/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/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:58:16,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:58:16,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:58:17,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:58:17,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:58:17,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:58:17,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:58:17,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:58:17,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:58:17,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:58:17,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:58:17,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:58:17,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:58:17,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:58:17,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:58:17,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:58:17,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:58:17,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:58:17,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:58:17,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:58:17,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:58:17,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:58:17,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:58:17,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:58:17,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:58:17,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:58:17,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:58:17,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:58:17,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:58:17,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:58:17,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:58:17,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:58:17,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:58:17,050 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:58:17,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:58:17,051 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:58:17,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:58:17,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:58:17,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:58:17,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:58:17,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:58:17,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:58:17,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:58:17,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:58:17,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:58:17,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:58:17,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:58:17,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:58:17,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:58:17,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:58:17,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:58:17,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:58:17,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:58:17,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:58:17,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:58:17,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:17,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:58:17,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:58:17,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:58:17,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:58:17,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:58:17,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:58:17,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:58:17,362 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:58:17,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 10:58:17,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1af23d44/1f57b0d31f1c4491ba3aef3364b97a0e/FLAGaab7a2193 [2020-07-21 10:58:17,806 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:58:17,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 10:58:17,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1af23d44/1f57b0d31f1c4491ba3aef3364b97a0e/FLAGaab7a2193 [2020-07-21 10:58:18,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1af23d44/1f57b0d31f1c4491ba3aef3364b97a0e [2020-07-21 10:58:18,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:58:18,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:58:18,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:58:18,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:58:18,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:58:18,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b27e48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18, skipping insertion in model container [2020-07-21 10:58:18,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:58:18,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:58:18,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:58:18,442 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:58:18,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:58:18,469 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:58:18,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18 WrapperNode [2020-07-21 10:58:18,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:58:18,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:58:18,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:58:18,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:58:18,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... [2020-07-21 10:58:18,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:58:18,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:58:18,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:58:18,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:58:18,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:58:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:58:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:58:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:58:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:58:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:58:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:58:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:58:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:58:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:58:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:58:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:58:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:58:18,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:58:18,985 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:58:18,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:58:18 BoogieIcfgContainer [2020-07-21 10:58:18,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:58:18,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:58:18,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:58:18,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:58:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:58:18" (1/3) ... [2020-07-21 10:58:18,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36aa6437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:58:18, skipping insertion in model container [2020-07-21 10:58:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:58:18" (2/3) ... [2020-07-21 10:58:18,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36aa6437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:58:18, skipping insertion in model container [2020-07-21 10:58:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:58:18" (3/3) ... [2020-07-21 10:58:18,998 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-21 10:58:19,009 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:58:19,017 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:58:19,031 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:58:19,056 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:58:19,056 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:58:19,057 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:58:19,057 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:58:19,057 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:58:19,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:58:19,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:58:19,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:58:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:58:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:58:19,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:19,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:19,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:19,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:58:19,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:19,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866322455] [2020-07-21 10:58:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:58:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:19,312 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 10:58:19,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:58:19,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866322455] [2020-07-21 10:58:19,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:58:19,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:58:19,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267007371] [2020-07-21 10:58:19,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:58:19,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:58:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:58:19,341 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:58:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:19,441 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:58:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:58:19,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:58:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:19,454 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:58:19,454 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:58:19,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:58:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:58:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:58:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:58:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:58:19,505 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:58:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:19,505 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:58:19,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:58:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:58:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:58:19,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:19,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:19,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:19,722 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:58:19,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:19,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176846305] [2020-07-21 10:58:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:58:19,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:19,787 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 10:58:19,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:58:19,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176846305] [2020-07-21 10:58:19,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:58:19,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:58:19,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90786252] [2020-07-21 10:58:19,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:58:19,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:58:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:58:19,795 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:58:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:19,871 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:58:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:58:19,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:58:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:19,874 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:58:19,874 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:58:19,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:58:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:58:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:58:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:58:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:58:19,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:58:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:19,887 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:58:19,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:58:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:58:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:58:19,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:19,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:20,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:20,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:58:20,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:20,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010717915] [2020-07-21 10:58:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:20,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:58:20,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:58:20,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:20,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:58:20,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010717915] [2020-07-21 10:58:20,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:20,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:58:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129036650] [2020-07-21 10:58:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:58:20,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:58:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:58:20,435 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:58:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:20,549 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:58:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:58:20,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:58:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:20,552 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:58:20,552 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:58:20,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:58:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:58:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:58:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:58:20,565 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:58:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:20,567 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:58:20,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:58:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:58:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:58:20,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:20,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:20,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:20,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:58:20,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:20,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735332371] [2020-07-21 10:58:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:58:20,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:58:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:21,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:58:21,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735332371] [2020-07-21 10:58:21,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:21,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:58:21,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451437807] [2020-07-21 10:58:21,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:58:21,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:58:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:58:21,072 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:58:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:21,184 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:58:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:58:21,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:58:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:21,187 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:58:21,187 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:58:21,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:58:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:58:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:58:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:58:21,197 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:58:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:21,198 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:58:21,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:58:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:58:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:58:21,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:21,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:21,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:21,416 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:21,416 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:58:21,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:21,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657944435] [2020-07-21 10:58:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:58:21,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:21,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:58:21,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657944435] [2020-07-21 10:58:21,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:21,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:58:21,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599506536] [2020-07-21 10:58:21,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:58:21,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:58:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:21,936 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:58:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:22,113 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:58:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:22,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:58:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:22,116 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:58:22,116 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:58:22,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:58:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:58:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:58:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:58:22,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:58:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:22,128 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:58:22,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:58:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:58:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:58:22,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:22,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:22,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:22,335 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:58:22,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:22,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265537787] [2020-07-21 10:58:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:58:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:58:22,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:22,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:58:22,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265537787] [2020-07-21 10:58:22,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:22,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:58:22,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913860339] [2020-07-21 10:58:22,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:58:22,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:58:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:58:22,717 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:58:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:22,888 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:58:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:58:22,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:58:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:22,895 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:58:22,895 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:58:22,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:58:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:58:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:58:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:58:22,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:58:22,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:22,915 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:58:22,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:58:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:58:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:58:22,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:22,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:23,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:23,143 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:58:23,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:23,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314661881] [2020-07-21 10:58:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:58:23,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:23,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:23,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314661881] [2020-07-21 10:58:23,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:23,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:58:23,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959127847] [2020-07-21 10:58:23,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:58:23,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:58:23,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:23,835 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:58:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:24,032 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:58:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:24,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:58:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:24,035 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:58:24,036 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:58:24,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:58:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:58:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:24,047 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:58:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:24,047 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:24,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:58:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:58:24,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:24,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:24,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:24,256 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:58:24,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:24,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393309375] [2020-07-21 10:58:24,259 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 10:58:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:58:24,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:24,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:58:24,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393309375] [2020-07-21 10:58:24,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:24,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:58:24,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079403812] [2020-07-21 10:58:24,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:58:24,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:58:24,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:58:24,880 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 10:58:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:25,089 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:58:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:25,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 10:58:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:25,093 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:58:25,093 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:58:25,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:58:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:58:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:58:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:58:25,105 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:58:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:25,105 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:58:25,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:58:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:58:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:58:25,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:25,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:25,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:25,321 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:58:25,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:25,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954771975] [2020-07-21 10:58:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:58:25,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:26,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:58:26,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954771975] [2020-07-21 10:58:26,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:26,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:58:26,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266061463] [2020-07-21 10:58:26,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:58:26,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:58:26,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:58:26,345 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 10:58:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:26,571 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:58:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:26,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 10:58:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:26,578 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:58:26,578 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:58:26,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:26,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:58:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:58:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:58:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:58:26,592 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:58:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:26,593 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:58:26,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:58:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:58:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:58:26,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:26,595 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:26,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:26,809 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:58:26,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:26,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442600554] [2020-07-21 10:58:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 10:58:26,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:27,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 10:58:27,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442600554] [2020-07-21 10:58:27,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:27,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:58:27,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348313304] [2020-07-21 10:58:27,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:58:27,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:58:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:58:27,897 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 10:58:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:28,125 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 10:58:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:28,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 10:58:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:28,127 INFO L225 Difference]: With dead ends: 76 [2020-07-21 10:58:28,127 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 10:58:28,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 10:58:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 10:58:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:58:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:58:28,140 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 10:58:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:28,140 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:58:28,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:58:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:58:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 10:58:28,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:28,144 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:28,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:28,358 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 10:58:28,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:28,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065284205] [2020-07-21 10:58:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 10:58:28,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:29,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:29,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 10:58:30,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065284205] [2020-07-21 10:58:30,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:30,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:58:30,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90303072] [2020-07-21 10:58:30,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:58:30,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:30,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:58:30,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:30,226 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 10:58:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:30,479 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 10:58:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:30,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 10:58:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:30,482 INFO L225 Difference]: With dead ends: 81 [2020-07-21 10:58:30,482 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 10:58:30,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:58:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 10:58:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 10:58:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:58:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:58:30,505 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 10:58:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:30,506 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:58:30,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:58:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:58:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:30,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:30,509 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:30,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:30,710 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 10:58:30,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:30,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942538108] [2020-07-21 10:58:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 10:58:30,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:31,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:31,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:31,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 10:58:32,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942538108] [2020-07-21 10:58:32,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:32,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:58:32,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981297306] [2020-07-21 10:58:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:58:32,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:58:32,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:58:32,263 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 10:58:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:32,552 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 10:58:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:32,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 10:58:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:32,561 INFO L225 Difference]: With dead ends: 86 [2020-07-21 10:58:32,561 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 10:58:32,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:58:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 10:58:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 10:58:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:58:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:58:32,583 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 10:58:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:32,584 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:58:32,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:58:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:58:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 10:58:32,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:32,590 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:32,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:32,805 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 10:58:32,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:32,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264478095] [2020-07-21 10:58:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:58:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 10:58:33,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:34,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:34,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 10:58:35,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264478095] [2020-07-21 10:58:35,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:35,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 10:58:35,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770708180] [2020-07-21 10:58:35,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:58:35,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:58:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:35,375 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 10:58:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:35,769 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 10:58:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:58:35,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 10:58:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:35,772 INFO L225 Difference]: With dead ends: 91 [2020-07-21 10:58:35,773 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 10:58:35,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:58:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 10:58:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 10:58:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:58:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:58:35,783 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 10:58:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:35,784 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:58:35,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:58:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:58:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:58:35,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:35,787 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:36,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:36,002 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 10:58:36,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:36,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892600202] [2020-07-21 10:58:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 10:58:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:36,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:58:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 10:58:36,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:37,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:37,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:37,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 10:58:38,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892600202] [2020-07-21 10:58:38,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:38,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:58:38,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697799106] [2020-07-21 10:58:38,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:58:38,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:38,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:58:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:38,447 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 10:58:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:38,762 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 10:58:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:58:38,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 10:58:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:38,767 INFO L225 Difference]: With dead ends: 96 [2020-07-21 10:58:38,768 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 10:58:38,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:58:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 10:58:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 10:58:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:58:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:58:38,784 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 10:58:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:38,785 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:58:38,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:58:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:58:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 10:58:38,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:38,792 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:39,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:39,006 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 10:58:39,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:39,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672074766] [2020-07-21 10:58:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:39,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:58:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 10:58:39,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:41,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:41,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:42,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 10:58:43,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672074766] [2020-07-21 10:58:43,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:43,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:58:43,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071358404] [2020-07-21 10:58:43,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:58:43,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:58:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:43,082 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 10:58:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:43,538 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 10:58:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:58:43,539 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 10:58:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:43,542 INFO L225 Difference]: With dead ends: 101 [2020-07-21 10:58:43,542 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 10:58:43,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:58:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 10:58:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 10:58:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:58:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 10:58:43,554 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 10:58:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:43,555 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 10:58:43,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:58:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 10:58:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 10:58:43,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:43,558 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:43,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:43,772 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 10:58:43,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:43,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175056010] [2020-07-21 10:58:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:58:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 10:58:44,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:45,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:45,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 10:58:46,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175056010] [2020-07-21 10:58:46,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:46,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:58:47,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280307960] [2020-07-21 10:58:47,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:58:47,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:58:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:47,002 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 10:58:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:47,423 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 10:58:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:58:47,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 10:58:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:47,429 INFO L225 Difference]: With dead ends: 129 [2020-07-21 10:58:47,430 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 10:58:47,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:58:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 10:58:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 10:58:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:58:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 10:58:47,462 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 10:58:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:47,465 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 10:58:47,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:58:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 10:58:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 10:58:47,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:47,471 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:47,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:47,685 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 10:58:47,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:47,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451388413] [2020-07-21 10:58:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:58:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 10:58:48,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:49,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:49,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 10:58:50,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451388413] [2020-07-21 10:58:50,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:50,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:58:50,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828448689] [2020-07-21 10:58:50,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:50,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:50,365 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 10:58:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:50,706 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 10:58:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:50,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 10:58:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:50,712 INFO L225 Difference]: With dead ends: 139 [2020-07-21 10:58:50,712 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 10:58:50,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:58:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 10:58:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 10:58:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 10:58:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 10:58:50,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 10:58:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:50,734 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 10:58:50,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 10:58:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 10:58:50,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:50,740 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:50,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:50,954 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 10:58:50,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:50,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053854931] [2020-07-21 10:58:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:58:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-21 10:58:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:53,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:54,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:55,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 10:58:56,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053854931] [2020-07-21 10:58:56,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:56,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:58:56,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240301596] [2020-07-21 10:58:56,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:58:56,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:58:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:58:56,017 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 10:58:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:56,519 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 10:58:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:58:56,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 10:58:56,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:56,523 INFO L225 Difference]: With dead ends: 166 [2020-07-21 10:58:56,523 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:58:56,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:58:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:58:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 10:58:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 10:58:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 10:58:56,542 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 10:58:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:56,543 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 10:58:56,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:58:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 10:58:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 10:58:56,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:56,548 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:56,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:56,762 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:56,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-21 10:58:56,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:56,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808125882] [2020-07-21 10:58:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:58:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 10:58:57,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:58,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:58,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:59,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:00,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:00,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:00,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:00,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 10:59:00,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808125882] [2020-07-21 10:59:00,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:00,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:59:00,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553125355] [2020-07-21 10:59:00,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:59:00,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:59:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:00,452 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 10:59:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:00,845 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 10:59:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:59:00,846 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-21 10:59:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:00,851 INFO L225 Difference]: With dead ends: 167 [2020-07-21 10:59:00,851 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 10:59:00,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:59:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 10:59:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 10:59:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 10:59:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 10:59:00,867 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-21 10:59:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:00,868 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 10:59:00,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:59:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 10:59:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 10:59:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:00,872 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 23, 19, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:01,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:01,088 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1610364731, now seen corresponding path program 3 times [2020-07-21 10:59:01,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:01,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255520440] [2020-07-21 10:59:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:59:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 283 proven. 715 refuted. 0 times theorem prover too weak. 2766 trivial. 0 not checked. [2020-07-21 10:59:01,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:03,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:03,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 285 proven. 743 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2020-07-21 10:59:05,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255520440] [2020-07-21 10:59:05,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:05,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:59:05,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57750838] [2020-07-21 10:59:05,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:59:05,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:59:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:59:05,383 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-21 10:59:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:05,977 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-21 10:59:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:59:05,977 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2020-07-21 10:59:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:05,981 INFO L225 Difference]: With dead ends: 191 [2020-07-21 10:59:05,981 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 10:59:05,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 697 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:59:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 10:59:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-21 10:59:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 10:59:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-21 10:59:05,995 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 367 [2020-07-21 10:59:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:05,995 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-21 10:59:05,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:59:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-21 10:59:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 10:59:05,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:05,999 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 21, 21, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:06,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:06,213 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash -390845590, now seen corresponding path program 4 times [2020-07-21 10:59:06,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:06,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933426238] [2020-07-21 10:59:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 611 refuted. 0 times theorem prover too weak. 3247 trivial. 0 not checked. [2020-07-21 10:59:06,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:08,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 627 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2020-07-21 10:59:08,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933426238] [2020-07-21 10:59:08,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:08,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:08,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289401024] [2020-07-21 10:59:08,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:08,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:08,945 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-21 10:59:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:09,212 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-21 10:59:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:09,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 379 [2020-07-21 10:59:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:09,219 INFO L225 Difference]: With dead ends: 178 [2020-07-21 10:59:09,220 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 10:59:09,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 729 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 10:59:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-21 10:59:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 10:59:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 10:59:09,236 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 379 [2020-07-21 10:59:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:09,236 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 10:59:09,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 10:59:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 10:59:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:09,241 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 21, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:09,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:09,454 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1482231414, now seen corresponding path program 5 times [2020-07-21 10:59:09,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:09,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413715648] [2020-07-21 10:59:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 237 proven. 729 refuted. 0 times theorem prover too weak. 3590 trivial. 0 not checked. [2020-07-21 10:59:09,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:11,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:11,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:12,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 239 proven. 748 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2020-07-21 10:59:13,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413715648] [2020-07-21 10:59:13,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:13,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:59:13,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969757357] [2020-07-21 10:59:13,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:59:13,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:59:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:13,044 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 10:59:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:13,405 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 10:59:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:59:13,408 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 402 [2020-07-21 10:59:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:13,412 INFO L225 Difference]: With dead ends: 172 [2020-07-21 10:59:13,412 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 10:59:13,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 771 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:59:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 10:59:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 10:59:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 10:59:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 10:59:13,436 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 402 [2020-07-21 10:59:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:13,437 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 10:59:13,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:59:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 10:59:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 10:59:13,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:13,443 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:13,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:13,657 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1545328541, now seen corresponding path program 6 times [2020-07-21 10:59:13,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:13,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185548318] [2020-07-21 10:59:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 693 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 10:59:14,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:15,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:15,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 707 refuted. 0 times theorem prover too weak. 4709 trivial. 0 not checked. [2020-07-21 10:59:16,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185548318] [2020-07-21 10:59:16,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:16,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:16,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980248911] [2020-07-21 10:59:16,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:16,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:16,730 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 10:59:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:17,036 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 10:59:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:17,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 10:59:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:17,040 INFO L225 Difference]: With dead ends: 190 [2020-07-21 10:59:17,040 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 10:59:17,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 10:59:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 10:59:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 10:59:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 10:59:17,058 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 447 [2020-07-21 10:59:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:17,059 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 10:59:17,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 10:59:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 10:59:17,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:17,063 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 25, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 11, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:17,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:17,278 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash 725561814, now seen corresponding path program 7 times [2020-07-21 10:59:17,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:17,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48200137] [2020-07-21 10:59:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 277 proven. 586 refuted. 0 times theorem prover too weak. 3846 trivial. 0 not checked. [2020-07-21 10:59:17,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:19,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:19,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4709 backedges. 279 proven. 600 refuted. 0 times theorem prover too weak. 3830 trivial. 0 not checked. [2020-07-21 10:59:20,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48200137] [2020-07-21 10:59:20,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:20,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:20,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565527847] [2020-07-21 10:59:20,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:20,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:20,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:20,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:20,241 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 10:59:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:20,518 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-21 10:59:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:20,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 10:59:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:20,522 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:59:20,522 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 10:59:20,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 789 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 10:59:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-21 10:59:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 10:59:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-21 10:59:20,537 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 409 [2020-07-21 10:59:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:20,538 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-21 10:59:20,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-21 10:59:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2020-07-21 10:59:20,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:20,545 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 40, 40, 39, 34, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 20, 20, 19, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:20,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:20,759 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1438673481, now seen corresponding path program 8 times [2020-07-21 10:59:20,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:20,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446360711] [2020-07-21 10:59:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:59:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10990 backedges. 478 proven. 1316 refuted. 0 times theorem prover too weak. 9196 trivial. 0 not checked. [2020-07-21 10:59:21,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:24,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:24,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:25,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10990 backedges. 480 proven. 1344 refuted. 0 times theorem prover too weak. 9166 trivial. 0 not checked. [2020-07-21 10:59:26,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446360711] [2020-07-21 10:59:26,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:26,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:59:26,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122458488] [2020-07-21 10:59:26,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:59:26,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:59:26,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:59:26,688 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 21 states. [2020-07-21 10:59:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:27,162 INFO L93 Difference]: Finished difference Result 157 states and 311 transitions. [2020-07-21 10:59:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:59:27,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 614 [2020-07-21 10:59:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:27,167 INFO L225 Difference]: With dead ends: 157 [2020-07-21 10:59:27,167 INFO L226 Difference]: Without dead ends: 129 [2020-07-21 10:59:27,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1235 GetRequests, 1191 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:59:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-21 10:59:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-07-21 10:59:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 10:59:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 240 transitions. [2020-07-21 10:59:27,181 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 240 transitions. Word has length 614 [2020-07-21 10:59:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:27,182 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 240 transitions. [2020-07-21 10:59:27,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:59:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 240 transitions. [2020-07-21 10:59:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-07-21 10:59:27,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:27,187 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 25, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:27,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:27,402 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash -445793158, now seen corresponding path program 9 times [2020-07-21 10:59:27,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:27,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024959945] [2020-07-21 10:59:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 329 proven. 796 refuted. 0 times theorem prover too weak. 4863 trivial. 0 not checked. [2020-07-21 10:59:27,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:29,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:29,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:30,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:30,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:30,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:30,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 331 proven. 815 refuted. 0 times theorem prover too weak. 4842 trivial. 0 not checked. [2020-07-21 10:59:31,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024959945] [2020-07-21 10:59:31,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:31,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:59:31,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353794855] [2020-07-21 10:59:31,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:59:31,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:59:31,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:31,403 INFO L87 Difference]: Start difference. First operand 129 states and 240 transitions. Second operand 19 states. [2020-07-21 10:59:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:31,758 INFO L93 Difference]: Finished difference Result 172 states and 344 transitions. [2020-07-21 10:59:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:59:31,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 459 [2020-07-21 10:59:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:31,762 INFO L225 Difference]: With dead ends: 172 [2020-07-21 10:59:31,762 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 10:59:31,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 885 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:59:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 10:59:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-07-21 10:59:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-21 10:59:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2020-07-21 10:59:31,778 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 459 [2020-07-21 10:59:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:31,778 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2020-07-21 10:59:31,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:59:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2020-07-21 10:59:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-21 10:59:31,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:31,783 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:31,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:31,997 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1734245441, now seen corresponding path program 10 times [2020-07-21 10:59:31,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:31,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993731488] [2020-07-21 10:59:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 538 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-21 10:59:32,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:34,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:34,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 554 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2020-07-21 10:59:35,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993731488] [2020-07-21 10:59:35,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:35,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:35,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610774697] [2020-07-21 10:59:35,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:35,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:35,123 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand 17 states. [2020-07-21 10:59:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:35,394 INFO L93 Difference]: Finished difference Result 184 states and 375 transitions. [2020-07-21 10:59:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:35,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-07-21 10:59:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:35,399 INFO L225 Difference]: With dead ends: 184 [2020-07-21 10:59:35,399 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 10:59:35,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 757 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 10:59:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2020-07-21 10:59:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 10:59:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-21 10:59:35,415 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 393 [2020-07-21 10:59:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:35,415 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-21 10:59:35,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-21 10:59:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 10:59:35,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:35,420 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 31, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 14, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:35,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:35,635 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash 579920126, now seen corresponding path program 11 times [2020-07-21 10:59:35,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:35,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120479804] [2020-07-21 10:59:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:36,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6907 backedges. 267 proven. 629 refuted. 0 times theorem prover too weak. 6011 trivial. 0 not checked. [2020-07-21 10:59:36,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:37,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:37,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6907 backedges. 267 proven. 639 refuted. 0 times theorem prover too weak. 6001 trivial. 0 not checked. [2020-07-21 10:59:38,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120479804] [2020-07-21 10:59:38,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:38,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:59:38,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892671848] [2020-07-21 10:59:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:59:38,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:38,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:59:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:59:38,614 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 15 states. [2020-07-21 10:59:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:38,877 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-07-21 10:59:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:38,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 492 [2020-07-21 10:59:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:38,882 INFO L225 Difference]: With dead ends: 212 [2020-07-21 10:59:38,882 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 10:59:38,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 959 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:59:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 10:59:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2020-07-21 10:59:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 10:59:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-21 10:59:38,902 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 492 [2020-07-21 10:59:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:38,903 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-21 10:59:38,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:59:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-21 10:59:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 10:59:38,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:38,907 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:39,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:39,122 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 466030406, now seen corresponding path program 12 times [2020-07-21 10:59:39,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:39,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884640786] [2020-07-21 10:59:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 400 proven. 461 refuted. 0 times theorem prover too weak. 3793 trivial. 0 not checked. [2020-07-21 10:59:39,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:41,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4654 backedges. 402 proven. 475 refuted. 0 times theorem prover too weak. 3777 trivial. 0 not checked. [2020-07-21 10:59:42,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884640786] [2020-07-21 10:59:42,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:42,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:42,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917317827] [2020-07-21 10:59:42,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:42,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:42,258 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 17 states. [2020-07-21 10:59:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:42,555 INFO L93 Difference]: Finished difference Result 176 states and 378 transitions. [2020-07-21 10:59:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:42,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 407 [2020-07-21 10:59:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:42,559 INFO L225 Difference]: With dead ends: 176 [2020-07-21 10:59:42,559 INFO L226 Difference]: Without dead ends: 167 [2020-07-21 10:59:42,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 785 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-07-21 10:59:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2020-07-21 10:59:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 10:59:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 288 transitions. [2020-07-21 10:59:42,578 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 288 transitions. Word has length 407 [2020-07-21 10:59:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:42,578 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 288 transitions. [2020-07-21 10:59:42,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 288 transitions. [2020-07-21 10:59:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2020-07-21 10:59:42,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:42,585 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 34, 33, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 12, 12, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:42,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:42,799 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -294543426, now seen corresponding path program 13 times [2020-07-21 10:59:42,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364638256] [2020-07-21 10:59:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:59:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 515 proven. 991 refuted. 0 times theorem prover too weak. 8751 trivial. 0 not checked. [2020-07-21 10:59:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:46,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:46,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:46,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:46,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 519 proven. 1008 refuted. 0 times theorem prover too weak. 8730 trivial. 0 not checked. [2020-07-21 10:59:47,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364638256] [2020-07-21 10:59:47,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:47,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 10:59:47,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369926773] [2020-07-21 10:59:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:59:47,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:59:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:59:47,779 INFO L87 Difference]: Start difference. First operand 144 states and 288 transitions. Second operand 19 states. [2020-07-21 10:59:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:48,167 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2020-07-21 10:59:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:59:48,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 596 [2020-07-21 10:59:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:48,172 INFO L225 Difference]: With dead ends: 187 [2020-07-21 10:59:48,173 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 10:59:48,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1159 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:59:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 10:59:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 148. [2020-07-21 10:59:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 10:59:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 287 transitions. [2020-07-21 10:59:48,194 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 287 transitions. Word has length 596 [2020-07-21 10:59:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:48,194 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 287 transitions. [2020-07-21 10:59:48,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:59:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 287 transitions. [2020-07-21 10:59:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 10:59:48,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:48,202 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:48,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:48,416 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1049269986, now seen corresponding path program 14 times [2020-07-21 10:59:48,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:48,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925397542] [2020-07-21 10:59:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 422 proven. 487 refuted. 0 times theorem prover too weak. 4435 trivial. 0 not checked. [2020-07-21 10:59:49,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:50,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:50,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:50,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 424 proven. 499 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2020-07-21 10:59:51,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925397542] [2020-07-21 10:59:51,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:51,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:51,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946483996] [2020-07-21 10:59:51,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:51,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:51,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:51,789 INFO L87 Difference]: Start difference. First operand 148 states and 287 transitions. Second operand 17 states. [2020-07-21 10:59:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:52,073 INFO L93 Difference]: Finished difference Result 223 states and 508 transitions. [2020-07-21 10:59:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:52,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-21 10:59:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:52,083 INFO L225 Difference]: With dead ends: 223 [2020-07-21 10:59:52,083 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 10:59:52,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 10:59:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-07-21 10:59:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 10:59:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 264 transitions. [2020-07-21 10:59:52,104 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 264 transitions. Word has length 435 [2020-07-21 10:59:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:52,104 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 264 transitions. [2020-07-21 10:59:52,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 264 transitions. [2020-07-21 10:59:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 10:59:52,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:52,110 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:52,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:52,325 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1110471377, now seen corresponding path program 15 times [2020-07-21 10:59:52,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:52,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134282396] [2020-07-21 10:59:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:59:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 380 proven. 425 refuted. 0 times theorem prover too weak. 4927 trivial. 0 not checked. [2020-07-21 10:59:52,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:54,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:54,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5732 backedges. 380 proven. 437 refuted. 0 times theorem prover too weak. 4915 trivial. 0 not checked. [2020-07-21 10:59:55,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134282396] [2020-07-21 10:59:55,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:55,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:59:55,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698278528] [2020-07-21 10:59:55,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:59:55,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:59:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:59:55,184 INFO L87 Difference]: Start difference. First operand 140 states and 264 transitions. Second operand 15 states. [2020-07-21 10:59:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:55,445 INFO L93 Difference]: Finished difference Result 255 states and 641 transitions. [2020-07-21 10:59:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:59:55,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 450 [2020-07-21 10:59:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:55,451 INFO L225 Difference]: With dead ends: 255 [2020-07-21 10:59:55,451 INFO L226 Difference]: Without dead ends: 246 [2020-07-21 10:59:55,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 875 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:59:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-21 10:59:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 137. [2020-07-21 10:59:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 10:59:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 256 transitions. [2020-07-21 10:59:55,474 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 256 transitions. Word has length 450 [2020-07-21 10:59:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:55,475 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 256 transitions. [2020-07-21 10:59:55,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:59:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 256 transitions. [2020-07-21 10:59:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 10:59:55,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:55,480 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:55,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:55,693 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1914289404, now seen corresponding path program 16 times [2020-07-21 10:59:55,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:55,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204927181] [2020-07-21 10:59:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:59:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5320 backedges. 301 proven. 605 refuted. 0 times theorem prover too weak. 4414 trivial. 0 not checked. [2020-07-21 10:59:56,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:57,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:57,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:58,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5320 backedges. 303 proven. 617 refuted. 0 times theorem prover too weak. 4400 trivial. 0 not checked. [2020-07-21 10:59:59,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204927181] [2020-07-21 10:59:59,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:59,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:59:59,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628410017] [2020-07-21 10:59:59,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:59:59,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:59,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:59:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:59:59,060 INFO L87 Difference]: Start difference. First operand 137 states and 256 transitions. Second operand 17 states. [2020-07-21 10:59:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:59,337 INFO L93 Difference]: Finished difference Result 181 states and 364 transitions. [2020-07-21 10:59:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:59:59,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 434 [2020-07-21 10:59:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:59,342 INFO L225 Difference]: With dead ends: 181 [2020-07-21 10:59:59,342 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 10:59:59,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 839 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:59:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 10:59:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2020-07-21 10:59:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 10:59:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 264 transitions. [2020-07-21 10:59:59,357 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 264 transitions. Word has length 434 [2020-07-21 10:59:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:59,358 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 264 transitions. [2020-07-21 10:59:59,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:59:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 264 transitions. [2020-07-21 10:59:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2020-07-21 10:59:59,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:59,365 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 46, 46, 39, 38, 26, 26, 26, 26, 26, 26, 26, 23, 23, 23, 23, 23, 23, 23, 16, 14, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:59,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:59,580 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1861778944, now seen corresponding path program 17 times [2020-07-21 10:59:59,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:59,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204252524] [2020-07-21 10:59:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13408 backedges. 465 proven. 1310 refuted. 0 times theorem prover too weak. 11633 trivial. 0 not checked. [2020-07-21 11:00:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:03,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:04,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13408 backedges. 469 proven. 1327 refuted. 0 times theorem prover too weak. 11612 trivial. 0 not checked. [2020-07-21 11:00:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204252524] [2020-07-21 11:00:05,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:05,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:05,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15279195] [2020-07-21 11:00:05,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:05,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:05,154 INFO L87 Difference]: Start difference. First operand 140 states and 264 transitions. Second operand 19 states. [2020-07-21 11:00:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:05,607 INFO L93 Difference]: Finished difference Result 203 states and 420 transitions. [2020-07-21 11:00:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:05,608 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 678 [2020-07-21 11:00:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:05,613 INFO L225 Difference]: With dead ends: 203 [2020-07-21 11:00:05,613 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 11:00:05,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 1323 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 11:00:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 154. [2020-07-21 11:00:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 11:00:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 306 transitions. [2020-07-21 11:00:05,636 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 306 transitions. Word has length 678 [2020-07-21 11:00:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:05,637 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 306 transitions. [2020-07-21 11:00:05,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 306 transitions. [2020-07-21 11:00:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 11:00:05,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:05,645 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:05,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:05,861 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash 847754556, now seen corresponding path program 18 times [2020-07-21 11:00:05,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:05,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851503682] [2020-07-21 11:00:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:00:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 401 proven. 373 refuted. 0 times theorem prover too weak. 4570 trivial. 0 not checked. [2020-07-21 11:00:06,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:07,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:07,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:07,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 403 proven. 381 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2020-07-21 11:00:08,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851503682] [2020-07-21 11:00:08,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:08,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:00:08,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462056153] [2020-07-21 11:00:08,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:00:08,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:00:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:00:08,819 INFO L87 Difference]: Start difference. First operand 154 states and 306 transitions. Second operand 15 states. [2020-07-21 11:00:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:09,074 INFO L93 Difference]: Finished difference Result 232 states and 555 transitions. [2020-07-21 11:00:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:00:09,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 435 [2020-07-21 11:00:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:09,079 INFO L225 Difference]: With dead ends: 232 [2020-07-21 11:00:09,079 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 11:00:09,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 845 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:00:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 11:00:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-07-21 11:00:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 11:00:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 336 transitions. [2020-07-21 11:00:09,100 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 336 transitions. Word has length 435 [2020-07-21 11:00:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:09,100 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 336 transitions. [2020-07-21 11:00:09,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:00:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 336 transitions. [2020-07-21 11:00:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 11:00:09,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:09,105 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:09,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:09,321 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash 136816508, now seen corresponding path program 19 times [2020-07-21 11:00:09,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:09,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415353891] [2020-07-21 11:00:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:09,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:00:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 636 proven. 574 refuted. 0 times theorem prover too weak. 4118 trivial. 0 not checked. [2020-07-21 11:00:09,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:12,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:13,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 636 proven. 604 refuted. 0 times theorem prover too weak. 4088 trivial. 0 not checked. [2020-07-21 11:00:14,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415353891] [2020-07-21 11:00:14,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:14,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:00:14,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496501660] [2020-07-21 11:00:14,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:00:14,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:00:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:00:14,718 INFO L87 Difference]: Start difference. First operand 162 states and 336 transitions. Second operand 21 states. [2020-07-21 11:00:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:15,249 INFO L93 Difference]: Finished difference Result 213 states and 442 transitions. [2020-07-21 11:00:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:00:15,251 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 434 [2020-07-21 11:00:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:15,254 INFO L225 Difference]: With dead ends: 213 [2020-07-21 11:00:15,254 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 11:00:15,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 831 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:00:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 11:00:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 171. [2020-07-21 11:00:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 11:00:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 343 transitions. [2020-07-21 11:00:15,272 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 343 transitions. Word has length 434 [2020-07-21 11:00:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:15,272 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 343 transitions. [2020-07-21 11:00:15,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:00:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 343 transitions. [2020-07-21 11:00:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 11:00:15,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:15,277 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 29, 29, 25, 24, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 13, 11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:15,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:15,491 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash -303288560, now seen corresponding path program 20 times [2020-07-21 11:00:15,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:15,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127443805] [2020-07-21 11:00:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:00:16,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6060 backedges. 512 proven. 458 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2020-07-21 11:00:16,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:17,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6060 backedges. 516 proven. 468 refuted. 0 times theorem prover too weak. 5076 trivial. 0 not checked. [2020-07-21 11:00:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127443805] [2020-07-21 11:00:19,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:19,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:00:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873565487] [2020-07-21 11:00:19,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:00:19,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:00:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:00:19,192 INFO L87 Difference]: Start difference. First operand 171 states and 343 transitions. Second operand 17 states. [2020-07-21 11:00:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:19,497 INFO L93 Difference]: Finished difference Result 210 states and 428 transitions. [2020-07-21 11:00:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:19,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 458 [2020-07-21 11:00:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:19,500 INFO L225 Difference]: With dead ends: 210 [2020-07-21 11:00:19,500 INFO L226 Difference]: Without dead ends: 201 [2020-07-21 11:00:19,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 887 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:00:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-21 11:00:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 163. [2020-07-21 11:00:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:00:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 314 transitions. [2020-07-21 11:00:19,518 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 314 transitions. Word has length 458 [2020-07-21 11:00:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:19,519 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 314 transitions. [2020-07-21 11:00:19,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:00:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 314 transitions. [2020-07-21 11:00:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 11:00:19,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:19,525 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:19,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:19,739 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:19,740 INFO L82 PathProgramCache]: Analyzing trace with hash 73235576, now seen corresponding path program 21 times [2020-07-21 11:00:19,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:19,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173738709] [2020-07-21 11:00:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 594 proven. 623 refuted. 0 times theorem prover too weak. 5568 trivial. 0 not checked. [2020-07-21 11:00:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:22,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:23,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:24,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 594 proven. 650 refuted. 0 times theorem prover too weak. 5541 trivial. 0 not checked. [2020-07-21 11:00:24,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173738709] [2020-07-21 11:00:24,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:24,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 11:00:24,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107007578] [2020-07-21 11:00:24,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 11:00:24,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:24,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 11:00:24,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:00:24,478 INFO L87 Difference]: Start difference. First operand 163 states and 314 transitions. Second operand 20 states. [2020-07-21 11:00:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:24,937 INFO L93 Difference]: Finished difference Result 290 states and 718 transitions. [2020-07-21 11:00:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:24,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 488 [2020-07-21 11:00:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:24,944 INFO L225 Difference]: With dead ends: 290 [2020-07-21 11:00:24,944 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 11:00:24,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 943 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:00:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 11:00:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2020-07-21 11:00:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-21 11:00:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 372 transitions. [2020-07-21 11:00:24,968 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 372 transitions. Word has length 488 [2020-07-21 11:00:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:24,969 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 372 transitions. [2020-07-21 11:00:24,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 11:00:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 372 transitions. [2020-07-21 11:00:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-21 11:00:24,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:24,974 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 25, 25, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:25,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:25,189 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1319936905, now seen corresponding path program 22 times [2020-07-21 11:00:25,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:25,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298986938] [2020-07-21 11:00:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5052 backedges. 236 proven. 802 refuted. 0 times theorem prover too weak. 4014 trivial. 0 not checked. [2020-07-21 11:00:25,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:27,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:28,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5052 backedges. 244 proven. 815 refuted. 0 times theorem prover too weak. 3993 trivial. 0 not checked. [2020-07-21 11:00:29,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298986938] [2020-07-21 11:00:29,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:29,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:29,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693690097] [2020-07-21 11:00:29,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:29,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:29,585 INFO L87 Difference]: Start difference. First operand 177 states and 372 transitions. Second operand 19 states. [2020-07-21 11:00:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:30,065 INFO L93 Difference]: Finished difference Result 350 states and 941 transitions. [2020-07-21 11:00:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:30,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 423 [2020-07-21 11:00:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:30,071 INFO L225 Difference]: With dead ends: 350 [2020-07-21 11:00:30,071 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 11:00:30,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 813 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 11:00:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 174. [2020-07-21 11:00:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-21 11:00:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 352 transitions. [2020-07-21 11:00:30,096 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 352 transitions. Word has length 423 [2020-07-21 11:00:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:30,096 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 352 transitions. [2020-07-21 11:00:30,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 352 transitions. [2020-07-21 11:00:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-21 11:00:30,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:30,101 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:30,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:30,317 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash 794990763, now seen corresponding path program 23 times [2020-07-21 11:00:30,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:30,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222044967] [2020-07-21 11:00:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 277 proven. 686 refuted. 0 times theorem prover too weak. 3408 trivial. 0 not checked. [2020-07-21 11:00:31,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:32,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:33,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 281 proven. 705 refuted. 0 times theorem prover too weak. 3385 trivial. 0 not checked. [2020-07-21 11:00:34,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222044967] [2020-07-21 11:00:34,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:34,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:34,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765287974] [2020-07-21 11:00:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:34,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:34,662 INFO L87 Difference]: Start difference. First operand 174 states and 352 transitions. Second operand 19 states. [2020-07-21 11:00:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:35,092 INFO L93 Difference]: Finished difference Result 282 states and 630 transitions. [2020-07-21 11:00:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:35,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 395 [2020-07-21 11:00:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:35,097 INFO L225 Difference]: With dead ends: 282 [2020-07-21 11:00:35,097 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 11:00:35,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 757 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 11:00:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 174. [2020-07-21 11:00:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-21 11:00:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 339 transitions. [2020-07-21 11:00:35,118 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 339 transitions. Word has length 395 [2020-07-21 11:00:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:35,119 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 339 transitions. [2020-07-21 11:00:35,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 339 transitions. [2020-07-21 11:00:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 11:00:35,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:35,124 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 24, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:35,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:35,340 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 851689957, now seen corresponding path program 24 times [2020-07-21 11:00:35,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:35,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495077824] [2020-07-21 11:00:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:00:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5657 backedges. 453 proven. 481 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-21 11:00:36,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:37,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:38,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5657 backedges. 453 proven. 497 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-21 11:00:39,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495077824] [2020-07-21 11:00:39,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:39,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:00:39,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128712931] [2020-07-21 11:00:39,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:00:39,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:39,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:00:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:00:39,104 INFO L87 Difference]: Start difference. First operand 174 states and 339 transitions. Second operand 17 states. [2020-07-21 11:00:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:39,434 INFO L93 Difference]: Finished difference Result 237 states and 501 transitions. [2020-07-21 11:00:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:39,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-21 11:00:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:39,439 INFO L225 Difference]: With dead ends: 237 [2020-07-21 11:00:39,439 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 11:00:39,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:00:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 11:00:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 169. [2020-07-21 11:00:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-21 11:00:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 320 transitions. [2020-07-21 11:00:39,458 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 320 transitions. Word has length 447 [2020-07-21 11:00:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:39,459 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 320 transitions. [2020-07-21 11:00:39,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:00:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 320 transitions. [2020-07-21 11:00:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-07-21 11:00:39,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:39,464 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 36, 33, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 14, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:39,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:39,665 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:39,666 INFO L82 PathProgramCache]: Analyzing trace with hash 456609310, now seen corresponding path program 25 times [2020-07-21 11:00:39,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:39,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662197087] [2020-07-21 11:00:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:40,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10326 backedges. 602 proven. 937 refuted. 0 times theorem prover too weak. 8787 trivial. 0 not checked. [2020-07-21 11:00:40,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:43,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:43,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:44,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10326 backedges. 602 proven. 960 refuted. 0 times theorem prover too weak. 8764 trivial. 0 not checked. [2020-07-21 11:00:45,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662197087] [2020-07-21 11:00:45,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:45,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:45,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556866152] [2020-07-21 11:00:45,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:45,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:45,094 INFO L87 Difference]: Start difference. First operand 169 states and 320 transitions. Second operand 19 states. [2020-07-21 11:00:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:45,538 INFO L93 Difference]: Finished difference Result 230 states and 478 transitions. [2020-07-21 11:00:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:45,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 598 [2020-07-21 11:00:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:45,543 INFO L225 Difference]: With dead ends: 230 [2020-07-21 11:00:45,543 INFO L226 Difference]: Without dead ends: 212 [2020-07-21 11:00:45,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1163 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-21 11:00:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-07-21 11:00:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 11:00:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 311 transitions. [2020-07-21 11:00:45,561 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 311 transitions. Word has length 598 [2020-07-21 11:00:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:45,562 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 311 transitions. [2020-07-21 11:00:45,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 311 transitions. [2020-07-21 11:00:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 11:00:45,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:45,566 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 24, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:45,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:45,782 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1551144652, now seen corresponding path program 26 times [2020-07-21 11:00:45,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:45,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626647921] [2020-07-21 11:00:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:00:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4700 backedges. 661 proven. 206 refuted. 0 times theorem prover too weak. 3833 trivial. 0 not checked. [2020-07-21 11:00:46,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:47,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:47,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:48,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4700 backedges. 665 proven. 218 refuted. 0 times theorem prover too weak. 3817 trivial. 0 not checked. [2020-07-21 11:00:49,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626647921] [2020-07-21 11:00:49,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:49,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:00:49,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159156462] [2020-07-21 11:00:49,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:00:49,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:00:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:00:49,511 INFO L87 Difference]: Start difference. First operand 160 states and 311 transitions. Second operand 17 states. [2020-07-21 11:00:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:49,825 INFO L93 Difference]: Finished difference Result 239 states and 555 transitions. [2020-07-21 11:00:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:00:49,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 11:00:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:49,830 INFO L225 Difference]: With dead ends: 239 [2020-07-21 11:00:49,830 INFO L226 Difference]: Without dead ends: 224 [2020-07-21 11:00:49,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 789 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:00:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-21 11:00:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 193. [2020-07-21 11:00:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-21 11:00:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2020-07-21 11:00:49,850 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 409 [2020-07-21 11:00:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:49,851 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2020-07-21 11:00:49,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:00:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2020-07-21 11:00:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 11:00:49,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:49,857 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 30, 30, 24, 24, 19, 19, 19, 19, 19, 19, 19, 15, 15, 15, 15, 15, 15, 15, 15, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:50,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:50,071 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash 131528211, now seen corresponding path program 27 times [2020-07-21 11:00:50,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:50,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681357380] [2020-07-21 11:00:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:50,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:50,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 873 proven. 288 refuted. 0 times theorem prover too weak. 5199 trivial. 0 not checked. [2020-07-21 11:00:50,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:52,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:52,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:53,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:54,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 877 proven. 305 refuted. 0 times theorem prover too weak. 5178 trivial. 0 not checked. [2020-07-21 11:00:54,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681357380] [2020-07-21 11:00:54,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:54,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:00:54,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787125643] [2020-07-21 11:00:54,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:00:54,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:00:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:00:54,968 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand 19 states. [2020-07-21 11:00:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:55,369 INFO L93 Difference]: Finished difference Result 257 states and 603 transitions. [2020-07-21 11:00:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:00:55,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 469 [2020-07-21 11:00:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:55,375 INFO L225 Difference]: With dead ends: 257 [2020-07-21 11:00:55,375 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 11:00:55,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 905 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:00:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 11:00:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 199. [2020-07-21 11:00:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-21 11:00:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 408 transitions. [2020-07-21 11:00:55,394 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 408 transitions. Word has length 469 [2020-07-21 11:00:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:55,394 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 408 transitions. [2020-07-21 11:00:55,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:00:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 408 transitions. [2020-07-21 11:00:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 11:00:55,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:55,399 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 32, 32, 27, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:55,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:55,600 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1434113731, now seen corresponding path program 28 times [2020-07-21 11:00:55,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:55,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052624718] [2020-07-21 11:00:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:00:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:00:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6391 backedges. 628 proven. 562 refuted. 0 times theorem prover too weak. 5201 trivial. 0 not checked. [2020-07-21 11:00:56,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:58,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:59,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:00,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6391 backedges. 630 proven. 581 refuted. 0 times theorem prover too weak. 5180 trivial. 0 not checked. [2020-07-21 11:01:00,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052624718] [2020-07-21 11:01:00,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:00,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:01:00,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341661998] [2020-07-21 11:01:00,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:01:00,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:00,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:01:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:01:00,519 INFO L87 Difference]: Start difference. First operand 199 states and 408 transitions. Second operand 19 states. [2020-07-21 11:01:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:00,997 INFO L93 Difference]: Finished difference Result 239 states and 501 transitions. [2020-07-21 11:01:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:01:00,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 473 [2020-07-21 11:01:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:01,002 INFO L225 Difference]: With dead ends: 239 [2020-07-21 11:01:01,002 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 11:01:01,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 913 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:01:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 11:01:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 209. [2020-07-21 11:01:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-21 11:01:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 434 transitions. [2020-07-21 11:01:01,025 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 434 transitions. Word has length 473 [2020-07-21 11:01:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:01,026 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 434 transitions. [2020-07-21 11:01:01,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:01:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 434 transitions. [2020-07-21 11:01:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 11:01:01,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:01,032 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:01,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:01,233 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash 400759946, now seen corresponding path program 29 times [2020-07-21 11:01:01,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:01,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001427427] [2020-07-21 11:01:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:01:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 394 proven. 364 refuted. 0 times theorem prover too weak. 4594 trivial. 0 not checked. [2020-07-21 11:01:02,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:03,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:03,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:03,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:03,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:03,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:04,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:04,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 394 proven. 374 refuted. 0 times theorem prover too weak. 4584 trivial. 0 not checked. [2020-07-21 11:01:04,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001427427] [2020-07-21 11:01:04,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:04,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:01:04,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544414952] [2020-07-21 11:01:04,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:01:04,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:04,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:01:04,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:01:04,654 INFO L87 Difference]: Start difference. First operand 209 states and 434 transitions. Second operand 15 states. [2020-07-21 11:01:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:04,915 INFO L93 Difference]: Finished difference Result 251 states and 525 transitions. [2020-07-21 11:01:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:01:04,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 435 [2020-07-21 11:01:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:04,920 INFO L225 Difference]: With dead ends: 251 [2020-07-21 11:01:04,920 INFO L226 Difference]: Without dead ends: 242 [2020-07-21 11:01:04,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 845 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:01:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-21 11:01:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-07-21 11:01:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 11:01:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 423 transitions. [2020-07-21 11:01:04,939 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 423 transitions. Word has length 435 [2020-07-21 11:01:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:04,939 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 423 transitions. [2020-07-21 11:01:04,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:01:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 423 transitions. [2020-07-21 11:01:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 11:01:04,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:04,947 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:05,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:05,162 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:05,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1791481920, now seen corresponding path program 30 times [2020-07-21 11:01:05,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:05,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475759144] [2020-07-21 11:01:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:01:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6821 backedges. 696 proven. 335 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2020-07-21 11:01:06,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:07,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:07,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:08,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6821 backedges. 698 proven. 349 refuted. 0 times theorem prover too weak. 5774 trivial. 0 not checked. [2020-07-21 11:01:09,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475759144] [2020-07-21 11:01:09,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:09,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:01:09,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497309625] [2020-07-21 11:01:09,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:01:09,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:01:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:01:09,359 INFO L87 Difference]: Start difference. First operand 206 states and 423 transitions. Second operand 17 states. [2020-07-21 11:01:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:09,682 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-07-21 11:01:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:01:09,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 489 [2020-07-21 11:01:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:09,689 INFO L225 Difference]: With dead ends: 320 [2020-07-21 11:01:09,689 INFO L226 Difference]: Without dead ends: 305 [2020-07-21 11:01:09,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 949 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:01:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-21 11:01:09,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 198. [2020-07-21 11:01:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 11:01:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 396 transitions. [2020-07-21 11:01:09,721 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 396 transitions. Word has length 489 [2020-07-21 11:01:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:09,722 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 396 transitions. [2020-07-21 11:01:09,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:01:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 396 transitions. [2020-07-21 11:01:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 11:01:09,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:09,729 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:09,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:09,942 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash -556212885, now seen corresponding path program 31 times [2020-07-21 11:01:09,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:09,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748278884] [2020-07-21 11:01:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:01:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 583 proven. 222 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2020-07-21 11:01:10,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:11,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:12,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5706 backedges. 585 proven. 230 refuted. 0 times theorem prover too weak. 4891 trivial. 0 not checked. [2020-07-21 11:01:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748278884] [2020-07-21 11:01:13,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:13,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:01:13,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900128552] [2020-07-21 11:01:13,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:01:13,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:01:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:01:13,359 INFO L87 Difference]: Start difference. First operand 198 states and 396 transitions. Second operand 15 states. [2020-07-21 11:01:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:13,630 INFO L93 Difference]: Finished difference Result 342 states and 872 transitions. [2020-07-21 11:01:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:01:13,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 449 [2020-07-21 11:01:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:13,637 INFO L225 Difference]: With dead ends: 342 [2020-07-21 11:01:13,637 INFO L226 Difference]: Without dead ends: 327 [2020-07-21 11:01:13,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 873 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:01:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-21 11:01:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2020-07-21 11:01:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 11:01:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 409 transitions. [2020-07-21 11:01:13,668 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 409 transitions. Word has length 449 [2020-07-21 11:01:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:13,669 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 409 transitions. [2020-07-21 11:01:13,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:01:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 409 transitions. [2020-07-21 11:01:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-21 11:01:13,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:13,676 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:13,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:13,891 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2122481566, now seen corresponding path program 32 times [2020-07-21 11:01:13,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:13,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875834017] [2020-07-21 11:01:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:01:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 628 refuted. 0 times theorem prover too weak. 7747 trivial. 0 not checked. [2020-07-21 11:01:14,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:17,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:17,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:18,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:18,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:18,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:19,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1038 proven. 658 refuted. 0 times theorem prover too weak. 7717 trivial. 0 not checked. [2020-07-21 11:01:20,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875834017] [2020-07-21 11:01:20,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:20,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:01:20,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985340118] [2020-07-21 11:01:20,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:01:20,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:01:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:01:20,639 INFO L87 Difference]: Start difference. First operand 200 states and 409 transitions. Second operand 21 states. [2020-07-21 11:01:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:21,164 INFO L93 Difference]: Finished difference Result 268 states and 544 transitions. [2020-07-21 11:01:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:01:21,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 572 [2020-07-21 11:01:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:21,168 INFO L225 Difference]: With dead ends: 268 [2020-07-21 11:01:21,168 INFO L226 Difference]: Without dead ends: 253 [2020-07-21 11:01:21,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1107 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:01:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-21 11:01:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 190. [2020-07-21 11:01:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 11:01:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 374 transitions. [2020-07-21 11:01:21,190 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 374 transitions. Word has length 572 [2020-07-21 11:01:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:21,191 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 374 transitions. [2020-07-21 11:01:21,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:01:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 374 transitions. [2020-07-21 11:01:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 11:01:21,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:21,196 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:21,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:21,406 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -492224958, now seen corresponding path program 33 times [2020-07-21 11:01:21,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:21,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233816968] [2020-07-21 11:01:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:01:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 701 proven. 204 refuted. 0 times theorem prover too weak. 4447 trivial. 0 not checked. [2020-07-21 11:01:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:23,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:23,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:23,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:24,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 705 proven. 214 refuted. 0 times theorem prover too weak. 4433 trivial. 0 not checked. [2020-07-21 11:01:25,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233816968] [2020-07-21 11:01:25,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:25,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:01:25,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699412115] [2020-07-21 11:01:25,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:01:25,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:01:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:01:25,447 INFO L87 Difference]: Start difference. First operand 190 states and 374 transitions. Second operand 17 states. [2020-07-21 11:01:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:25,786 INFO L93 Difference]: Finished difference Result 266 states and 549 transitions. [2020-07-21 11:01:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:01:25,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-21 11:01:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:25,790 INFO L225 Difference]: With dead ends: 266 [2020-07-21 11:01:25,790 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 11:01:25,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:01:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 11:01:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 183. [2020-07-21 11:01:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 11:01:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 343 transitions. [2020-07-21 11:01:25,806 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 343 transitions. Word has length 435 [2020-07-21 11:01:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:25,806 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 343 transitions. [2020-07-21 11:01:25,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:01:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 343 transitions. [2020-07-21 11:01:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 11:01:25,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:25,811 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:26,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:26,012 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -969075608, now seen corresponding path program 34 times [2020-07-21 11:01:26,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:26,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214614033] [2020-07-21 11:01:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:01:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 869 proven. 214 refuted. 0 times theorem prover too weak. 4294 trivial. 0 not checked. [2020-07-21 11:01:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:28,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:28,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:29,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:30,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 871 proven. 233 refuted. 0 times theorem prover too weak. 4273 trivial. 0 not checked. [2020-07-21 11:01:31,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214614033] [2020-07-21 11:01:31,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:31,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:01:31,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724206863] [2020-07-21 11:01:31,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:01:31,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:01:31,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:01:31,008 INFO L87 Difference]: Start difference. First operand 183 states and 343 transitions. Second operand 19 states. [2020-07-21 11:01:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:31,447 INFO L93 Difference]: Finished difference Result 232 states and 434 transitions. [2020-07-21 11:01:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:01:31,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 436 [2020-07-21 11:01:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:31,451 INFO L225 Difference]: With dead ends: 232 [2020-07-21 11:01:31,451 INFO L226 Difference]: Without dead ends: 217 [2020-07-21 11:01:31,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 839 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:01:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-21 11:01:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2020-07-21 11:01:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 11:01:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 326 transitions. [2020-07-21 11:01:31,469 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 326 transitions. Word has length 436 [2020-07-21 11:01:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:31,469 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 326 transitions. [2020-07-21 11:01:31,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:01:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 326 transitions. [2020-07-21 11:01:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 11:01:31,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:31,474 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:31,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:31,689 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1055008279, now seen corresponding path program 35 times [2020-07-21 11:01:31,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624736031] [2020-07-21 11:01:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:01:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 600 proven. 149 refuted. 0 times theorem prover too weak. 4267 trivial. 0 not checked. [2020-07-21 11:01:32,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:33,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:33,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:34,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:34,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 600 proven. 161 refuted. 0 times theorem prover too weak. 4255 trivial. 0 not checked. [2020-07-21 11:01:35,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624736031] [2020-07-21 11:01:35,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:35,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:01:35,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830539802] [2020-07-21 11:01:35,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:01:35,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:01:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:01:35,108 INFO L87 Difference]: Start difference. First operand 175 states and 326 transitions. Second operand 15 states. [2020-07-21 11:01:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:35,389 INFO L93 Difference]: Finished difference Result 275 states and 629 transitions. [2020-07-21 11:01:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:01:35,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 422 [2020-07-21 11:01:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:35,396 INFO L225 Difference]: With dead ends: 275 [2020-07-21 11:01:35,396 INFO L226 Difference]: Without dead ends: 263 [2020-07-21 11:01:35,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 819 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:01:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-07-21 11:01:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 188. [2020-07-21 11:01:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-21 11:01:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 378 transitions. [2020-07-21 11:01:35,415 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 378 transitions. Word has length 422 [2020-07-21 11:01:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:35,416 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 378 transitions. [2020-07-21 11:01:35,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:01:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 378 transitions. [2020-07-21 11:01:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 11:01:35,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:35,419 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 26, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:35,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:35,621 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1150880091, now seen corresponding path program 36 times [2020-07-21 11:01:35,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:35,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33315357] [2020-07-21 11:01:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:01:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 745 proven. 253 refuted. 0 times theorem prover too weak. 5376 trivial. 0 not checked. [2020-07-21 11:01:36,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:37,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:37,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:38,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:39,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 749 proven. 265 refuted. 0 times theorem prover too weak. 5360 trivial. 0 not checked. [2020-07-21 11:01:39,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33315357] [2020-07-21 11:01:39,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:39,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:01:39,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287121424] [2020-07-21 11:01:39,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:01:39,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:01:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:01:39,978 INFO L87 Difference]: Start difference. First operand 188 states and 378 transitions. Second operand 17 states. [2020-07-21 11:01:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:40,320 INFO L93 Difference]: Finished difference Result 222 states and 446 transitions. [2020-07-21 11:01:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:01:40,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 473 [2020-07-21 11:01:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:40,325 INFO L225 Difference]: With dead ends: 222 [2020-07-21 11:01:40,325 INFO L226 Difference]: Without dead ends: 207 [2020-07-21 11:01:40,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 917 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:01:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-21 11:01:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2020-07-21 11:01:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 11:01:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 313 transitions. [2020-07-21 11:01:40,338 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 313 transitions. Word has length 473 [2020-07-21 11:01:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:40,339 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 313 transitions. [2020-07-21 11:01:40,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:01:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 313 transitions. [2020-07-21 11:01:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2020-07-21 11:01:40,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:40,342 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 31, 30, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 13, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:40,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:40,543 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1754677566, now seen corresponding path program 37 times [2020-07-21 11:01:40,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:40,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035244412] [2020-07-21 11:01:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:01:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7672 backedges. 951 proven. 357 refuted. 0 times theorem prover too weak. 6364 trivial. 0 not checked. [2020-07-21 11:01:41,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:43,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:43,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:44,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:45,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7672 backedges. 951 proven. 380 refuted. 0 times theorem prover too weak. 6341 trivial. 0 not checked. [2020-07-21 11:01:46,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035244412] [2020-07-21 11:01:46,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:46,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:01:46,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987969059] [2020-07-21 11:01:46,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:01:46,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:01:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:01:46,146 INFO L87 Difference]: Start difference. First operand 173 states and 313 transitions. Second operand 19 states. [2020-07-21 11:01:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:46,560 INFO L93 Difference]: Finished difference Result 185 states and 331 transitions. [2020-07-21 11:01:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:01:46,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 518 [2020-07-21 11:01:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:46,564 INFO L225 Difference]: With dead ends: 185 [2020-07-21 11:01:46,564 INFO L226 Difference]: Without dead ends: 170 [2020-07-21 11:01:46,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1003 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:01:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-21 11:01:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-07-21 11:01:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-21 11:01:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 304 transitions. [2020-07-21 11:01:46,576 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 304 transitions. Word has length 518 [2020-07-21 11:01:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:46,576 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 304 transitions. [2020-07-21 11:01:46,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:01:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 304 transitions. [2020-07-21 11:01:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 11:01:46,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:46,579 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 29, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 13, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:46,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:46,780 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1808479913, now seen corresponding path program 38 times [2020-07-21 11:01:46,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:46,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291678294] [2020-07-21 11:01:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:01:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 609 proven. 219 refuted. 0 times theorem prover too weak. 5627 trivial. 0 not checked. [2020-07-21 11:01:47,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:48,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:48,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:49,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 609 proven. 229 refuted. 0 times theorem prover too weak. 5617 trivial. 0 not checked. [2020-07-21 11:01:50,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291678294] [2020-07-21 11:01:50,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:50,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:01:50,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262480039] [2020-07-21 11:01:50,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:01:50,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:01:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:01:50,761 INFO L87 Difference]: Start difference. First operand 167 states and 304 transitions. Second operand 15 states. [2020-07-21 11:01:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:51,042 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2020-07-21 11:01:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:01:51,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-21 11:01:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:51,046 INFO L225 Difference]: With dead ends: 195 [2020-07-21 11:01:51,046 INFO L226 Difference]: Without dead ends: 183 [2020-07-21 11:01:51,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:01:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-21 11:01:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2020-07-21 11:01:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 11:01:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 292 transitions. [2020-07-21 11:01:51,060 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 292 transitions. Word has length 476 [2020-07-21 11:01:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:51,060 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 292 transitions. [2020-07-21 11:01:51,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:01:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 292 transitions. [2020-07-21 11:01:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-21 11:01:51,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:51,065 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 26, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:51,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:51,278 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -865784946, now seen corresponding path program 39 times [2020-07-21 11:01:51,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:51,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110697361] [2020-07-21 11:01:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:01:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5394 backedges. 663 proven. 116 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2020-07-21 11:01:52,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:53,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:53,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:54,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5394 backedges. 667 proven. 122 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2020-07-21 11:01:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110697361] [2020-07-21 11:01:55,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:55,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:01:55,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100716141] [2020-07-21 11:01:55,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:01:55,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:01:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:01:55,011 INFO L87 Difference]: Start difference. First operand 161 states and 292 transitions. Second operand 15 states. [2020-07-21 11:01:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:55,330 INFO L93 Difference]: Finished difference Result 232 states and 499 transitions. [2020-07-21 11:01:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:01:55,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 437 [2020-07-21 11:01:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:55,336 INFO L225 Difference]: With dead ends: 232 [2020-07-21 11:01:55,337 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 11:01:55,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 849 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:01:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 11:01:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2020-07-21 11:01:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-07-21 11:01:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 363 transitions. [2020-07-21 11:01:55,359 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 363 transitions. Word has length 437 [2020-07-21 11:01:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:55,359 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 363 transitions. [2020-07-21 11:01:55,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:01:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 363 transitions. [2020-07-21 11:01:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-07-21 11:01:55,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:55,365 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 31, 31, 26, 26, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 11, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:55,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:55,578 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1081348014, now seen corresponding path program 40 times [2020-07-21 11:01:55,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:55,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181094536] [2020-07-21 11:01:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:56,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:01:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6062 backedges. 839 proven. 135 refuted. 0 times theorem prover too weak. 5088 trivial. 0 not checked. [2020-07-21 11:01:56,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:58,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:58,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:59,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6062 backedges. 845 proven. 143 refuted. 0 times theorem prover too weak. 5074 trivial. 0 not checked. [2020-07-21 11:02:00,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181094536] [2020-07-21 11:02:00,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:00,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:02:00,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191982325] [2020-07-21 11:02:00,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:02:00,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:02:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:02:00,198 INFO L87 Difference]: Start difference. First operand 181 states and 363 transitions. Second operand 17 states. [2020-07-21 11:02:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:00,552 INFO L93 Difference]: Finished difference Result 215 states and 426 transitions. [2020-07-21 11:02:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:02:00,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 461 [2020-07-21 11:02:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:00,557 INFO L225 Difference]: With dead ends: 215 [2020-07-21 11:02:00,558 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 11:02:00,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 893 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:02:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 11:02:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 161. [2020-07-21 11:02:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 11:02:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 280 transitions. [2020-07-21 11:02:00,575 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 280 transitions. Word has length 461 [2020-07-21 11:02:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:00,576 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 280 transitions. [2020-07-21 11:02:00,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:02:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 280 transitions. [2020-07-21 11:02:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 11:02:00,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:00,580 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:00,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:00,794 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:00,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1159776596, now seen corresponding path program 41 times [2020-07-21 11:02:00,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:00,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785233599] [2020-07-21 11:02:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:02:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 717 proven. 114 refuted. 0 times theorem prover too weak. 5278 trivial. 0 not checked. [2020-07-21 11:02:01,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:02,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:02,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:03,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 717 proven. 126 refuted. 0 times theorem prover too weak. 5266 trivial. 0 not checked. [2020-07-21 11:02:04,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785233599] [2020-07-21 11:02:04,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:04,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:02:04,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068630042] [2020-07-21 11:02:04,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:02:04,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:02:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:02:04,826 INFO L87 Difference]: Start difference. First operand 161 states and 280 transitions. Second operand 15 states. [2020-07-21 11:02:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:05,106 INFO L93 Difference]: Finished difference Result 180 states and 301 transitions. [2020-07-21 11:02:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:02:05,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 464 [2020-07-21 11:02:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:05,109 INFO L225 Difference]: With dead ends: 180 [2020-07-21 11:02:05,109 INFO L226 Difference]: Without dead ends: 167 [2020-07-21 11:02:05,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 903 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:02:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-07-21 11:02:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2020-07-21 11:02:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 11:02:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 271 transitions. [2020-07-21 11:02:05,121 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 271 transitions. Word has length 464 [2020-07-21 11:02:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:05,121 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 271 transitions. [2020-07-21 11:02:05,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:02:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 271 transitions. [2020-07-21 11:02:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 11:02:05,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:05,124 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:05,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:05,338 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -357877815, now seen corresponding path program 42 times [2020-07-21 11:02:05,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:05,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136938827] [2020-07-21 11:02:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 11:02:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 113 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2020-07-21 11:02:06,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:07,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:07,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 532 proven. 120 refuted. 0 times theorem prover too weak. 5092 trivial. 0 not checked. [2020-07-21 11:02:08,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136938827] [2020-07-21 11:02:08,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:08,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 11:02:08,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615958425] [2020-07-21 11:02:08,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 11:02:08,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:08,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 11:02:08,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:02:08,828 INFO L87 Difference]: Start difference. First operand 161 states and 271 transitions. Second operand 13 states. [2020-07-21 11:02:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:09,070 INFO L93 Difference]: Finished difference Result 233 states and 452 transitions. [2020-07-21 11:02:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:02:09,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 450 [2020-07-21 11:02:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:09,075 INFO L225 Difference]: With dead ends: 233 [2020-07-21 11:02:09,075 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 11:02:09,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 879 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:02:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 11:02:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-07-21 11:02:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:02:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 284 transitions. [2020-07-21 11:02:09,089 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 284 transitions. Word has length 450 [2020-07-21 11:02:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:09,089 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 284 transitions. [2020-07-21 11:02:09,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 11:02:09,089 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 284 transitions. [2020-07-21 11:02:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 11:02:09,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:09,092 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:09,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:09,293 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash 863707721, now seen corresponding path program 43 times [2020-07-21 11:02:09,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:09,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130041584] [2020-07-21 11:02:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:10,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:02:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 907 proven. 119 refuted. 0 times theorem prover too weak. 5427 trivial. 0 not checked. [2020-07-21 11:02:10,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:11,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:11,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:12,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:13,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 907 proven. 139 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2020-07-21 11:02:14,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130041584] [2020-07-21 11:02:14,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:14,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 11:02:14,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136104500] [2020-07-21 11:02:14,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 11:02:14,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 11:02:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:02:14,120 INFO L87 Difference]: Start difference. First operand 163 states and 284 transitions. Second operand 18 states. [2020-07-21 11:02:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:14,516 INFO L93 Difference]: Finished difference Result 228 states and 422 transitions. [2020-07-21 11:02:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:02:14,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 476 [2020-07-21 11:02:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:14,521 INFO L225 Difference]: With dead ends: 228 [2020-07-21 11:02:14,522 INFO L226 Difference]: Without dead ends: 215 [2020-07-21 11:02:14,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:02:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-21 11:02:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 163. [2020-07-21 11:02:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:02:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 290 transitions. [2020-07-21 11:02:14,536 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 290 transitions. Word has length 476 [2020-07-21 11:02:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:14,536 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 290 transitions. [2020-07-21 11:02:14,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 11:02:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 290 transitions. [2020-07-21 11:02:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 11:02:14,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:14,539 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:14,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:14,740 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:14,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2127692176, now seen corresponding path program 44 times [2020-07-21 11:02:14,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:14,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212595349] [2020-07-21 11:02:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:02:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 1043 proven. 183 refuted. 0 times theorem prover too weak. 5587 trivial. 0 not checked. [2020-07-21 11:02:15,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:17,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:18,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:18,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:18,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:18,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:18,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:19,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 1043 proven. 204 refuted. 0 times theorem prover too weak. 5566 trivial. 0 not checked. [2020-07-21 11:02:20,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212595349] [2020-07-21 11:02:20,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:20,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:02:20,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808040811] [2020-07-21 11:02:20,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:02:20,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:02:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:02:20,593 INFO L87 Difference]: Start difference. First operand 163 states and 290 transitions. Second operand 19 states. [2020-07-21 11:02:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:21,068 INFO L93 Difference]: Finished difference Result 199 states and 349 transitions. [2020-07-21 11:02:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:02:21,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 489 [2020-07-21 11:02:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:21,071 INFO L225 Difference]: With dead ends: 199 [2020-07-21 11:02:21,072 INFO L226 Difference]: Without dead ends: 186 [2020-07-21 11:02:21,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 945 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:02:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-21 11:02:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2020-07-21 11:02:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 11:02:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 264 transitions. [2020-07-21 11:02:21,084 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 264 transitions. Word has length 489 [2020-07-21 11:02:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:21,084 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 264 transitions. [2020-07-21 11:02:21,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:02:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 264 transitions. [2020-07-21 11:02:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 11:02:21,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:21,088 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:21,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:21,293 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787645, now seen corresponding path program 45 times [2020-07-21 11:02:21,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:21,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534502088] [2020-07-21 11:02:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:02:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 904 proven. 126 refuted. 0 times theorem prover too weak. 5423 trivial. 0 not checked. [2020-07-21 11:02:22,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:23,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:24,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:25,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 904 proven. 142 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2020-07-21 11:02:26,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534502088] [2020-07-21 11:02:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:26,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:02:26,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755746744] [2020-07-21 11:02:26,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:02:26,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:02:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:02:26,264 INFO L87 Difference]: Start difference. First operand 150 states and 264 transitions. Second operand 17 states. [2020-07-21 11:02:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:26,648 INFO L93 Difference]: Finished difference Result 163 states and 276 transitions. [2020-07-21 11:02:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:02:26,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-21 11:02:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:26,651 INFO L225 Difference]: With dead ends: 163 [2020-07-21 11:02:26,651 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 11:02:26,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:02:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 11:02:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2020-07-21 11:02:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-21 11:02:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 236 transitions. [2020-07-21 11:02:26,662 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 236 transitions. Word has length 476 [2020-07-21 11:02:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:26,663 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 236 transitions. [2020-07-21 11:02:26,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:02:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 236 transitions. [2020-07-21 11:02:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 11:02:26,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:26,665 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:26,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:26,866 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 46 times [2020-07-21 11:02:26,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:26,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757304351] [2020-07-21 11:02:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-21 11:02:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 11:02:29,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 11:02:38,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757304351] [2020-07-21 11:02:38,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:38,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-21 11:02:38,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158581609] [2020-07-21 11:02:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 11:02:38,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 11:02:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 11:02:38,423 INFO L87 Difference]: Start difference. First operand 139 states and 236 transitions. Second operand 52 states. [2020-07-21 11:02:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:40,545 INFO L93 Difference]: Finished difference Result 355 states and 751 transitions. [2020-07-21 11:02:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 11:02:40,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-21 11:02:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:40,557 INFO L225 Difference]: With dead ends: 355 [2020-07-21 11:02:40,557 INFO L226 Difference]: Without dead ends: 348 [2020-07-21 11:02:40,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2020-07-21 11:02:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-07-21 11:02:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 237. [2020-07-21 11:02:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-21 11:02:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 512 transitions. [2020-07-21 11:02:40,607 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 512 transitions. Word has length 463 [2020-07-21 11:02:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:40,607 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 512 transitions. [2020-07-21 11:02:40,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 11:02:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 512 transitions. [2020-07-21 11:02:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-07-21 11:02:40,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:40,614 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 38, 38, 32, 25, 22, 22, 22, 22, 22, 22, 22, 20, 19, 19, 19, 19, 19, 19, 19, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:40,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:40,815 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:40,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1492721778, now seen corresponding path program 47 times [2020-07-21 11:02:40,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:40,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706872050] [2020-07-21 11:02:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:02:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9176 backedges. 613 proven. 609 refuted. 0 times theorem prover too weak. 7954 trivial. 0 not checked. [2020-07-21 11:02:41,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:44,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:45,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:46,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9176 backedges. 615 proven. 623 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2020-07-21 11:02:46,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706872050] [2020-07-21 11:02:46,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:46,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:02:46,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998556909] [2020-07-21 11:02:46,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:02:46,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:02:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:02:46,789 INFO L87 Difference]: Start difference. First operand 237 states and 512 transitions. Second operand 17 states. [2020-07-21 11:02:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:47,141 INFO L93 Difference]: Finished difference Result 279 states and 572 transitions. [2020-07-21 11:02:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:02:47,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 562 [2020-07-21 11:02:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:47,149 INFO L225 Difference]: With dead ends: 279 [2020-07-21 11:02:47,150 INFO L226 Difference]: Without dead ends: 262 [2020-07-21 11:02:47,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 1095 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:02:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-21 11:02:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2020-07-21 11:02:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-21 11:02:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 528 transitions. [2020-07-21 11:02:47,179 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 528 transitions. Word has length 562 [2020-07-21 11:02:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:47,180 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 528 transitions. [2020-07-21 11:02:47,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:02:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 528 transitions. [2020-07-21 11:02:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-21 11:02:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:47,185 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 29, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 12, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:47,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:47,386 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash -593210148, now seen corresponding path program 48 times [2020-07-21 11:02:47,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:47,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588844174] [2020-07-21 11:02:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:02:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7588 backedges. 432 proven. 858 refuted. 0 times theorem prover too weak. 6298 trivial. 0 not checked. [2020-07-21 11:02:48,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:51,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:52,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:52,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7588 backedges. 438 proven. 873 refuted. 0 times theorem prover too weak. 6277 trivial. 0 not checked. [2020-07-21 11:02:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588844174] [2020-07-21 11:02:53,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:02:53,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:02:53,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994825619] [2020-07-21 11:02:53,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:02:53,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:02:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:02:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:02:53,873 INFO L87 Difference]: Start difference. First operand 249 states and 528 transitions. Second operand 19 states. [2020-07-21 11:02:54,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:02:54,301 INFO L93 Difference]: Finished difference Result 290 states and 605 transitions. [2020-07-21 11:02:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:02:54,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 514 [2020-07-21 11:02:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:02:54,308 INFO L225 Difference]: With dead ends: 290 [2020-07-21 11:02:54,308 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 11:02:54,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 995 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:02:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 11:02:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 254. [2020-07-21 11:02:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-21 11:02:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 545 transitions. [2020-07-21 11:02:54,333 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 545 transitions. Word has length 514 [2020-07-21 11:02:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:02:54,333 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 545 transitions. [2020-07-21 11:02:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:02:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 545 transitions. [2020-07-21 11:02:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-07-21 11:02:54,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:02:54,338 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 33, 25, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 16, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:02:54,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:54,539 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:02:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:02:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash -849903472, now seen corresponding path program 49 times [2020-07-21 11:02:54,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:02:54,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300506269] [2020-07-21 11:02:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:02:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:02:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:02:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:02:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9152 backedges. 464 proven. 837 refuted. 0 times theorem prover too weak. 7851 trivial. 0 not checked. [2020-07-21 11:02:55,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:02:58,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:59,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9152 backedges. 470 proven. 847 refuted. 0 times theorem prover too weak. 7835 trivial. 0 not checked. [2020-07-21 11:03:00,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300506269] [2020-07-21 11:03:00,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:00,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:00,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227802040] [2020-07-21 11:03:00,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:00,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:00,578 INFO L87 Difference]: Start difference. First operand 254 states and 545 transitions. Second operand 17 states. [2020-07-21 11:03:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:01,009 INFO L93 Difference]: Finished difference Result 311 states and 668 transitions. [2020-07-21 11:03:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:01,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 563 [2020-07-21 11:03:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:01,016 INFO L225 Difference]: With dead ends: 311 [2020-07-21 11:03:01,017 INFO L226 Difference]: Without dead ends: 286 [2020-07-21 11:03:01,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 1097 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-21 11:03:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 260. [2020-07-21 11:03:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-21 11:03:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 565 transitions. [2020-07-21 11:03:01,053 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 565 transitions. Word has length 563 [2020-07-21 11:03:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:01,053 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 565 transitions. [2020-07-21 11:03:01,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 565 transitions. [2020-07-21 11:03:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 11:03:01,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:01,060 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 29, 26, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 13, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:01,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:01,275 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1366740818, now seen corresponding path program 50 times [2020-07-21 11:03:01,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:01,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590829057] [2020-07-21 11:03:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6819 backedges. 569 proven. 491 refuted. 0 times theorem prover too weak. 5759 trivial. 0 not checked. [2020-07-21 11:03:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:04,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:04,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:05,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:06,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6819 backedges. 573 proven. 503 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2020-07-21 11:03:06,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590829057] [2020-07-21 11:03:06,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:06,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:06,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626073596] [2020-07-21 11:03:06,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:06,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:06,741 INFO L87 Difference]: Start difference. First operand 260 states and 565 transitions. Second operand 17 states. [2020-07-21 11:03:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:07,144 INFO L93 Difference]: Finished difference Result 311 states and 685 transitions. [2020-07-21 11:03:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:07,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-21 11:03:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:07,152 INFO L225 Difference]: With dead ends: 311 [2020-07-21 11:03:07,152 INFO L226 Difference]: Without dead ends: 299 [2020-07-21 11:03:07,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-21 11:03:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 262. [2020-07-21 11:03:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-21 11:03:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 580 transitions. [2020-07-21 11:03:07,178 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 580 transitions. Word has length 488 [2020-07-21 11:03:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:07,178 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 580 transitions. [2020-07-21 11:03:07,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 580 transitions. [2020-07-21 11:03:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-07-21 11:03:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:07,185 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 39, 39, 30, 26, 21, 21, 21, 21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 19, 13, 12, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:07,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:07,400 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash 679953011, now seen corresponding path program 51 times [2020-07-21 11:03:07,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:07,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914528187] [2020-07-21 11:03:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:08,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8692 backedges. 612 proven. 653 refuted. 0 times theorem prover too weak. 7427 trivial. 0 not checked. [2020-07-21 11:03:08,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:11,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:11,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:11,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:12,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8692 backedges. 616 proven. 665 refuted. 0 times theorem prover too weak. 7411 trivial. 0 not checked. [2020-07-21 11:03:13,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914528187] [2020-07-21 11:03:13,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:13,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:13,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072023261] [2020-07-21 11:03:13,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:13,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:13,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:13,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:13,391 INFO L87 Difference]: Start difference. First operand 262 states and 580 transitions. Second operand 17 states. [2020-07-21 11:03:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:13,825 INFO L93 Difference]: Finished difference Result 324 states and 724 transitions. [2020-07-21 11:03:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:13,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 549 [2020-07-21 11:03:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:13,833 INFO L225 Difference]: With dead ends: 324 [2020-07-21 11:03:13,834 INFO L226 Difference]: Without dead ends: 309 [2020-07-21 11:03:13,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 1069 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-07-21 11:03:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 261. [2020-07-21 11:03:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-07-21 11:03:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 573 transitions. [2020-07-21 11:03:13,870 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 573 transitions. Word has length 549 [2020-07-21 11:03:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:13,870 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 573 transitions. [2020-07-21 11:03:13,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 573 transitions. [2020-07-21 11:03:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-07-21 11:03:13,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:13,878 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 39, 39, 28, 28, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 19, 16, 11, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:14,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:14,092 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1627402250, now seen corresponding path program 52 times [2020-07-21 11:03:14,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:14,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597089540] [2020-07-21 11:03:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:03:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 400 proven. 1091 refuted. 0 times theorem prover too weak. 7621 trivial. 0 not checked. [2020-07-21 11:03:15,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:18,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:18,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:19,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:20,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 406 proven. 1106 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-07-21 11:03:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597089540] [2020-07-21 11:03:21,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:21,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:03:21,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200502069] [2020-07-21 11:03:21,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:03:21,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:03:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:03:21,158 INFO L87 Difference]: Start difference. First operand 261 states and 573 transitions. Second operand 19 states. [2020-07-21 11:03:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:21,684 INFO L93 Difference]: Finished difference Result 366 states and 822 transitions. [2020-07-21 11:03:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:03:21,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 561 [2020-07-21 11:03:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:21,692 INFO L225 Difference]: With dead ends: 366 [2020-07-21 11:03:21,692 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 11:03:21,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1089 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:03:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 11:03:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 270. [2020-07-21 11:03:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-21 11:03:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2020-07-21 11:03:21,720 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 561 [2020-07-21 11:03:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:21,720 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2020-07-21 11:03:21,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:03:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2020-07-21 11:03:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2020-07-21 11:03:21,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:21,729 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 41, 41, 29, 27, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 15, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:21,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:21,942 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash 62079779, now seen corresponding path program 53 times [2020-07-21 11:03:21,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:21,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004189594] [2020-07-21 11:03:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9505 backedges. 1051 proven. 270 refuted. 0 times theorem prover too weak. 8184 trivial. 0 not checked. [2020-07-21 11:03:23,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:25,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:25,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:26,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9505 backedges. 1051 proven. 290 refuted. 0 times theorem prover too weak. 8164 trivial. 0 not checked. [2020-07-21 11:03:28,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004189594] [2020-07-21 11:03:28,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:28,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:28,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121874835] [2020-07-21 11:03:28,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:28,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:28,552 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand 17 states. [2020-07-21 11:03:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:29,096 INFO L93 Difference]: Finished difference Result 310 states and 661 transitions. [2020-07-21 11:03:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:29,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 573 [2020-07-21 11:03:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:29,102 INFO L225 Difference]: With dead ends: 310 [2020-07-21 11:03:29,103 INFO L226 Difference]: Without dead ends: 295 [2020-07-21 11:03:29,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1117 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-21 11:03:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 273. [2020-07-21 11:03:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-21 11:03:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 585 transitions. [2020-07-21 11:03:29,141 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 585 transitions. Word has length 573 [2020-07-21 11:03:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:29,141 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 585 transitions. [2020-07-21 11:03:29,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 585 transitions. [2020-07-21 11:03:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 11:03:29,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:29,150 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 35, 35, 27, 27, 21, 21, 21, 21, 21, 21, 21, 17, 17, 17, 17, 17, 17, 17, 15, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:29,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:29,364 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash 859555739, now seen corresponding path program 54 times [2020-07-21 11:03:29,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:29,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014000553] [2020-07-21 11:03:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:03:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7910 backedges. 299 proven. 1079 refuted. 0 times theorem prover too weak. 6532 trivial. 0 not checked. [2020-07-21 11:03:30,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:32,337 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 11:03:34,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:35,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:36,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:36,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:36,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:37,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:37,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:37,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:37,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7910 backedges. 300 proven. 1099 refuted. 0 times theorem prover too weak. 6511 trivial. 0 not checked. [2020-07-21 11:03:37,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014000553] [2020-07-21 11:03:37,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:37,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:03:37,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048388927] [2020-07-21 11:03:37,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:03:37,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:03:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:03:37,482 INFO L87 Difference]: Start difference. First operand 273 states and 585 transitions. Second operand 21 states. [2020-07-21 11:03:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:38,236 INFO L93 Difference]: Finished difference Result 394 states and 864 transitions. [2020-07-21 11:03:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:03:38,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 523 [2020-07-21 11:03:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:38,245 INFO L225 Difference]: With dead ends: 394 [2020-07-21 11:03:38,245 INFO L226 Difference]: Without dead ends: 279 [2020-07-21 11:03:38,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1011 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:03:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-21 11:03:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2020-07-21 11:03:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-07-21 11:03:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 574 transitions. [2020-07-21 11:03:38,273 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 574 transitions. Word has length 523 [2020-07-21 11:03:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:38,274 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 574 transitions. [2020-07-21 11:03:38,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:03:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 574 transitions. [2020-07-21 11:03:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2020-07-21 11:03:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:38,279 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 28, 27, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 12, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:38,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:38,480 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -60856721, now seen corresponding path program 55 times [2020-07-21 11:03:38,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:38,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247751759] [2020-07-21 11:03:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7885 backedges. 928 proven. 274 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2020-07-21 11:03:39,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:41,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:41,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:42,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:42,641 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 11:03:42,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:42,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:42,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:42,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7885 backedges. 930 proven. 288 refuted. 0 times theorem prover too weak. 6667 trivial. 0 not checked. [2020-07-21 11:03:45,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247751759] [2020-07-21 11:03:45,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:45,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:45,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50817573] [2020-07-21 11:03:45,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:45,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:45,173 INFO L87 Difference]: Start difference. First operand 276 states and 574 transitions. Second operand 17 states. [2020-07-21 11:03:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:45,613 INFO L93 Difference]: Finished difference Result 308 states and 616 transitions. [2020-07-21 11:03:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:45,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 524 [2020-07-21 11:03:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:45,617 INFO L225 Difference]: With dead ends: 308 [2020-07-21 11:03:45,617 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 11:03:45,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1019 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 11:03:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 270. [2020-07-21 11:03:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-21 11:03:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 562 transitions. [2020-07-21 11:03:45,652 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 562 transitions. Word has length 524 [2020-07-21 11:03:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:45,653 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 562 transitions. [2020-07-21 11:03:45,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 562 transitions. [2020-07-21 11:03:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:03:45,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:45,660 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:45,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:45,874 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -632706865, now seen corresponding path program 56 times [2020-07-21 11:03:45,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:45,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401738427] [2020-07-21 11:03:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 886 proven. 137 refuted. 0 times theorem prover too weak. 5392 trivial. 0 not checked. [2020-07-21 11:03:47,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:48,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:48,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:49,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:49,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:49,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:49,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:49,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:50,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:50,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 888 proven. 151 refuted. 0 times theorem prover too weak. 5376 trivial. 0 not checked. [2020-07-21 11:03:51,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401738427] [2020-07-21 11:03:51,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:51,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:51,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205255800] [2020-07-21 11:03:51,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:51,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:51,963 INFO L87 Difference]: Start difference. First operand 270 states and 562 transitions. Second operand 17 states. [2020-07-21 11:03:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:52,718 INFO L93 Difference]: Finished difference Result 323 states and 650 transitions. [2020-07-21 11:03:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:52,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 11:03:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:52,728 INFO L225 Difference]: With dead ends: 323 [2020-07-21 11:03:52,728 INFO L226 Difference]: Without dead ends: 307 [2020-07-21 11:03:52,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 921 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-07-21 11:03:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 255. [2020-07-21 11:03:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-07-21 11:03:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 503 transitions. [2020-07-21 11:03:52,772 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 503 transitions. Word has length 475 [2020-07-21 11:03:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:52,773 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 503 transitions. [2020-07-21 11:03:52,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:03:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 503 transitions. [2020-07-21 11:03:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 11:03:52,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:52,780 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 28, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:52,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:52,996 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1685863567, now seen corresponding path program 57 times [2020-07-21 11:03:52,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009998550] [2020-07-21 11:03:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:03:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:03:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 822 proven. 264 refuted. 0 times theorem prover too weak. 6063 trivial. 0 not checked. [2020-07-21 11:03:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:03:56,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:56,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:57,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:58,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 826 proven. 276 refuted. 0 times theorem prover too weak. 6047 trivial. 0 not checked. [2020-07-21 11:03:59,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009998550] [2020-07-21 11:03:59,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:59,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 11:03:59,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817140790] [2020-07-21 11:03:59,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:03:59,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:59,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:03:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:03:59,521 INFO L87 Difference]: Start difference. First operand 255 states and 503 transitions. Second operand 17 states. [2020-07-21 11:03:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:59,979 INFO L93 Difference]: Finished difference Result 299 states and 581 transitions. [2020-07-21 11:03:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:03:59,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 500 [2020-07-21 11:03:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:59,984 INFO L225 Difference]: With dead ends: 299 [2020-07-21 11:03:59,984 INFO L226 Difference]: Without dead ends: 284 [2020-07-21 11:03:59,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 971 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:03:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-07-21 11:04:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 244. [2020-07-21 11:04:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-21 11:04:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 473 transitions. [2020-07-21 11:04:00,006 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 473 transitions. Word has length 500 [2020-07-21 11:04:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:00,007 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 473 transitions. [2020-07-21 11:04:00,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:04:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 473 transitions. [2020-07-21 11:04:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2020-07-21 11:04:00,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:00,011 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 27, 26, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 13, 11, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:00,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:00,212 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2017360291, now seen corresponding path program 58 times [2020-07-21 11:04:00,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:00,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906786468] [2020-07-21 11:04:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:04:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 751 proven. 165 refuted. 0 times theorem prover too weak. 6916 trivial. 0 not checked. [2020-07-21 11:04:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:03,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:03,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:04,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 753 proven. 173 refuted. 0 times theorem prover too weak. 6906 trivial. 0 not checked. [2020-07-21 11:04:06,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906786468] [2020-07-21 11:04:06,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:06,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:04:06,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119235920] [2020-07-21 11:04:06,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:04:06,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:04:06,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:04:06,060 INFO L87 Difference]: Start difference. First operand 244 states and 473 transitions. Second operand 15 states. [2020-07-21 11:04:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:06,461 INFO L93 Difference]: Finished difference Result 270 states and 516 transitions. [2020-07-21 11:04:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:04:06,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 522 [2020-07-21 11:04:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:06,467 INFO L225 Difference]: With dead ends: 270 [2020-07-21 11:04:06,467 INFO L226 Difference]: Without dead ends: 257 [2020-07-21 11:04:06,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1019 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:04:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-21 11:04:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 234. [2020-07-21 11:04:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 11:04:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 453 transitions. [2020-07-21 11:04:06,495 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 453 transitions. Word has length 522 [2020-07-21 11:04:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:06,495 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 453 transitions. [2020-07-21 11:04:06,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:04:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 453 transitions. [2020-07-21 11:04:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 11:04:06,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:06,500 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 27, 27, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 13, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:06,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:06,701 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 168637099, now seen corresponding path program 59 times [2020-07-21 11:04:06,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:06,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929769890] [2020-07-21 11:04:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:04:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7858 backedges. 343 proven. 1037 refuted. 0 times theorem prover too weak. 6478 trivial. 0 not checked. [2020-07-21 11:04:08,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:10,296 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:04:12,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:12,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:13,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:13,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:14,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:14,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7858 backedges. 342 proven. 1059 refuted. 0 times theorem prover too weak. 6457 trivial. 0 not checked. [2020-07-21 11:04:15,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929769890] [2020-07-21 11:04:15,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:15,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:04:15,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890601520] [2020-07-21 11:04:15,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:04:15,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:04:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:04:15,861 INFO L87 Difference]: Start difference. First operand 234 states and 453 transitions. Second operand 21 states. [2020-07-21 11:04:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:16,601 INFO L93 Difference]: Finished difference Result 309 states and 609 transitions. [2020-07-21 11:04:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:04:16,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 523 [2020-07-21 11:04:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:16,609 INFO L225 Difference]: With dead ends: 309 [2020-07-21 11:04:16,610 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 11:04:16,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1011 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:04:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 11:04:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 234. [2020-07-21 11:04:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 11:04:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 453 transitions. [2020-07-21 11:04:16,642 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 453 transitions. Word has length 523 [2020-07-21 11:04:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:16,642 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 453 transitions. [2020-07-21 11:04:16,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:04:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 453 transitions. [2020-07-21 11:04:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 11:04:16,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:16,647 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:16,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:16,848 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -773086462, now seen corresponding path program 60 times [2020-07-21 11:04:16,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:16,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471406925] [2020-07-21 11:04:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:04:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 383 proven. 788 refuted. 0 times theorem prover too weak. 6303 trivial. 0 not checked. [2020-07-21 11:04:18,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:21,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:22,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:22,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:23,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 385 proven. 800 refuted. 0 times theorem prover too weak. 6289 trivial. 0 not checked. [2020-07-21 11:04:24,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471406925] [2020-07-21 11:04:24,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:24,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:04:24,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117074148] [2020-07-21 11:04:24,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:04:24,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:24,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:04:24,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:04:24,210 INFO L87 Difference]: Start difference. First operand 234 states and 453 transitions. Second operand 19 states. [2020-07-21 11:04:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:24,727 INFO L93 Difference]: Finished difference Result 269 states and 493 transitions. [2020-07-21 11:04:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:04:24,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-21 11:04:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:24,734 INFO L225 Difference]: With dead ends: 269 [2020-07-21 11:04:24,734 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 11:04:24,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 991 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:04:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 11:04:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2020-07-21 11:04:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 11:04:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 453 transitions. [2020-07-21 11:04:24,755 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 453 transitions. Word has length 511 [2020-07-21 11:04:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:24,755 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 453 transitions. [2020-07-21 11:04:24,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:04:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 453 transitions. [2020-07-21 11:04:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-07-21 11:04:24,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:24,762 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 27, 27, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 14, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:24,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:24,976 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 225283472, now seen corresponding path program 61 times [2020-07-21 11:04:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:24,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222997853] [2020-07-21 11:04:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:04:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 305 proven. 926 refuted. 0 times theorem prover too weak. 7007 trivial. 0 not checked. [2020-07-21 11:04:26,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:29,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:29,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:31,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:31,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:31,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:31,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:32,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:32,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:32,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:32,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 309 proven. 936 refuted. 0 times theorem prover too weak. 6993 trivial. 0 not checked. [2020-07-21 11:04:32,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222997853] [2020-07-21 11:04:32,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:32,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:04:32,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557263543] [2020-07-21 11:04:32,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:04:32,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:04:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:04:32,594 INFO L87 Difference]: Start difference. First operand 234 states and 453 transitions. Second operand 19 states. [2020-07-21 11:04:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:33,249 INFO L93 Difference]: Finished difference Result 315 states and 615 transitions. [2020-07-21 11:04:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:04:33,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 535 [2020-07-21 11:04:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:33,256 INFO L225 Difference]: With dead ends: 315 [2020-07-21 11:04:33,256 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 11:04:33,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1039 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:04:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 11:04:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 231. [2020-07-21 11:04:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 11:04:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 437 transitions. [2020-07-21 11:04:33,277 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 437 transitions. Word has length 535 [2020-07-21 11:04:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:33,277 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 437 transitions. [2020-07-21 11:04:33,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:04:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 437 transitions. [2020-07-21 11:04:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:04:33,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:33,281 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:33,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:33,482 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1832329655, now seen corresponding path program 62 times [2020-07-21 11:04:33,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:33,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437579815] [2020-07-21 11:04:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:04:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 563 proven. 518 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-21 11:04:34,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:38,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:38,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:38,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:38,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:38,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:38,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:39,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 563 proven. 532 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 11:04:40,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437579815] [2020-07-21 11:04:40,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:40,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:04:40,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604249243] [2020-07-21 11:04:40,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:04:40,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:04:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:04:40,623 INFO L87 Difference]: Start difference. First operand 231 states and 437 transitions. Second operand 19 states. [2020-07-21 11:04:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:41,270 INFO L93 Difference]: Finished difference Result 255 states and 466 transitions. [2020-07-21 11:04:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:04:41,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 11:04:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:41,276 INFO L225 Difference]: With dead ends: 255 [2020-07-21 11:04:41,276 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 11:04:41,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:04:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 11:04:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2020-07-21 11:04:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-07-21 11:04:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 445 transitions. [2020-07-21 11:04:41,306 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 445 transitions. Word has length 475 [2020-07-21 11:04:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:41,306 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 445 transitions. [2020-07-21 11:04:41,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:04:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 445 transitions. [2020-07-21 11:04:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:04:41,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:41,313 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:41,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:41,526 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1797879280, now seen corresponding path program 63 times [2020-07-21 11:04:41,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:41,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165106126] [2020-07-21 11:04:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:04:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 778 proven. 156 refuted. 0 times theorem prover too weak. 5856 trivial. 0 not checked. [2020-07-21 11:04:42,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:44,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:45,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:46,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 776 proven. 168 refuted. 0 times theorem prover too weak. 5846 trivial. 0 not checked. [2020-07-21 11:04:47,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165106126] [2020-07-21 11:04:47,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:47,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 11:04:47,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369325913] [2020-07-21 11:04:47,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:04:47,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:47,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:04:47,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:04:47,884 INFO L87 Difference]: Start difference. First operand 237 states and 445 transitions. Second operand 17 states. [2020-07-21 11:04:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:48,379 INFO L93 Difference]: Finished difference Result 309 states and 588 transitions. [2020-07-21 11:04:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:04:48,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-21 11:04:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:48,384 INFO L225 Difference]: With dead ends: 309 [2020-07-21 11:04:48,384 INFO L226 Difference]: Without dead ends: 293 [2020-07-21 11:04:48,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 947 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:04:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-07-21 11:04:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 234. [2020-07-21 11:04:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 11:04:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 444 transitions. [2020-07-21 11:04:48,405 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 444 transitions. Word has length 487 [2020-07-21 11:04:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:48,406 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 444 transitions. [2020-07-21 11:04:48,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:04:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 444 transitions. [2020-07-21 11:04:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 11:04:48,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:48,410 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:48,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:48,611 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1627513062, now seen corresponding path program 64 times [2020-07-21 11:04:48,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:48,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657223267] [2020-07-21 11:04:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:04:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 411 proven. 935 refuted. 0 times theorem prover too weak. 6128 trivial. 0 not checked. [2020-07-21 11:04:50,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:04:54,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:54,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:55,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:55,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:55,944 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 11:04:56,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:56,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:57,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 410 proven. 957 refuted. 0 times theorem prover too weak. 6107 trivial. 0 not checked. [2020-07-21 11:04:57,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657223267] [2020-07-21 11:04:57,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:57,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:04:57,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395029497] [2020-07-21 11:04:57,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:04:57,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:04:57,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:04:57,566 INFO L87 Difference]: Start difference. First operand 234 states and 444 transitions. Second operand 21 states. [2020-07-21 11:04:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:58,213 INFO L93 Difference]: Finished difference Result 281 states and 523 transitions. [2020-07-21 11:04:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:04:58,215 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-21 11:04:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:58,220 INFO L225 Difference]: With dead ends: 281 [2020-07-21 11:04:58,220 INFO L226 Difference]: Without dead ends: 264 [2020-07-21 11:04:58,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:04:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-21 11:04:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 232. [2020-07-21 11:04:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 11:04:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 438 transitions. [2020-07-21 11:04:58,243 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 438 transitions. Word has length 511 [2020-07-21 11:04:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:58,243 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 438 transitions. [2020-07-21 11:04:58,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:04:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 438 transitions. [2020-07-21 11:04:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 11:04:58,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:58,247 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:58,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:58,448 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 232579106, now seen corresponding path program 65 times [2020-07-21 11:04:58,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:58,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729325736] [2020-07-21 11:04:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:04:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 375 proven. 794 refuted. 0 times theorem prover too weak. 6305 trivial. 0 not checked. [2020-07-21 11:04:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:03,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:03,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:04,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:04,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:04,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:04,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:05,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:05,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:05,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 377 proven. 808 refuted. 0 times theorem prover too weak. 6289 trivial. 0 not checked. [2020-07-21 11:05:05,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729325736] [2020-07-21 11:05:05,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:05,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:05:05,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261037019] [2020-07-21 11:05:05,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:05:05,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:05:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:05:05,755 INFO L87 Difference]: Start difference. First operand 232 states and 438 transitions. Second operand 19 states. [2020-07-21 11:05:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:06,282 INFO L93 Difference]: Finished difference Result 293 states and 567 transitions. [2020-07-21 11:05:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:05:06,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-21 11:05:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:06,290 INFO L225 Difference]: With dead ends: 293 [2020-07-21 11:05:06,290 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 11:05:06,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 991 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:05:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 11:05:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2020-07-21 11:05:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 11:05:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 433 transitions. [2020-07-21 11:05:06,310 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 433 transitions. Word has length 511 [2020-07-21 11:05:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:06,311 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 433 transitions. [2020-07-21 11:05:06,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:05:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 433 transitions. [2020-07-21 11:05:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 11:05:06,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:06,398 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:06,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:06,599 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -661472670, now seen corresponding path program 66 times [2020-07-21 11:05:06,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:06,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895435230] [2020-07-21 11:05:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:05:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 479 proven. 507 refuted. 0 times theorem prover too weak. 6488 trivial. 0 not checked. [2020-07-21 11:05:07,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:10,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:10,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:11,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:12,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 479 proven. 517 refuted. 0 times theorem prover too weak. 6478 trivial. 0 not checked. [2020-07-21 11:05:13,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895435230] [2020-07-21 11:05:13,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:13,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 11:05:13,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398387975] [2020-07-21 11:05:13,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:05:13,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:05:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:05:13,008 INFO L87 Difference]: Start difference. First operand 229 states and 433 transitions. Second operand 17 states. [2020-07-21 11:05:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:13,445 INFO L93 Difference]: Finished difference Result 261 states and 472 transitions. [2020-07-21 11:05:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:05:13,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 511 [2020-07-21 11:05:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:13,451 INFO L225 Difference]: With dead ends: 261 [2020-07-21 11:05:13,451 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 11:05:13,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 995 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:05:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 11:05:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2020-07-21 11:05:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-21 11:05:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 428 transitions. [2020-07-21 11:05:13,470 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 428 transitions. Word has length 511 [2020-07-21 11:05:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:13,471 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 428 transitions. [2020-07-21 11:05:13,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:05:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 428 transitions. [2020-07-21 11:05:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:13,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:13,474 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:13,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:13,675 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 566926914, now seen corresponding path program 67 times [2020-07-21 11:05:13,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:13,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630720340] [2020-07-21 11:05:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:05:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 524 proven. 585 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-21 11:05:15,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:18,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:18,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:18,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:18,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:19,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:20,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 522 proven. 603 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 11:05:20,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630720340] [2020-07-21 11:05:20,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:05:20,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165017937] [2020-07-21 11:05:20,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:05:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:05:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:05:20,899 INFO L87 Difference]: Start difference. First operand 226 states and 428 transitions. Second operand 19 states. [2020-07-21 11:05:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:21,505 INFO L93 Difference]: Finished difference Result 281 states and 536 transitions. [2020-07-21 11:05:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:05:21,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 11:05:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:21,517 INFO L225 Difference]: With dead ends: 281 [2020-07-21 11:05:21,517 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 11:05:21,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:05:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 11:05:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 231. [2020-07-21 11:05:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 11:05:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 440 transitions. [2020-07-21 11:05:21,543 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 440 transitions. Word has length 487 [2020-07-21 11:05:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:21,543 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 440 transitions. [2020-07-21 11:05:21,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:05:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 440 transitions. [2020-07-21 11:05:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:21,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:21,547 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:21,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:21,748 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 296903346, now seen corresponding path program 68 times [2020-07-21 11:05:21,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:21,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313960899] [2020-07-21 11:05:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:05:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 703 proven. 233 refuted. 0 times theorem prover too weak. 5822 trivial. 0 not checked. [2020-07-21 11:05:23,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:24,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:24,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:25,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:25,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:25,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:25,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:25,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:26,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:26,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:26,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 703 proven. 243 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2020-07-21 11:05:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313960899] [2020-07-21 11:05:28,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:28,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 11:05:28,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696676518] [2020-07-21 11:05:28,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:05:28,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:28,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:05:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:05:28,139 INFO L87 Difference]: Start difference. First operand 231 states and 440 transitions. Second operand 17 states. [2020-07-21 11:05:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:28,603 INFO L93 Difference]: Finished difference Result 258 states and 471 transitions. [2020-07-21 11:05:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:05:28,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-21 11:05:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:28,610 INFO L225 Difference]: With dead ends: 258 [2020-07-21 11:05:28,610 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 11:05:28,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 947 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:05:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 11:05:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2020-07-21 11:05:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 11:05:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 434 transitions. [2020-07-21 11:05:28,634 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 434 transitions. Word has length 487 [2020-07-21 11:05:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:28,635 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 434 transitions. [2020-07-21 11:05:28,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:05:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 434 transitions. [2020-07-21 11:05:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:28,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:28,640 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:28,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:28,845 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1514051712, now seen corresponding path program 69 times [2020-07-21 11:05:28,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:28,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145788641] [2020-07-21 11:05:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:05:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 936 proven. 175 refuted. 0 times theorem prover too weak. 5647 trivial. 0 not checked. [2020-07-21 11:05:30,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:32,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:33,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:34,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:34,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 934 proven. 191 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-21 11:05:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145788641] [2020-07-21 11:05:36,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:36,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:05:36,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665484440] [2020-07-21 11:05:36,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:05:36,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:05:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:05:36,276 INFO L87 Difference]: Start difference. First operand 228 states and 434 transitions. Second operand 19 states. [2020-07-21 11:05:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:36,848 INFO L93 Difference]: Finished difference Result 276 states and 501 transitions. [2020-07-21 11:05:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:05:36,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 11:05:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:36,852 INFO L225 Difference]: With dead ends: 276 [2020-07-21 11:05:36,852 INFO L226 Difference]: Without dead ends: 263 [2020-07-21 11:05:36,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:05:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-07-21 11:05:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 223. [2020-07-21 11:05:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-21 11:05:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 422 transitions. [2020-07-21 11:05:36,874 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 422 transitions. Word has length 487 [2020-07-21 11:05:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:36,874 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 422 transitions. [2020-07-21 11:05:36,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:05:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 422 transitions. [2020-07-21 11:05:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:36,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:36,878 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:37,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:37,079 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1162720234, now seen corresponding path program 70 times [2020-07-21 11:05:37,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:37,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709607183] [2020-07-21 11:05:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:05:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 540 proven. 684 refuted. 0 times theorem prover too weak. 5542 trivial. 0 not checked. [2020-07-21 11:05:38,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:42,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:43,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:43,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:43,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:43,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:44,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 542 proven. 705 refuted. 0 times theorem prover too weak. 5519 trivial. 0 not checked. [2020-07-21 11:05:45,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709607183] [2020-07-21 11:05:45,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:45,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:05:45,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409594719] [2020-07-21 11:05:45,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:05:45,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:05:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:05:45,450 INFO L87 Difference]: Start difference. First operand 223 states and 422 transitions. Second operand 19 states. [2020-07-21 11:05:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:46,063 INFO L93 Difference]: Finished difference Result 284 states and 532 transitions. [2020-07-21 11:05:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:05:46,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 11:05:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:46,070 INFO L225 Difference]: With dead ends: 284 [2020-07-21 11:05:46,070 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 11:05:46,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 941 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:05:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 11:05:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 230. [2020-07-21 11:05:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-21 11:05:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 442 transitions. [2020-07-21 11:05:46,093 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 442 transitions. Word has length 487 [2020-07-21 11:05:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:46,093 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 442 transitions. [2020-07-21 11:05:46,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:05:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 442 transitions. [2020-07-21 11:05:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:46,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:46,097 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:46,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:46,313 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -390757500, now seen corresponding path program 71 times [2020-07-21 11:05:46,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:46,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160751730] [2020-07-21 11:05:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:05:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 582 proven. 694 refuted. 0 times theorem prover too weak. 5482 trivial. 0 not checked. [2020-07-21 11:05:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:51,726 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:05:52,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:52,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:53,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:53,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:54,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:54,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:54,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:54,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:55,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:55,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:55,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:55,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:55,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:05:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 579 proven. 718 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2020-07-21 11:05:56,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160751730] [2020-07-21 11:05:56,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:05:56,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:05:56,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662234290] [2020-07-21 11:05:56,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:05:56,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:05:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:05:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:05:56,530 INFO L87 Difference]: Start difference. First operand 230 states and 442 transitions. Second operand 21 states. [2020-07-21 11:05:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:05:57,284 INFO L93 Difference]: Finished difference Result 302 states and 572 transitions. [2020-07-21 11:05:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:05:57,287 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 487 [2020-07-21 11:05:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:05:57,292 INFO L225 Difference]: With dead ends: 302 [2020-07-21 11:05:57,292 INFO L226 Difference]: Without dead ends: 290 [2020-07-21 11:05:57,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 939 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:05:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-21 11:05:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 228. [2020-07-21 11:05:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 11:05:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 436 transitions. [2020-07-21 11:05:57,312 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 436 transitions. Word has length 487 [2020-07-21 11:05:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:05:57,312 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 436 transitions. [2020-07-21 11:05:57,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:05:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 436 transitions. [2020-07-21 11:05:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:05:57,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:05:57,316 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:05:57,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:57,517 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:05:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:05:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1303623422, now seen corresponding path program 72 times [2020-07-21 11:05:57,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:05:57,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671149672] [2020-07-21 11:05:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:05:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:05:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:05:58,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 507 proven. 604 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-21 11:05:59,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:02,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:03,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:03,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:03,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:04,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:04,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:04,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:04,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:04,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 509 proven. 616 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 11:06:05,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671149672] [2020-07-21 11:06:05,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:05,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:06:05,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455162681] [2020-07-21 11:06:05,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:06:05,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:05,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:06:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:06:05,690 INFO L87 Difference]: Start difference. First operand 228 states and 436 transitions. Second operand 19 states. [2020-07-21 11:06:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:06,386 INFO L93 Difference]: Finished difference Result 286 states and 545 transitions. [2020-07-21 11:06:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:06:06,389 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 11:06:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:06,393 INFO L225 Difference]: With dead ends: 286 [2020-07-21 11:06:06,394 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 11:06:06,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:06:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 11:06:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 220. [2020-07-21 11:06:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-21 11:06:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 417 transitions. [2020-07-21 11:06:06,421 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 417 transitions. Word has length 487 [2020-07-21 11:06:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:06,421 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 417 transitions. [2020-07-21 11:06:06,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:06:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 417 transitions. [2020-07-21 11:06:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:06:06,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:06,426 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:06,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:06,628 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:06,628 INFO L82 PathProgramCache]: Analyzing trace with hash -855524837, now seen corresponding path program 73 times [2020-07-21 11:06:06,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:06,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220890485] [2020-07-21 11:06:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:06:07,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 847 proven. 232 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-21 11:06:08,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:10,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:11,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:11,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:11,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:12,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:12,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:12,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:12,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:13,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 845 proven. 250 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 11:06:14,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220890485] [2020-07-21 11:06:14,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:14,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:06:14,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72596064] [2020-07-21 11:06:14,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:06:14,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:06:14,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:06:14,738 INFO L87 Difference]: Start difference. First operand 220 states and 417 transitions. Second operand 19 states. [2020-07-21 11:06:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:15,389 INFO L93 Difference]: Finished difference Result 247 states and 447 transitions. [2020-07-21 11:06:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:06:15,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 11:06:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:15,393 INFO L225 Difference]: With dead ends: 247 [2020-07-21 11:06:15,393 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 11:06:15,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:06:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 11:06:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2020-07-21 11:06:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 11:06:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 400 transitions. [2020-07-21 11:06:15,411 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 400 transitions. Word has length 475 [2020-07-21 11:06:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:15,411 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 400 transitions. [2020-07-21 11:06:15,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:06:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 400 transitions. [2020-07-21 11:06:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 11:06:15,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:15,415 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:15,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:15,616 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1058717701, now seen corresponding path program 74 times [2020-07-21 11:06:15,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:15,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518893951] [2020-07-21 11:06:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:06:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 702 proven. 128 refuted. 0 times theorem prover too weak. 5558 trivial. 0 not checked. [2020-07-21 11:06:17,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:18,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:19,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:20,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 704 proven. 136 refuted. 0 times theorem prover too weak. 5548 trivial. 0 not checked. [2020-07-21 11:06:22,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518893951] [2020-07-21 11:06:22,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:22,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 11:06:22,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402602798] [2020-07-21 11:06:22,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:06:22,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:06:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:06:22,417 INFO L87 Difference]: Start difference. First operand 215 states and 400 transitions. Second operand 15 states. [2020-07-21 11:06:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:22,877 INFO L93 Difference]: Finished difference Result 240 states and 447 transitions. [2020-07-21 11:06:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:06:22,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 474 [2020-07-21 11:06:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:22,885 INFO L225 Difference]: With dead ends: 240 [2020-07-21 11:06:22,885 INFO L226 Difference]: Without dead ends: 230 [2020-07-21 11:06:22,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:06:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-21 11:06:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2020-07-21 11:06:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 11:06:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 395 transitions. [2020-07-21 11:06:22,907 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 395 transitions. Word has length 474 [2020-07-21 11:06:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:22,907 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 395 transitions. [2020-07-21 11:06:22,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:06:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 395 transitions. [2020-07-21 11:06:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 11:06:22,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:22,913 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:23,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:23,126 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1234056320, now seen corresponding path program 75 times [2020-07-21 11:06:23,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:23,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030372349] [2020-07-21 11:06:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:06:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 805 proven. 306 refuted. 0 times theorem prover too weak. 5647 trivial. 0 not checked. [2020-07-21 11:06:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:27,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:28,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:28,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:28,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:28,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:29,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:29,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:29,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:29,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:29,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:30,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 805 proven. 320 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-21 11:06:31,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030372349] [2020-07-21 11:06:31,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:31,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:06:31,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005463229] [2020-07-21 11:06:31,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:06:31,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:31,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:06:31,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:06:31,676 INFO L87 Difference]: Start difference. First operand 212 states and 395 transitions. Second operand 19 states. [2020-07-21 11:06:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:32,406 INFO L93 Difference]: Finished difference Result 274 states and 503 transitions. [2020-07-21 11:06:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:06:32,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 11:06:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:32,410 INFO L225 Difference]: With dead ends: 274 [2020-07-21 11:06:32,410 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 11:06:32,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:06:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 11:06:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 209. [2020-07-21 11:06:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-21 11:06:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 380 transitions. [2020-07-21 11:06:32,429 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 380 transitions. Word has length 487 [2020-07-21 11:06:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:32,429 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 380 transitions. [2020-07-21 11:06:32,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:06:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 380 transitions. [2020-07-21 11:06:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:06:32,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:32,434 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:32,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:32,635 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 76 times [2020-07-21 11:06:32,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:32,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159487262] [2020-07-21 11:06:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:06:33,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 785 proven. 125 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 11:06:34,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:36,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:36,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:36,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:37,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:38,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 783 proven. 137 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 11:06:40,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159487262] [2020-07-21 11:06:40,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:40,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 11:06:40,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974141367] [2020-07-21 11:06:40,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:06:40,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:40,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:06:40,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:06:40,041 INFO L87 Difference]: Start difference. First operand 209 states and 380 transitions. Second operand 17 states. [2020-07-21 11:06:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:40,630 INFO L93 Difference]: Finished difference Result 219 states and 390 transitions. [2020-07-21 11:06:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:06:40,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 11:06:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:40,637 INFO L225 Difference]: With dead ends: 219 [2020-07-21 11:06:40,638 INFO L226 Difference]: Without dead ends: 206 [2020-07-21 11:06:40,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 11:06:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-21 11:06:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-07-21 11:06:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 11:06:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 372 transitions. [2020-07-21 11:06:40,657 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 372 transitions. Word has length 475 [2020-07-21 11:06:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:40,657 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 372 transitions. [2020-07-21 11:06:40,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:06:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 372 transitions. [2020-07-21 11:06:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 11:06:40,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:40,661 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:40,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:40,862 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1698746006, now seen corresponding path program 77 times [2020-07-21 11:06:40,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:40,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654766311] [2020-07-21 11:06:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 11:06:42,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 837 proven. 321 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2020-07-21 11:06:42,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:45,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:45,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:46,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:46,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:47,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:47,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:48,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 841 proven. 338 refuted. 0 times theorem prover too weak. 4930 trivial. 0 not checked. [2020-07-21 11:06:50,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654766311] [2020-07-21 11:06:50,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:06:50,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 11:06:50,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590088125] [2020-07-21 11:06:50,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:06:50,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:06:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:06:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:06:50,591 INFO L87 Difference]: Start difference. First operand 203 states and 372 transitions. Second operand 19 states. [2020-07-21 11:06:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:06:51,383 INFO L93 Difference]: Finished difference Result 272 states and 495 transitions. [2020-07-21 11:06:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:06:51,384 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 464 [2020-07-21 11:06:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:06:51,388 INFO L225 Difference]: With dead ends: 272 [2020-07-21 11:06:51,388 INFO L226 Difference]: Without dead ends: 257 [2020-07-21 11:06:51,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 895 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:06:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-21 11:06:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 203. [2020-07-21 11:06:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 11:06:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 372 transitions. [2020-07-21 11:06:51,407 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 372 transitions. Word has length 464 [2020-07-21 11:06:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:06:51,407 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 372 transitions. [2020-07-21 11:06:51,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:06:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 372 transitions. [2020-07-21 11:06:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:06:51,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:06:51,411 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:06:51,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:51,612 INFO L427 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:06:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:06:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash -151584039, now seen corresponding path program 78 times [2020-07-21 11:06:51,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:06:51,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131369269] [2020-07-21 11:06:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:06:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:06:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:06:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:06:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 899 proven. 341 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 11:06:53,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:06:56,706 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 11:06:57,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:57,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:58,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:59,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:59,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:59,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:06:59,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:00,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:00,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:00,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:00,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 896 proven. 365 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 11:07:02,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131369269] [2020-07-21 11:07:02,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:02,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:07:02,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945649746] [2020-07-21 11:07:02,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:07:02,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:07:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:07:02,679 INFO L87 Difference]: Start difference. First operand 203 states and 372 transitions. Second operand 21 states. [2020-07-21 11:07:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:03,738 INFO L93 Difference]: Finished difference Result 293 states and 540 transitions. [2020-07-21 11:07:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:07:03,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 11:07:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:03,743 INFO L225 Difference]: With dead ends: 293 [2020-07-21 11:07:03,743 INFO L226 Difference]: Without dead ends: 278 [2020-07-21 11:07:03,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:07:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-21 11:07:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2020-07-21 11:07:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-21 11:07:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 339 transitions. [2020-07-21 11:07:03,763 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 339 transitions. Word has length 475 [2020-07-21 11:07:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:03,763 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 339 transitions. [2020-07-21 11:07:03,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:07:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 339 transitions. [2020-07-21 11:07:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:07:03,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:07:03,767 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:07:03,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:03,968 INFO L427 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:07:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:07:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash -583811255, now seen corresponding path program 79 times [2020-07-21 11:07:03,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:07:03,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092720779] [2020-07-21 11:07:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:07:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:07:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:07:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 292 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-21 11:07:05,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:07:08,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:09,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:09,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:10,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:11,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 308 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 11:07:13,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092720779] [2020-07-21 11:07:13,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:13,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 11:07:13,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017127292] [2020-07-21 11:07:13,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 11:07:13,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:13,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 11:07:13,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 11:07:13,249 INFO L87 Difference]: Start difference. First operand 193 states and 339 transitions. Second operand 19 states. [2020-07-21 11:07:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:13,977 INFO L93 Difference]: Finished difference Result 241 states and 423 transitions. [2020-07-21 11:07:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:07:13,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 11:07:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:13,981 INFO L225 Difference]: With dead ends: 241 [2020-07-21 11:07:13,981 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 11:07:13,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 11:07:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 11:07:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2020-07-21 11:07:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 11:07:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-21 11:07:14,054 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-21 11:07:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:14,055 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-21 11:07:14,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 11:07:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-21 11:07:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 11:07:14,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:07:14,057 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:07:14,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:14,258 INFO L427 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:07:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:07:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 80 times [2020-07-21 11:07:14,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:07:14,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872179697] [2020-07-21 11:07:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:07:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:07:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:07:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1086 refuted. 0 times theorem prover too weak. 4795 trivial. 0 not checked. [2020-07-21 11:07:15,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:07:21,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:23,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:24,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:24,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:25,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-21 11:07:26,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872179697] [2020-07-21 11:07:26,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:26,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 11:07:26,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900016300] [2020-07-21 11:07:26,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:07:26,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:26,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:07:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:07:26,684 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-21 11:07:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:27,816 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-21 11:07:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:07:27,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-21 11:07:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:27,825 INFO L225 Difference]: With dead ends: 236 [2020-07-21 11:07:27,825 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 11:07:27,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:07:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 11:07:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 11:07:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 11:07:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-21 11:07:27,837 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-21 11:07:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:27,838 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-21 11:07:27,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:07:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-21 11:07:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:07:27,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:07:27,840 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:07:28,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:28,042 INFO L427 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:07:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:07:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 81 times [2020-07-21 11:07:28,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:07:28,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371150936] [2020-07-21 11:07:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:07:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:07:29,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:07:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 11:07:29,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:07:35,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:37,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:37,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:38,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:39,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 11:07:40,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371150936] [2020-07-21 11:07:40,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:40,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 11:07:40,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150405337] [2020-07-21 11:07:40,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:07:40,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:07:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:07:40,107 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-21 11:07:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:41,244 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-21 11:07:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 11:07:41,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 11:07:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:41,250 INFO L225 Difference]: With dead ends: 220 [2020-07-21 11:07:41,251 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 11:07:41,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:07:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 11:07:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-21 11:07:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 11:07:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-21 11:07:41,262 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-21 11:07:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:41,263 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-21 11:07:41,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:07:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-21 11:07:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 11:07:41,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:07:41,265 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:07:41,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:41,466 INFO L427 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:07:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:07:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 82 times [2020-07-21 11:07:41,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:07:41,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78439826] [2020-07-21 11:07:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:07:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 11:07:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:07:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-21 11:07:43,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:07:45,686 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:07:47,873 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 11:07:49,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:52,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:53,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:53,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:54,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:54,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:54,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:54,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:55,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:55,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:55,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-21 11:07:55,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78439826] [2020-07-21 11:07:55,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:07:55,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-21 11:07:55,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209492406] [2020-07-21 11:07:55,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 11:07:55,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:07:55,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 11:07:55,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-21 11:07:55,553 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-21 11:07:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:07:56,696 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-21 11:07:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:07:56,700 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-21 11:07:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:07:56,703 INFO L225 Difference]: With dead ends: 203 [2020-07-21 11:07:56,703 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:07:56,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-21 11:07:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:07:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:07:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:07:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:07:56,710 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-21 11:07:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:07:56,710 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:07:56,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 11:07:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:07:56,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:07:56,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:07:56,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:08:01,924 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 546 DAG size of output: 199 [2020-07-21 11:08:04,476 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 522 DAG size of output: 196 [2020-07-21 11:08:10,876 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 707 DAG size of output: 250 [2020-07-21 11:08:11,320 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 91 [2020-07-21 11:08:11,697 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 91 [2020-07-21 11:08:15,956 WARN L193 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 602 DAG size of output: 224 [2020-07-21 11:08:22,037 WARN L193 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 677 DAG size of output: 259 [2020-07-21 11:08:22,372 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 91 [2020-07-21 11:08:22,898 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 93 [2020-07-21 11:08:26,694 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 588 DAG size of output: 218 [2020-07-21 11:08:32,816 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 677 DAG size of output: 259 [2020-07-21 11:08:39,005 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 679 DAG size of output: 260 [2020-07-21 11:08:40,823 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 451 DAG size of output: 181 [2020-07-21 11:08:47,198 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 689 DAG size of output: 260 [2020-07-21 11:08:49,979 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 546 DAG size of output: 199 [2020-07-21 11:08:53,977 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 595 DAG size of output: 221 [2020-07-21 11:08:54,501 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 102 [2020-07-21 11:08:56,229 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 451 DAG size of output: 181 [2020-07-21 11:08:58,322 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 496 DAG size of output: 189 [2020-07-21 11:09:04,378 WARN L193 SmtUtils]: Spent 6.05 s on a formula simplification. DAG size of input: 675 DAG size of output: 260 [2020-07-21 11:09:06,859 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 522 DAG size of output: 196 [2020-07-21 11:09:13,250 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 687 DAG size of output: 259 [2020-07-21 11:09:13,676 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 90 [2020-07-21 11:09:20,051 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 707 DAG size of output: 250 [2020-07-21 11:09:26,160 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 673 DAG size of output: 259 [2020-07-21 11:09:26,363 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 77 [2020-07-21 11:09:26,617 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 78 [2020-07-21 11:09:32,826 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 679 DAG size of output: 260 [2020-07-21 11:09:38,909 WARN L193 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 679 DAG size of output: 258 [2020-07-21 11:09:45,114 WARN L193 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 677 DAG size of output: 259 [2020-07-21 11:09:45,532 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 95 [2020-07-21 11:09:51,608 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 679 DAG size of output: 258 [2020-07-21 11:09:51,721 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 63 [2020-07-21 11:09:57,852 WARN L193 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 673 DAG size of output: 259 [2020-07-21 11:10:04,408 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 675 DAG size of output: 260 [2020-07-21 11:10:07,413 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 531 DAG size of output: 198 [2020-07-21 11:10:09,853 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 508 DAG size of output: 190 [2020-07-21 11:10:11,889 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 476 DAG size of output: 187 [2020-07-21 11:10:12,039 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 66 [2020-07-21 11:10:15,335 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 569 DAG size of output: 206 [2020-07-21 11:10:21,251 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 669 DAG size of output: 258 [2020-07-21 11:10:23,730 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 520 DAG size of output: 181 [2020-07-21 11:10:26,761 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 554 DAG size of output: 202 [2020-07-21 11:10:33,197 WARN L193 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 690 DAG size of output: 260 [2020-07-21 11:10:39,202 WARN L193 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 669 DAG size of output: 258 [2020-07-21 11:10:39,752 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 94 [2020-07-21 11:10:40,170 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 90 [2020-07-21 11:10:42,977 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 546 DAG size of output: 199 [2020-07-21 11:10:46,353 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 569 DAG size of output: 206 [2020-07-21 11:10:52,233 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 665 DAG size of output: 258 [2020-07-21 11:10:55,034 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 546 DAG size of output: 199 [2020-07-21 11:10:55,298 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 85 [2020-07-21 11:10:55,918 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 118 [2020-07-21 11:10:57,932 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 476 DAG size of output: 187 [2020-07-21 11:10:59,934 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 476 DAG size of output: 187 [2020-07-21 11:11:02,224 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 500 DAG size of output: 186 [2020-07-21 11:11:03,799 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 568 DAG size of output: 231 [2020-07-21 11:11:06,095 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 499 DAG size of output: 180 [2020-07-21 11:11:06,200 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 54 [2020-07-21 11:11:12,041 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 665 DAG size of output: 258 [2020-07-21 11:11:12,456 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 90 [2020-07-21 11:11:12,871 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 90 [2020-07-21 11:11:14,742 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 473 DAG size of output: 187 [2020-07-21 11:11:20,910 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 680 DAG size of output: 259 [2020-07-21 11:11:27,424 WARN L193 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 707 DAG size of output: 250 [2020-07-21 11:11:27,963 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 105 [2020-07-21 11:11:34,402 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 711 DAG size of output: 250 [2020-07-21 11:11:34,577 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 72 [2020-07-21 11:11:35,118 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 91 [2020-07-21 11:11:35,617 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 102 [2020-07-21 11:11:35,810 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 74 [2020-07-21 11:11:39,564 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 579 DAG size of output: 207