/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:54:02,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:54:02,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:54:02,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:54:02,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:54:02,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:54:02,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:54:02,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:54:02,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:54:02,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:54:02,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:54:02,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:54:02,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:54:02,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:54:02,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:54:02,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:54:02,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:54:02,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:54:02,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:54:02,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:54:02,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:54:02,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:54:02,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:54:02,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:54:02,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:54:02,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:54:02,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:54:02,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:54:02,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:54:02,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 11:54:02,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:54:02,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:54:02,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:54:02,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:54:02,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:54:02,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:54:02,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:54:02,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:54:02,351 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:54:02,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:54:02,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:54:02,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:54:02,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:54:02,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:54:02,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:54:02,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:54:02,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:54:02,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:54:02,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:54:02,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:54:02,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:54:02,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:54:02,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:54:02,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:54:02,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:54:02,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:54:02,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:54:02,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:54:02,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:54:02,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:54:02,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:02,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:54:02,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:54:02,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:54:02,734 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:54:02,760 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:54:02,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:54:02,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:54:02,771 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:54:02,773 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-21 11:54:02,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28cb3c6a/d0a13fc5f8b840929f14ba1d4fcdbc8a/FLAG45c8bba89 [2020-07-21 11:54:03,435 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:54:03,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-21 11:54:03,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28cb3c6a/d0a13fc5f8b840929f14ba1d4fcdbc8a/FLAG45c8bba89 [2020-07-21 11:54:03,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28cb3c6a/d0a13fc5f8b840929f14ba1d4fcdbc8a [2020-07-21 11:54:03,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:54:03,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:54:03,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:54:03,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:54:03,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:54:03,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:54:03" (1/1) ... [2020-07-21 11:54:03,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dde2acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:03, skipping insertion in model container [2020-07-21 11:54:03,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:54:03" (1/1) ... [2020-07-21 11:54:03,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:54:03,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:54:04,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:54:04,054 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:54:04,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:54:04,087 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:54:04,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04 WrapperNode [2020-07-21 11:54:04,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:54:04,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:54:04,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:54:04,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:54:04,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:54:04,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:54:04,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:54:04,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:54:04,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:54:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:54:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:54:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:54:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:54:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:54:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:54:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:54:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:54:04,525 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:54:04,525 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:54:04,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:54:04 BoogieIcfgContainer [2020-07-21 11:54:04,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:54:04,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:54:04,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:54:04,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:54:04,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:54:03" (1/3) ... [2020-07-21 11:54:04,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef7ecc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:54:04, skipping insertion in model container [2020-07-21 11:54:04,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (2/3) ... [2020-07-21 11:54:04,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef7ecc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:54:04, skipping insertion in model container [2020-07-21 11:54:04,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:54:04" (3/3) ... [2020-07-21 11:54:04,549 INFO L109 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2020-07-21 11:54:04,562 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:54:04,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:54:04,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:54:04,619 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:54:04,620 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:54:04,620 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:54:04,620 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:54:04,620 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:54:04,620 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:54:04,620 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:54:04,620 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:54:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 11:54:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:54:04,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:04,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:04,649 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:04,655 INFO L82 PathProgramCache]: Analyzing trace with hash -677001103, now seen corresponding path program 1 times [2020-07-21 11:54:04,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:04,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836913022] [2020-07-21 11:54:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:54:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:04,906 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:04,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:54:04,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836913022] [2020-07-21 11:54:04,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:54:04,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:54:04,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731441295] [2020-07-21 11:54:04,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:54:04,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:54:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:54:04,995 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-07-21 11:54:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:05,164 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-07-21 11:54:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:54:05,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-21 11:54:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:05,179 INFO L225 Difference]: With dead ends: 41 [2020-07-21 11:54:05,180 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 11:54:05,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:54:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 11:54:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 11:54:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 11:54:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 11:54:05,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 11:54:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:05,245 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 11:54:05,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:54:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 11:54:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:54:05,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:05,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:05,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:05,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:05,464 INFO L82 PathProgramCache]: Analyzing trace with hash 523340046, now seen corresponding path program 1 times [2020-07-21 11:54:05,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:05,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062178457] [2020-07-21 11:54:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:54:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:05,576 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:05,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:05,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:05,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062178457] [2020-07-21 11:54:05,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:05,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 11:54:05,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98020620] [2020-07-21 11:54:05,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 11:54:05,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 11:54:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:54:05,735 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-07-21 11:54:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:05,967 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 11:54:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:54:05,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-07-21 11:54:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:05,969 INFO L225 Difference]: With dead ends: 22 [2020-07-21 11:54:05,970 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 11:54:05,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:54:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 11:54:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 11:54:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 11:54:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-21 11:54:05,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-07-21 11:54:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:05,980 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-21 11:54:05,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 11:54:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-21 11:54:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:54:06,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:06,002 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:06,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:06,217 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1555818862, now seen corresponding path program 2 times [2020-07-21 11:54:06,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:06,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904003957] [2020-07-21 11:54:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 11:54:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:06,341 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:06,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:06,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:06,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904003957] [2020-07-21 11:54:06,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:06,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 11:54:06,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11441888] [2020-07-21 11:54:06,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:54:06,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:06,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:54:06,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:54:06,552 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-07-21 11:54:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:07,053 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-07-21 11:54:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:54:07,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-21 11:54:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:07,054 INFO L225 Difference]: With dead ends: 26 [2020-07-21 11:54:07,055 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 11:54:07,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:54:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 11:54:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 11:54:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 11:54:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 11:54:07,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-07-21 11:54:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:07,064 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 11:54:07,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:54:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 11:54:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:54:07,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:07,066 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:07,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:07,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 399696430, now seen corresponding path program 3 times [2020-07-21 11:54:07,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:07,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259248290] [2020-07-21 11:54:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:07,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-21 11:54:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:07,505 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:07,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:07,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259248290] [2020-07-21 11:54:07,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:07,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 11:54:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724997904] [2020-07-21 11:54:07,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 11:54:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 11:54:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:54:07,921 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 22 states. [2020-07-21 11:54:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:09,179 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-07-21 11:54:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 11:54:09,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-07-21 11:54:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:09,183 INFO L225 Difference]: With dead ends: 34 [2020-07-21 11:54:09,183 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 11:54:09,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 11:54:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 11:54:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 11:54:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 11:54:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-21 11:54:09,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2020-07-21 11:54:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:09,205 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-21 11:54:09,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 11:54:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-21 11:54:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:54:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:09,207 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:09,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:09,422 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -852380754, now seen corresponding path program 4 times [2020-07-21 11:54:09,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:09,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215570677] [2020-07-21 11:54:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:09,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-21 11:54:09,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:09,817 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:09,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:09,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:10,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215570677] [2020-07-21 11:54:10,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:10,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2020-07-21 11:54:10,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132012517] [2020-07-21 11:54:10,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-21 11:54:10,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-21 11:54:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 11:54:10,847 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 38 states. [2020-07-21 11:54:11,822 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 11:54:12,109 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-07-21 11:54:12,338 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 11:54:12,569 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-07-21 11:54:12,772 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:54:14,930 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 11:54:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:14,940 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-07-21 11:54:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-21 11:54:14,941 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 27 [2020-07-21 11:54:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:14,942 INFO L225 Difference]: With dead ends: 50 [2020-07-21 11:54:14,943 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 11:54:14,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1192, Invalid=3920, Unknown=0, NotChecked=0, Total=5112 [2020-07-21 11:54:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 11:54:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 11:54:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:54:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-07-21 11:54:14,959 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 27 [2020-07-21 11:54:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:14,959 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-07-21 11:54:14,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-21 11:54:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-07-21 11:54:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 11:54:14,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:14,961 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:15,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:15,175 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2114791762, now seen corresponding path program 5 times [2020-07-21 11:54:15,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:15,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479190682] [2020-07-21 11:54:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:15,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 132 conjunts are in the unsatisfiable core [2020-07-21 11:54:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:16,306 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:16,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:19,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479190682] [2020-07-21 11:54:19,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:19,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 70 [2020-07-21 11:54:19,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527896223] [2020-07-21 11:54:19,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-21 11:54:19,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-21 11:54:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=3728, Unknown=0, NotChecked=0, Total=4830 [2020-07-21 11:54:19,885 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 70 states. [2020-07-21 11:54:23,006 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-21 11:54:23,656 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 136 [2020-07-21 11:54:24,371 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 11:54:24,963 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 132 [2020-07-21 11:54:25,640 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 11:54:26,390 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-21 11:54:27,015 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 11:54:27,614 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-21 11:54:28,216 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 11:54:28,852 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 11:54:29,411 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 11:54:29,938 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 11:54:30,620 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 11:54:31,145 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-21 11:54:31,639 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 11:54:32,123 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 11:54:32,590 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:54:33,004 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 11:54:33,445 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 11:54:33,855 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 11:54:34,277 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:54:34,660 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:54:38,634 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-07-21 11:54:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:38,647 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2020-07-21 11:54:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-21 11:54:38,648 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 43 [2020-07-21 11:54:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:38,650 INFO L225 Difference]: With dead ends: 82 [2020-07-21 11:54:38,650 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 11:54:38,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=4408, Invalid=13952, Unknown=0, NotChecked=0, Total=18360 [2020-07-21 11:54:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 11:54:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 11:54:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:54:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-07-21 11:54:38,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 43 [2020-07-21 11:54:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:38,679 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-07-21 11:54:38,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-21 11:54:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-07-21 11:54:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-21 11:54:38,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:38,682 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:38,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:38,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1115480914, now seen corresponding path program 6 times [2020-07-21 11:54:38,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:38,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962605255] [2020-07-21 11:54:38,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:38,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 260 conjunts are in the unsatisfiable core [2020-07-21 11:54:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:43,142 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:43,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962605255] [2020-07-21 11:54:59,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:59,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 134 [2020-07-21 11:54:59,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945338160] [2020-07-21 11:54:59,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-21 11:54:59,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-21 11:54:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4238, Invalid=13584, Unknown=0, NotChecked=0, Total=17822 [2020-07-21 11:54:59,550 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 134 states. [2020-07-21 11:55:13,753 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 390 [2020-07-21 11:55:15,942 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 391 DAG size of output: 264 [2020-07-21 11:55:19,398 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 11:55:21,393 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 386 DAG size of output: 260 [2020-07-21 11:55:24,730 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 376 [2020-07-21 11:55:28,300 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 370 [2020-07-21 11:55:31,663 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 364 [2020-07-21 11:55:35,043 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 358 [2020-07-21 11:55:38,490 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 11:55:41,657 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 346 [2020-07-21 11:55:45,105 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 340 [2020-07-21 11:55:48,613 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 334 [2020-07-21 11:55:52,159 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 328 [2020-07-21 11:55:55,424 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 11:55:58,853 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 316 [2020-07-21 11:56:02,399 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 310 [2020-07-21 11:56:05,872 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 11:56:09,279 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 298 [2020-07-21 11:56:12,765 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 292 [2020-07-21 11:56:16,283 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 286 [2020-07-21 11:56:19,824 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 280 [2020-07-21 11:56:23,434 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 274 [2020-07-21 11:56:26,645 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-21 11:56:30,303 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 262 [2020-07-21 11:56:34,003 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 256 [2020-07-21 11:56:37,686 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 250 [2020-07-21 11:56:41,379 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 11:56:44,759 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 238 [2020-07-21 11:56:48,496 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 11:56:52,298 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 226 [2020-07-21 11:56:56,054 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 220 [2020-07-21 11:56:59,744 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 11:57:03,235 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-21 11:57:06,920 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 11:57:10,564 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-21 11:57:14,162 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 11:57:17,759 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 11:57:21,025 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-21 11:57:24,508 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 11:57:27,962 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-21 11:57:31,303 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 11:57:33,597 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 11:57:35,817 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 11:57:37,918 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 11:57:39,989 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 11:57:42,051 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-21 11:57:44,006 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 11:57:46,022 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 11:57:48,059 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:57:49,963 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 11:57:51,838 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 11:57:53,618 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 11:57:55,363 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:57:57,028 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:57:58,619 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 11:58:00,081 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 11:58:01,467 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:58:02,806 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 11:58:04,075 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 11:58:05,266 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:58:06,385 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 11:58:07,432 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 11:58:16,626 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-21 11:58:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:58:16,651 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2020-07-21 11:58:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-07-21 11:58:16,654 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 75 [2020-07-21 11:58:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:58:16,657 INFO L225 Difference]: With dead ends: 146 [2020-07-21 11:58:16,657 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 11:58:16,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8696 ImplicationChecksByTransitivity, 207.4s TimeCoverageRelationStatistics Valid=16984, Invalid=52448, Unknown=0, NotChecked=0, Total=69432 [2020-07-21 11:58:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 11:58:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-07-21 11:58:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 11:58:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-07-21 11:58:16,729 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 75 [2020-07-21 11:58:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:58:16,730 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-07-21 11:58:16,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-21 11:58:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-07-21 11:58:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-21 11:58:16,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:58:16,735 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:58:16,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:58:16,937 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:58:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:58:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -858019666, now seen corresponding path program 7 times [2020-07-21 11:58:16,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:58:16,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235824051] [2020-07-21 11:58:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:58:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:58:17,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 516 conjunts are in the unsatisfiable core [2020-07-21 11:58:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:58:48,458 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:58:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:58:49,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:58:50,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:01:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:01:31,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235824051] [2020-07-21 12:01:31,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:01:31,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 262 [2020-07-21 12:01:31,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543349660] [2020-07-21 12:01:31,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 262 states [2020-07-21 12:01:31,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:01:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2020-07-21 12:01:31,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16654, Invalid=51728, Unknown=0, NotChecked=0, Total=68382 [2020-07-21 12:01:31,742 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 262 states. [2020-07-21 12:04:45,684 WARN L193 SmtUtils]: Spent 9.24 s on a formula simplification that was a NOOP. DAG size: 774 [2020-07-21 12:04:59,921 WARN L193 SmtUtils]: Spent 11.48 s on a formula simplification. DAG size of input: 775 DAG size of output: 520 [2020-07-21 12:06:16,879 WARN L193 SmtUtils]: Spent 12.75 s on a formula simplification that was a NOOP. DAG size: 766 [2020-07-21 12:06:31,258 WARN L193 SmtUtils]: Spent 12.60 s on a formula simplification. DAG size of input: 770 DAG size of output: 516 [2020-07-21 12:07:49,342 WARN L193 SmtUtils]: Spent 12.46 s on a formula simplification that was a NOOP. DAG size: 760