 340 transitions. [2020-07-20 13:11:08,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 340 transitions. [2020-07-20 13:11:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 13:11:08,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:08,077 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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] [2020-07-20 13:11:08,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:08,290 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-07-20 13:11:08,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:08,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317801353] [2020-07-20 13:11:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 13:11:09,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:09,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:11:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-20 13:11:09,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:09,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317801353] [2020-07-20 13:11:09,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:11:09,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 13:11:09,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683693820] [2020-07-20 13:11:09,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:11:09,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:11:09,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:11:09,953 INFO L87 Difference]: Start difference. First operand 221 states and 340 transitions. Second operand 10 states. [2020-07-20 13:11:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:10,207 INFO L93 Difference]: Finished difference Result 221 states and 340 transitions. [2020-07-20 13:11:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:11:10,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 127 [2020-07-20 13:11:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:10,208 INFO L225 Difference]: With dead ends: 221 [2020-07-20 13:11:10,208 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:11:10,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:11:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:11:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:11:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:11:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:11:10,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2020-07-20 13:11:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:10,211 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:11:10,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:11:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:11:10,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:11:10,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:10,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:11:10,912 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 357 [2020-07-20 13:11:11,020 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 357 [2020-07-20 13:11:11,653 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-07-20 13:11:12,458 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 20 [2020-07-20 13:11:12,480 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:11:12,480 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:12,480 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 13:11:12,481 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 13:11:12,481 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|))) [2020-07-20 13:11:12,481 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 13:11:12,481 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 13:11:12,481 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 13:11:12,481 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-20 13:11:12,481 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 13:11:12,482 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 13:11:12,482 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 13:11:12,482 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-20 13:11:12,482 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 13:11:12,482 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 13:11:12,482 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 13:11:12,482 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 13:11:12,482 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 13:11:12,482 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 13:11:12,483 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 13:11:12,483 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (and (or (= 0 mulflt_~__retres10~1) (and (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)) (exists ((mulflt_~b Int)) (and (not (= 0 (mod mulflt_~b 4294967296))) (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)))))) (let ((.cse0 (= mulflt_~a |mulflt_#in~a|))) (or (and (or (= mulflt_~b |mulflt_#in~a|) .cse0) (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296))) (and .cse0 (= mulflt_~b |mulflt_#in~b|))))) [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:11:12,484 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 13:11:12,484 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 13:11:12,485 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 13:11:12,485 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 13:11:12,486 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 13:11:12,487 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 13:11:12,487 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:12,487 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 13:11:12,487 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 13:11:12,487 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 13:11:12,487 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 13:11:12,487 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 13:11:12,487 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~zero~0) (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-20 13:11:12,488 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 13:11:12,488 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:12,489 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (<= (mod main_~a~0 4294967296) 0)) (and .cse0 (<= 1 main_~sa~0) (<= 1 main_~tmp~2)))) [2020-07-20 13:11:12,489 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 13:11:12,489 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 13:11:12,489 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 13:11:12,489 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 13:11:12,490 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 13:11:12,491 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 13:11:12,492 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 13:11:12,515 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,516 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,521 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,522 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:11:12 BoogieIcfgContainer [2020-07-20 13:11:12,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:11:12,527 INFO L168 Benchmark]: Toolchain (without parser) took 284710.31 ms. Allocated memory was 146.3 MB in the beginning and 305.7 MB in the end (delta: 159.4 MB). Free memory was 104.0 MB in the beginning and 194.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 161.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,528 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 437.01 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 181.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,532 INFO L168 Benchmark]: Boogie Preprocessor took 43.12 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,532 INFO L168 Benchmark]: RCFGBuilder took 557.77 ms. Allocated memory is still 203.4 MB. Free memory was 179.3 MB in the beginning and 154.5 MB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,533 INFO L168 Benchmark]: TraceAbstraction took 283666.13 ms. Allocated memory was 203.4 MB in the beginning and 305.7 MB in the end (delta: 102.2 MB). Free memory was 153.8 MB in the beginning and 194.4 MB in the end (delta: -40.6 MB). Peak memory consumption was 154.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:12,543 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 437.01 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.5 MB in the beginning and 181.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.12 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 179.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 557.77 ms. Allocated memory is still 203.4 MB. Free memory was 179.3 MB in the beginning and 154.5 MB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283666.13 ms. Allocated memory was 203.4 MB in the beginning and 305.7 MB in the end (delta: 102.2 MB). Free memory was 153.8 MB in the beginning and 194.4 MB in the end (delta: -40.6 MB). Peak memory consumption was 154.6 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[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,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: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) || (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 13:11:12,561 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,561 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,562 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] [2020-07-20 13:11:12,562 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[mulflt_~b,QUANTIFIED] Derived loop invariant: (0 == __retres10 || (b % 4294967296 <= \old(a) % 4294967296 && (\exists mulflt_~b : int :: !(0 == mulflt_~b % 4294967296) && mulflt_~b % 4294967296 <= \old(a) % 4294967296))) && (((b == \old(a) || a == \old(a)) && \old(a) % 4294967296 < \old(b) % 4294967296) || (a == \old(a) && b == \old(b))) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 <= 0) && (!(1 == \old(m)) || m % 4294967296 < 16777216)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 281.4s, OverallIterations: 19, TraceHistogramMax: 24, AutomataDifference: 268.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1349 SDtfs, 2838 SDslu, 6394 SDs, 0 SdLazy, 3239 SolverSat, 377 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 17.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2379 GetRequests, 2073 SyntacticMatches, 10 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 252.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=16, 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, 19 MinimizatonAttempts, 731 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 211 PreInvPairs, 682 NumberOfFragments, 153 HoareAnnotationTreeSize, 211 FomulaSimplifications, 6411 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 18 FomulaSimplificationsInter, 8032 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 1666 NumberOfCodeBlocks, 1130 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2171 ConstructedInterpolants, 6 QuantifiedInterpolants, 485241 SizeOfPredicates, 36 NumberOfNonLiveVariables, 3599 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 6502/9058 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...