/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_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:08:51,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:08:51,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:08:51,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:08:51,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:08:51,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:08:51,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:08:51,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:08:51,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:08:51,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:08:51,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:08:51,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:08:51,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:08:51,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:08:51,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:08:51,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:08:51,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:08:51,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:08:51,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:08:51,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:08:51,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:08:51,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:08:51,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:08:51,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:08:51,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:08:51,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:08:51,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:08:51,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:08:51,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:08:51,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:08:51,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:08:51,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:08:51,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:08:51,387 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:08:51,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:08:51,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:08:51,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:08:51,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:08:51,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:08:51,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:08:51,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:08:51,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:08:51,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:08:51,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:08:51,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:08:51,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:08:51,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:08:51,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:08:51,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:08:51,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:08:51,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:08:51,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:08:51,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:08:51,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:08:51,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:08:51,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:51,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:08:51,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:08:51,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:08:51,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:08:51,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:08:51,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:08:51,893 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:08:51,894 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:08:51,896 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 11:08:52,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e8f9208/cec559cbc9214e5cae151ddb027f80b5/FLAGfe4087871 [2020-07-20 11:08:52,783 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:08:52,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-20 11:08:52,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e8f9208/cec559cbc9214e5cae151ddb027f80b5/FLAGfe4087871 [2020-07-20 11:08:53,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7e8f9208/cec559cbc9214e5cae151ddb027f80b5 [2020-07-20 11:08:53,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:08:53,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:08:53,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:08:53,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:08:53,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:08:53,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c6e21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53, skipping insertion in model container [2020-07-20 11:08:53,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:08:53,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:08:53,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:08:53,417 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:08:53,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:08:53,466 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:08:53,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53 WrapperNode [2020-07-20 11:08:53,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:08:53,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:08:53,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:08:53,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:08:53,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... [2020-07-20 11:08:53,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:08:53,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:08:53,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:08:53,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:08:53,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:08:53,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:08:53,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:08:53,742 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:08:53,742 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:08:53,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:08:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:08:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:08:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:08:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:08:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:08:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:08:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:08:54,114 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:08:54,114 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:08:54,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:54 BoogieIcfgContainer [2020-07-20 11:08:54,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:08:54,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:08:54,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:08:54,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:08:54,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:08:53" (1/3) ... [2020-07-20 11:08:54,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c22ded8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:54, skipping insertion in model container [2020-07-20 11:08:54,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:53" (2/3) ... [2020-07-20 11:08:54,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c22ded8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:54, skipping insertion in model container [2020-07-20 11:08:54,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:54" (3/3) ... [2020-07-20 11:08:54,157 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-20 11:08:54,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:08:54,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:08:54,229 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:08:54,275 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:08:54,275 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:08:54,275 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:08:54,276 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:08:54,276 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:08:54,276 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:08:54,276 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:08:54,276 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:08:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:08:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:08:54,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:54,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:54,314 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:08:54,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:54,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460571741] [2020-07-20 11:08:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:54,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:08:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:08:54,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:08:54,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460571741] [2020-07-20 11:08:54,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:08:54,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:08:54,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015530410] [2020-07-20 11:08:54,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:08:54,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:08:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:08:54,616 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:08:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:54,831 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:08:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:08:54,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:08:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:54,854 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:08:54,855 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:08:54,863 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 [2020-07-20 11:08:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:08:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:08:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:08:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:08:54,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:08:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:54,940 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:08:54,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:08:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:08:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:08:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:54,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:55,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:55,162 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:55,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:08:55,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:55,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894420375] [2020-07-20 11:08:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:08:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:08:55,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:08:55,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894420375] [2020-07-20 11:08:55,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:08:55,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:08:55,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32198308] [2020-07-20 11:08:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:08:55,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:08:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:08:55,292 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:08:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:55,462 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:08:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:08:55,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:08:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:55,467 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:08:55,469 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:08:55,471 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 [2020-07-20 11:08:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:08:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:08:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:08:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:08:55,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:08:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:55,486 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:08:55,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:08:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:08:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:08:55,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:55,489 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] [2020-07-20 11:08:55,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:55,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:08:55,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:55,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548342224] [2020-07-20 11:08:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:08:55,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:55,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:56,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:56,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:56,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548342224] [2020-07-20 11:08:56,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:56,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:08:56,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729727772] [2020-07-20 11:08:56,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:08:56,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:08:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:08:56,397 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:08:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:56,660 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:08:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:08:56,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:08:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:56,665 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:08:56,669 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:08:56,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:08:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:08:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:08:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:08:56,695 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:08:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:56,696 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:08:56,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:08:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:08:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:08:56,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:56,699 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] [2020-07-20 11:08:56,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:56,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:08:56,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:56,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919206753] [2020-07-20 11:08:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:08:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:57,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:57,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:57,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:08:57,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919206753] [2020-07-20 11:08:57,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:57,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:08:57,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546432111] [2020-07-20 11:08:57,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:08:57,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:08:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:08:57,460 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:08:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:57,744 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:08:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:08:57,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:08:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:57,754 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:08:57,756 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:08:57,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:08:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:08:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:08:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:08:57,775 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:08:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:57,775 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:08:57,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:08:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:08:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:08:57,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:57,778 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] [2020-07-20 11:08:57,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:57,984 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:08:57,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:57,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384185749] [2020-07-20 11:08:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:08:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:58,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:58,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:58,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:08:58,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384185749] [2020-07-20 11:08:58,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:58,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:08:58,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13881240] [2020-07-20 11:08:58,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:08:58,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:08:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:58,657 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:08:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:58,906 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:08:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:58,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:08:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:58,913 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:08:58,914 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:08:58,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:08:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:08:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:08:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:08:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:08:58,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:08:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:58,929 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:08:58,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:08:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:08:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:08:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:58,932 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] [2020-07-20 11:08:59,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:59,147 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:08:59,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:59,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110729241] [2020-07-20 11:08:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:08:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:08:59,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:08:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:08:59,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:59,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:59,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:59,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:08:59,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110729241] [2020-07-20 11:08:59,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:59,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:08:59,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759339504] [2020-07-20 11:08:59,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:08:59,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:08:59,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:08:59,643 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 11:08:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:59,845 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:08:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:08:59,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 11:08:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:59,854 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:08:59,854 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:08:59,858 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 [2020-07-20 11:08:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:08:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:08:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:08:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:08:59,886 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:08:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:59,887 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:08:59,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:08:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:08:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:08:59,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:59,893 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] [2020-07-20 11:09:00,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:00,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:09:00,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:00,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411302308] [2020-07-20 11:09:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:09:00,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:00,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:00,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:00,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:00,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:09:00,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411302308] [2020-07-20 11:09:00,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:00,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:09:00,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335993240] [2020-07-20 11:09:00,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:09:00,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:09:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:09:00,826 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 11:09:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:01,056 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:09:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:01,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 11:09:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:01,060 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:09:01,060 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:09:01,061 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 [2020-07-20 11:09:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:09:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:09:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:09:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:09:01,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:09:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:01,072 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:09:01,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:09:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:09:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:09:01,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:01,074 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] [2020-07-20 11:09:01,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:01,281 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:09:01,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:01,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630562362] [2020-07-20 11:09:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 11:09:01,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:01,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:01,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:01,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:01,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:01,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:09:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630562362] [2020-07-20 11:09:01,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:01,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:09:01,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485606154] [2020-07-20 11:09:01,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:09:01,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:09:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:09:01,979 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 11:09:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:02,224 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 11:09:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:02,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 11:09:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:02,229 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:09:02,229 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:09:02,231 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 [2020-07-20 11:09:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:09:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 11:09:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:09:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:09:02,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 11:09:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:02,247 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:09:02,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:09:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:09:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 11:09:02,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:02,250 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] [2020-07-20 11:09:02,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:02,466 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 11:09:02,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:02,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136199316] [2020-07-20 11:09:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:09:02,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:03,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:09:03,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136199316] [2020-07-20 11:09:03,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:03,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:09:03,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608895110] [2020-07-20 11:09:03,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:09:03,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:09:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:09:03,699 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 11:09:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:03,978 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 11:09:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:03,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 11:09:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:03,981 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:09:03,981 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:09:03,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:09:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:09:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 11:09:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:09:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:09:03,997 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 11:09:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:03,998 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:09:03,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:09:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:09:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:09:04,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:04,002 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] [2020-07-20 11:09:04,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:04,215 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 11:09:04,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:04,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338598562] [2020-07-20 11:09:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 11:09:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:05,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 11:09:05,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338598562] [2020-07-20 11:09:05,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:05,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:05,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254343218] [2020-07-20 11:09:05,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:05,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:05,474 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states. [2020-07-20 11:09:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:05,745 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 11:09:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:05,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-20 11:09:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:05,748 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:09:05,748 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:09:05,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:09:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 11:09:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:09:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:09:05,765 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 11:09:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:05,766 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:09:05,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:09:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 11:09:05,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:05,770 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] [2020-07-20 11:09:05,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:05,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 11:09:05,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:05,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503198823] [2020-07-20 11:09:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:09:06,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 11:09:06,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:07,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:07,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:07,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:07,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:07,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 11:09:08,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503198823] [2020-07-20 11:09:08,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:08,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:09:08,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399983641] [2020-07-20 11:09:08,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:08,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:08,189 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states. [2020-07-20 11:09:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:08,555 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 11:09:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:09:08,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2020-07-20 11:09:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:08,560 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:09:08,560 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 11:09:08,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:09:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 11:09:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 11:09:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:09:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:09:08,579 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 11:09:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:08,580 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:09:08,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:09:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:09:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 11:09:08,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:08,584 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:08,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:08,798 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:08,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times [2020-07-20 11:09:08,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:08,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653092033] [2020-07-20 11:09:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 11:09:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:09,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:09,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-20 11:09:10,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653092033] [2020-07-20 11:09:10,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:10,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:10,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830644095] [2020-07-20 11:09:10,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:10,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:10,391 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states. [2020-07-20 11:09:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:10,719 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2020-07-20 11:09:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:10,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-20 11:09:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:10,725 INFO L225 Difference]: With dead ends: 99 [2020-07-20 11:09:10,726 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 11:09:10,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 11:09:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2020-07-20 11:09:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:09:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions. [2020-07-20 11:09:10,746 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148 [2020-07-20 11:09:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:10,747 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 92 transitions. [2020-07-20 11:09:10,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions. [2020-07-20 11:09:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 11:09:10,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:10,750 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 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] [2020-07-20 11:09:10,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:10,965 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-20 11:09:10,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:10,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285386760] [2020-07-20 11:09:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-20 11:09:11,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:11,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:11,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:11,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:11,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-20 11:09:11,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285386760] [2020-07-20 11:09:11,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:11,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:11,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806298734] [2020-07-20 11:09:11,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:11,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:11,920 INFO L87 Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states. [2020-07-20 11:09:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:12,134 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2020-07-20 11:09:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:12,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-07-20 11:09:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:12,138 INFO L225 Difference]: With dead ends: 99 [2020-07-20 11:09:12,138 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 11:09:12,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 11:09:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2020-07-20 11:09:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 11:09:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions. [2020-07-20 11:09:12,163 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123 [2020-07-20 11:09:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:12,164 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 98 transitions. [2020-07-20 11:09:12,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions. [2020-07-20 11:09:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-20 11:09:12,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:12,168 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:12,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:12,382 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times [2020-07-20 11:09:12,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:12,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407191081] [2020-07-20 11:09:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:09:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 292 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-07-20 11:09:12,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:13,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:13,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-07-20 11:09:14,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407191081] [2020-07-20 11:09:14,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:14,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:09:14,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629430970] [2020-07-20 11:09:14,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:14,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:14,426 INFO L87 Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states. [2020-07-20 11:09:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:14,805 INFO L93 Difference]: Finished difference Result 113 states and 271 transitions. [2020-07-20 11:09:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:09:14,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 216 [2020-07-20 11:09:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:14,808 INFO L225 Difference]: With dead ends: 113 [2020-07-20 11:09:14,808 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:09:14,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 403 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:09:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:09:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-20 11:09:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:09:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions. [2020-07-20 11:09:14,823 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216 [2020-07-20 11:09:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:14,824 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 104 transitions. [2020-07-20 11:09:14,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:09:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions. [2020-07-20 11:09:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 11:09:14,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:14,827 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:15,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:15,041 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times [2020-07-20 11:09:15,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:15,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156821897] [2020-07-20 11:09:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:15,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-20 11:09:15,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:15,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:15,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-20 11:09:16,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156821897] [2020-07-20 11:09:16,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:16,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:16,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70374737] [2020-07-20 11:09:16,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:16,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:16,308 INFO L87 Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states. [2020-07-20 11:09:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:16,609 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2020-07-20 11:09:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:16,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-20 11:09:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:16,616 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:09:16,617 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 11:09:16,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 11:09:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-07-20 11:09:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 11:09:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions. [2020-07-20 11:09:16,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135 [2020-07-20 11:09:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:16,636 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 112 transitions. [2020-07-20 11:09:16,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions. [2020-07-20 11:09:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 11:09:16,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:16,642 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:16,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:16,858 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times [2020-07-20 11:09:16,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:16,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400879804] [2020-07-20 11:09:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:09:17,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 116 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-07-20 11:09:17,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:18,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 11:09:18,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400879804] [2020-07-20 11:09:18,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:18,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:09:18,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903425392] [2020-07-20 11:09:18,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:18,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:18,835 INFO L87 Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states. [2020-07-20 11:09:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:19,267 INFO L93 Difference]: Finished difference Result 107 states and 197 transitions. [2020-07-20 11:09:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:09:19,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-07-20 11:09:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:19,272 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:09:19,272 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 11:09:19,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:09:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 11:09:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 11:09:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 11:09:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2020-07-20 11:09:19,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163 [2020-07-20 11:09:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:19,298 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2020-07-20 11:09:19,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:09:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2020-07-20 11:09:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 11:09:19,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:19,303 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:19,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:19,519 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2020-07-20 11:09:19,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:19,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593923940] [2020-07-20 11:09:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-20 11:09:19,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:20,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:20,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:20,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:20,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:20,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-07-20 11:09:20,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593923940] [2020-07-20 11:09:20,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:20,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:20,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71887444] [2020-07-20 11:09:20,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:20,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:20,585 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states. [2020-07-20 11:09:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:20,770 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-20 11:09:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:20,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-07-20 11:09:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:20,773 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:09:20,773 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 11:09:20,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 11:09:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-20 11:09:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 11:09:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-07-20 11:09:20,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136 [2020-07-20 11:09:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:20,792 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-07-20 11:09:20,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-07-20 11:09:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 11:09:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:20,796 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:21,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:21,010 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times [2020-07-20 11:09:21,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:21,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427796770] [2020-07-20 11:09:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-20 11:09:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:22,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-07-20 11:09:22,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427796770] [2020-07-20 11:09:22,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:22,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:22,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112934480] [2020-07-20 11:09:22,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:22,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:22,632 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states. [2020-07-20 11:09:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:22,887 INFO L93 Difference]: Finished difference Result 117 states and 203 transitions. [2020-07-20 11:09:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:22,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-20 11:09:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:22,891 INFO L225 Difference]: With dead ends: 117 [2020-07-20 11:09:22,891 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 11:09:22,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 271 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 11:09:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-20 11:09:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:09:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-20 11:09:22,904 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148 [2020-07-20 11:09:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:22,905 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-20 11:09:22,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-20 11:09:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-20 11:09:22,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:22,908 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:23,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:23,124 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times [2020-07-20 11:09:23,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:23,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723334201] [2020-07-20 11:09:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-20 11:09:23,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:23,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:23,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:23,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:24,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:24,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:24,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:24,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 11:09:24,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723334201] [2020-07-20 11:09:24,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:24,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:24,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980131649] [2020-07-20 11:09:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:24,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:24,191 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-20 11:09:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:24,406 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2020-07-20 11:09:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:24,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2020-07-20 11:09:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:24,410 INFO L225 Difference]: With dead ends: 114 [2020-07-20 11:09:24,410 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 11:09:24,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 11:09:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-07-20 11:09:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:09:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-20 11:09:24,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149 [2020-07-20 11:09:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:24,428 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-20 11:09:24,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-20 11:09:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 11:09:24,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:24,431 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:24,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:24,645 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times [2020-07-20 11:09:24,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:24,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523810645] [2020-07-20 11:09:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-20 11:09:24,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:25,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:25,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:25,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:25,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:25,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 11:09:25,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523810645] [2020-07-20 11:09:25,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:25,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:25,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311288913] [2020-07-20 11:09:25,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:25,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:25,698 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-20 11:09:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:25,882 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2020-07-20 11:09:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:25,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2020-07-20 11:09:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:25,885 INFO L225 Difference]: With dead ends: 106 [2020-07-20 11:09:25,885 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 11:09:25,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 11:09:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-20 11:09:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 11:09:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions. [2020-07-20 11:09:25,898 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150 [2020-07-20 11:09:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:25,898 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 161 transitions. [2020-07-20 11:09:25,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions. [2020-07-20 11:09:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-20 11:09:25,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:25,901 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:26,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:26,117 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times [2020-07-20 11:09:26,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:26,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658877894] [2020-07-20 11:09:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:26,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-20 11:09:26,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:27,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2020-07-20 11:09:27,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658877894] [2020-07-20 11:09:27,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:27,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:27,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543194188] [2020-07-20 11:09:27,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:27,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:27,588 INFO L87 Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states. [2020-07-20 11:09:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:27,810 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-20 11:09:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:27,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 162 [2020-07-20 11:09:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:27,817 INFO L225 Difference]: With dead ends: 117 [2020-07-20 11:09:27,817 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 11:09:27,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 11:09:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-20 11:09:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 11:09:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions. [2020-07-20 11:09:27,831 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162 [2020-07-20 11:09:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:27,831 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 158 transitions. [2020-07-20 11:09:27,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions. [2020-07-20 11:09:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-20 11:09:27,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:27,835 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:28,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:28,049 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times [2020-07-20 11:09:28,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:28,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163096003] [2020-07-20 11:09:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:28,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-07-20 11:09:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:28,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:28,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:28,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:28,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:28,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:28,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:29,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-20 11:09:29,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163096003] [2020-07-20 11:09:29,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:29,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:29,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833309076] [2020-07-20 11:09:29,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:29,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:29,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:29,208 INFO L87 Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states. [2020-07-20 11:09:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:29,416 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2020-07-20 11:09:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:29,421 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-07-20 11:09:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:29,425 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:09:29,425 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 11:09:29,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 11:09:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-07-20 11:09:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 11:09:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-20 11:09:29,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163 [2020-07-20 11:09:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:29,451 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-20 11:09:29,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-20 11:09:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-20 11:09:29,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:29,455 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:29,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:29,671 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times [2020-07-20 11:09:29,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:29,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676531501] [2020-07-20 11:09:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:09:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-20 11:09:29,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:30,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:30,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:30,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:30,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-07-20 11:09:30,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676531501] [2020-07-20 11:09:30,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:30,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 11:09:30,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731632244] [2020-07-20 11:09:30,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:09:30,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:09:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:09:30,612 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states. [2020-07-20 11:09:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:30,762 INFO L93 Difference]: Finished difference Result 131 states and 225 transitions. [2020-07-20 11:09:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:09:30,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 164 [2020-07-20 11:09:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:30,765 INFO L225 Difference]: With dead ends: 131 [2020-07-20 11:09:30,765 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 11:09:30,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:09:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 11:09:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-07-20 11:09:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 11:09:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2020-07-20 11:09:30,779 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164 [2020-07-20 11:09:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:30,779 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2020-07-20 11:09:30,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:09:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2020-07-20 11:09:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-20 11:09:30,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:30,783 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:30,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:30,997 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times [2020-07-20 11:09:30,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:31,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278101724] [2020-07-20 11:09:31,000 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 [2020-07-20 11:09:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:09:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-07-20 11:09:31,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:31,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:31,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:31,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:31,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:31,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-20 11:09:32,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278101724] [2020-07-20 11:09:32,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:32,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:09:32,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222443621] [2020-07-20 11:09:32,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:09:32,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:32,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:09:32,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:09:32,084 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states. [2020-07-20 11:09:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:32,257 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2020-07-20 11:09:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:09:32,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-07-20 11:09:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:32,261 INFO L225 Difference]: With dead ends: 110 [2020-07-20 11:09:32,261 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 11:09:32,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 11:09:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-07-20 11:09:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 11:09:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-20 11:09:32,271 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176 [2020-07-20 11:09:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:32,271 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-20 11:09:32,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:09:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-20 11:09:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-20 11:09:32,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:32,274 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:32,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:32,490 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times [2020-07-20 11:09:32,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:32,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315507771] [2020-07-20 11:09:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:09:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:32,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:32,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 47 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-07-20 11:09:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:33,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:33,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:33,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:33,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:33,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:33,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-20 11:09:34,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315507771] [2020-07-20 11:09:34,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:34,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:34,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593464480] [2020-07-20 11:09:34,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:34,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:34,005 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states. [2020-07-20 11:09:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:34,274 INFO L93 Difference]: Finished difference Result 123 states and 202 transitions. [2020-07-20 11:09:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:34,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-20 11:09:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:34,279 INFO L225 Difference]: With dead ends: 123 [2020-07-20 11:09:34,280 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 11:09:34,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 11:09:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-20 11:09:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 11:09:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-20 11:09:34,297 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191 [2020-07-20 11:09:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:34,297 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-20 11:09:34,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-20 11:09:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-20 11:09:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:34,301 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:34,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:34,516 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times [2020-07-20 11:09:34,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:34,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630794053] [2020-07-20 11:09:34,518 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 [2020-07-20 11:09:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:09:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 102 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2020-07-20 11:09:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:35,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:35,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-07-20 11:09:36,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630794053] [2020-07-20 11:09:36,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:36,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:09:36,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016818234] [2020-07-20 11:09:36,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:36,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:36,682 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states. [2020-07-20 11:09:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:37,056 INFO L93 Difference]: Finished difference Result 121 states and 205 transitions. [2020-07-20 11:09:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:09:37,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2020-07-20 11:09:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:37,059 INFO L225 Difference]: With dead ends: 121 [2020-07-20 11:09:37,059 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 11:09:37,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:09:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 11:09:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-07-20 11:09:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 11:09:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2020-07-20 11:09:37,073 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204 [2020-07-20 11:09:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:37,073 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2020-07-20 11:09:37,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:09:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2020-07-20 11:09:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 11:09:37,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:37,076 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:37,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:37,291 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times [2020-07-20 11:09:37,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:37,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842755181] [2020-07-20 11:09:37,293 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 [2020-07-20 11:09:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-20 11:09:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 11:09:38,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-20 11:09:40,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842755181] [2020-07-20 11:09:40,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:40,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 11:09:40,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871022695] [2020-07-20 11:09:40,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 11:09:40,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 11:09:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 11:09:40,252 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand 36 states. [2020-07-20 11:09:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:41,233 INFO L93 Difference]: Finished difference Result 226 states and 521 transitions. [2020-07-20 11:09:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 11:09:41,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-20 11:09:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:41,243 INFO L225 Difference]: With dead ends: 226 [2020-07-20 11:09:41,243 INFO L226 Difference]: Without dead ends: 219 [2020-07-20 11:09:41,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 11:09:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-20 11:09:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2020-07-20 11:09:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-20 11:09:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2020-07-20 11:09:41,294 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 177 [2020-07-20 11:09:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:41,295 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2020-07-20 11:09:41,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 11:09:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2020-07-20 11:09:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-20 11:09:41,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:41,301 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:41,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:41,516 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1104223868, now seen corresponding path program 15 times [2020-07-20 11:09:41,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:41,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550823641] [2020-07-20 11:09:41,518 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 [2020-07-20 11:09:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 148 proven. 142 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-07-20 11:09:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:42,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:42,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:42,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 148 proven. 152 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 11:09:43,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550823641] [2020-07-20 11:09:43,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:43,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:43,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624358117] [2020-07-20 11:09:43,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:43,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:43,321 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 15 states. [2020-07-20 11:09:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:43,656 INFO L93 Difference]: Finished difference Result 205 states and 526 transitions. [2020-07-20 11:09:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:43,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-20 11:09:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:43,661 INFO L225 Difference]: With dead ends: 205 [2020-07-20 11:09:43,661 INFO L226 Difference]: Without dead ends: 173 [2020-07-20 11:09:43,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-20 11:09:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2020-07-20 11:09:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-20 11:09:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 344 transitions. [2020-07-20 11:09:43,696 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 344 transitions. Word has length 191 [2020-07-20 11:09:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:43,696 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 344 transitions. [2020-07-20 11:09:43,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 344 transitions. [2020-07-20 11:09:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 11:09:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:43,702 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:43,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:43,916 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1441264276, now seen corresponding path program 16 times [2020-07-20 11:09:43,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880802777] [2020-07-20 11:09:43,918 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 [2020-07-20 11:09:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 93 proven. 203 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-20 11:09:44,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:45,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 97 proven. 207 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-07-20 11:09:45,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880802777] [2020-07-20 11:09:45,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:45,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:45,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924222424] [2020-07-20 11:09:45,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:45,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:45,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:45,587 INFO L87 Difference]: Start difference. First operand 154 states and 344 transitions. Second operand 15 states. [2020-07-20 11:09:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:45,850 INFO L93 Difference]: Finished difference Result 205 states and 460 transitions. [2020-07-20 11:09:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:45,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 11:09:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:45,854 INFO L225 Difference]: With dead ends: 205 [2020-07-20 11:09:45,854 INFO L226 Difference]: Without dead ends: 154 [2020-07-20 11:09:45,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 355 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-20 11:09:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2020-07-20 11:09:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 11:09:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 314 transitions. [2020-07-20 11:09:45,881 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 314 transitions. Word has length 190 [2020-07-20 11:09:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:45,881 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 314 transitions. [2020-07-20 11:09:45,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-07-20 11:09:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-20 11:09:45,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:45,888 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 12, 11, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:46,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:46,103 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2034664010, now seen corresponding path program 17 times [2020-07-20 11:09:46,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:46,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138626097] [2020-07-20 11:09:46,105 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 [2020-07-20 11:09:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-07-20 11:09:46,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:47,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 192 proven. 177 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-07-20 11:09:47,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138626097] [2020-07-20 11:09:47,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:47,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:47,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179972917] [2020-07-20 11:09:47,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:47,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:47,968 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 15 states. [2020-07-20 11:09:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:48,362 INFO L93 Difference]: Finished difference Result 203 states and 459 transitions. [2020-07-20 11:09:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:48,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 216 [2020-07-20 11:09:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:48,370 INFO L225 Difference]: With dead ends: 203 [2020-07-20 11:09:48,370 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 11:09:48,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 407 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 11:09:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-20 11:09:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-20 11:09:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 320 transitions. [2020-07-20 11:09:48,404 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 320 transitions. Word has length 216 [2020-07-20 11:09:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:48,405 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 320 transitions. [2020-07-20 11:09:48,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 320 transitions. [2020-07-20 11:09:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 11:09:48,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:48,411 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:48,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:48,627 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1663576742, now seen corresponding path program 18 times [2020-07-20 11:09:48,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:48,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361347562] [2020-07-20 11:09:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:09:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:09:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 229 proven. 61 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 11:09:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:49,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:49,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:49,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:49,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 231 proven. 67 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-20 11:09:50,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361347562] [2020-07-20 11:09:50,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:50,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:09:50,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297363574] [2020-07-20 11:09:50,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:50,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:50,581 INFO L87 Difference]: Start difference. First operand 154 states and 320 transitions. Second operand 15 states. [2020-07-20 11:09:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:50,939 INFO L93 Difference]: Finished difference Result 185 states and 377 transitions. [2020-07-20 11:09:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:50,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 11:09:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:50,945 INFO L225 Difference]: With dead ends: 185 [2020-07-20 11:09:50,946 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 11:09:50,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 355 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:09:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 11:09:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 149. [2020-07-20 11:09:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 11:09:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 310 transitions. [2020-07-20 11:09:50,988 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 310 transitions. Word has length 190 [2020-07-20 11:09:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:50,989 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 310 transitions. [2020-07-20 11:09:50,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 310 transitions. [2020-07-20 11:09:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:09:51,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:51,001 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:51,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:51,216 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1674908912, now seen corresponding path program 19 times [2020-07-20 11:09:51,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:51,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698471806] [2020-07-20 11:09:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:09:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:09:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 124 proven. 130 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-20 11:09:51,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:52,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:52,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 125 proven. 133 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 11:09:53,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698471806] [2020-07-20 11:09:53,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:53,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 11:09:53,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856980989] [2020-07-20 11:09:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:09:53,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:09:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:09:53,564 INFO L87 Difference]: Start difference. First operand 149 states and 310 transitions. Second operand 15 states. [2020-07-20 11:09:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:53,948 INFO L93 Difference]: Finished difference Result 196 states and 432 transitions. [2020-07-20 11:09:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:09:53,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 11:09:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:53,955 INFO L225 Difference]: With dead ends: 196 [2020-07-20 11:09:53,955 INFO L226 Difference]: Without dead ends: 161 [2020-07-20 11:09:53,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:09:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-07-20 11:09:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-07-20 11:09:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 11:09:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 310 transitions. [2020-07-20 11:09:53,984 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 310 transitions. Word has length 189 [2020-07-20 11:09:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:53,986 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 310 transitions. [2020-07-20 11:09:53,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:09:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 310 transitions. [2020-07-20 11:09:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-20 11:09:53,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:53,992 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 10, 10, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:54,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:54,207 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1688311998, now seen corresponding path program 20 times [2020-07-20 11:09:54,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:54,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760711868] [2020-07-20 11:09:54,210 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 [2020-07-20 11:09:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:09:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 115 proven. 238 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2020-07-20 11:09:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:55,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 115 proven. 246 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-07-20 11:09:56,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760711868] [2020-07-20 11:09:56,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:56,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:09:56,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808639051] [2020-07-20 11:09:56,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:56,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:56,811 INFO L87 Difference]: Start difference. First operand 149 states and 310 transitions. Second operand 17 states. [2020-07-20 11:09:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:57,278 INFO L93 Difference]: Finished difference Result 200 states and 420 transitions. [2020-07-20 11:09:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:09:57,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 213 [2020-07-20 11:09:57,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:57,285 INFO L225 Difference]: With dead ends: 200 [2020-07-20 11:09:57,285 INFO L226 Difference]: Without dead ends: 149 [2020-07-20 11:09:57,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 399 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:09:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-07-20 11:09:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-07-20 11:09:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 11:09:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 299 transitions. [2020-07-20 11:09:57,320 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 299 transitions. Word has length 213 [2020-07-20 11:09:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:57,320 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 299 transitions. [2020-07-20 11:09:57,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:09:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 299 transitions. [2020-07-20 11:09:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:09:57,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:57,327 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:57,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:57,543 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1915119264, now seen corresponding path program 21 times [2020-07-20 11:09:57,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:57,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729234977] [2020-07-20 11:09:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:09:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:09:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 151 proven. 152 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-20 11:09:58,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:59,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 149 proven. 162 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-20 11:09:59,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729234977] [2020-07-20 11:09:59,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:59,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:09:59,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142509000] [2020-07-20 11:09:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:09:59,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:09:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:09:59,947 INFO L87 Difference]: Start difference. First operand 149 states and 299 transitions. Second operand 17 states. [2020-07-20 11:10:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:00,603 INFO L93 Difference]: Finished difference Result 187 states and 370 transitions. [2020-07-20 11:10:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:10:00,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-20 11:10:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:00,610 INFO L225 Difference]: With dead ends: 187 [2020-07-20 11:10:00,610 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 11:10:00,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:10:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 11:10:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 143. [2020-07-20 11:10:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-20 11:10:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 273 transitions. [2020-07-20 11:10:00,644 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 273 transitions. Word has length 189 [2020-07-20 11:10:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:00,645 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 273 transitions. [2020-07-20 11:10:00,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:10:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 273 transitions. [2020-07-20 11:10:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 11:10:00,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:00,652 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:00,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:00,865 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1483992651, now seen corresponding path program 22 times [2020-07-20 11:10:00,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:00,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774979315] [2020-07-20 11:10:00,867 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 [2020-07-20 11:10:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:10:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 239 proven. 90 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2020-07-20 11:10:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:02,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:02,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:02,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:03,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:03,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:03,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:03,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 237 proven. 100 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-20 11:10:03,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774979315] [2020-07-20 11:10:03,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:03,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:10:03,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292019460] [2020-07-20 11:10:03,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:10:03,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:10:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:10:03,693 INFO L87 Difference]: Start difference. First operand 143 states and 273 transitions. Second operand 17 states. [2020-07-20 11:10:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:04,160 INFO L93 Difference]: Finished difference Result 177 states and 332 transitions. [2020-07-20 11:10:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:10:04,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 201 [2020-07-20 11:10:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:04,164 INFO L225 Difference]: With dead ends: 177 [2020-07-20 11:10:04,165 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 11:10:04,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 375 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:10:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 11:10:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2020-07-20 11:10:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-20 11:10:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 242 transitions. [2020-07-20 11:10:04,192 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 242 transitions. Word has length 201 [2020-07-20 11:10:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:04,193 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 242 transitions. [2020-07-20 11:10:04,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:10:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 242 transitions. [2020-07-20 11:10:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:10:04,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:04,197 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:04,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:04,413 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1838391522, now seen corresponding path program 23 times [2020-07-20 11:10:04,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:04,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496618827] [2020-07-20 11:10:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 11:10:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:10:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 198 proven. 54 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-07-20 11:10:04,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:05,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:05,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:05,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:05,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:05,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:05,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:06,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 197 proven. 61 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 11:10:06,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496618827] [2020-07-20 11:10:06,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:06,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 11:10:06,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287345779] [2020-07-20 11:10:06,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:10:06,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:06,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:10:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:10:06,333 INFO L87 Difference]: Start difference. First operand 133 states and 242 transitions. Second operand 15 states. [2020-07-20 11:10:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:06,894 INFO L93 Difference]: Finished difference Result 165 states and 305 transitions. [2020-07-20 11:10:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:10:06,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 11:10:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:06,901 INFO L225 Difference]: With dead ends: 165 [2020-07-20 11:10:06,901 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 11:10:06,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:10:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 11:10:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2020-07-20 11:10:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-20 11:10:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 227 transitions. [2020-07-20 11:10:06,931 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 227 transitions. Word has length 189 [2020-07-20 11:10:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:06,933 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 227 transitions. [2020-07-20 11:10:06,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:10:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 227 transitions. [2020-07-20 11:10:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:10:06,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:06,940 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:07,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:07,155 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:07,156 INFO L82 PathProgramCache]: Analyzing trace with hash -140375518, now seen corresponding path program 24 times [2020-07-20 11:10:07,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:07,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622352260] [2020-07-20 11:10:07,157 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 [2020-07-20 11:10:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:10:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 211 proven. 43 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-20 11:10:07,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:08,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-20 11:10:08,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622352260] [2020-07-20 11:10:08,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:08,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-20 11:10:08,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046663792] [2020-07-20 11:10:08,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:10:08,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:10:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:10:08,942 INFO L87 Difference]: Start difference. First operand 125 states and 227 transitions. Second operand 15 states. [2020-07-20 11:10:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:09,258 INFO L93 Difference]: Finished difference Result 144 states and 253 transitions. [2020-07-20 11:10:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:10:09,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-20 11:10:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:09,262 INFO L225 Difference]: With dead ends: 144 [2020-07-20 11:10:09,262 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 11:10:09,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:10:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 11:10:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-07-20 11:10:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 11:10:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 192 transitions. [2020-07-20 11:10:09,280 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 192 transitions. Word has length 189 [2020-07-20 11:10:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:09,281 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 192 transitions. [2020-07-20 11:10:09,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:10:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 192 transitions. [2020-07-20 11:10:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-20 11:10:09,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:09,284 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:09,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:09,498 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2096855727, now seen corresponding path program 25 times [2020-07-20 11:10:09,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:09,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626623854] [2020-07-20 11:10:09,501 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 [2020-07-20 11:10:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:10:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 69 proven. 241 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-07-20 11:10:09,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:11,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:11,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:11,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 73 proven. 251 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-07-20 11:10:12,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626623854] [2020-07-20 11:10:12,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:12,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:10:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702930495] [2020-07-20 11:10:12,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:10:12,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:10:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:10:12,333 INFO L87 Difference]: Start difference. First operand 107 states and 192 transitions. Second operand 17 states. [2020-07-20 11:10:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:12,911 INFO L93 Difference]: Finished difference Result 168 states and 323 transitions. [2020-07-20 11:10:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:10:12,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 178 [2020-07-20 11:10:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:12,916 INFO L225 Difference]: With dead ends: 168 [2020-07-20 11:10:12,917 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 11:10:12,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 327 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:10:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 11:10:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-20 11:10:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 11:10:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2020-07-20 11:10:12,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 178 [2020-07-20 11:10:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:12,935 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2020-07-20 11:10:12,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:10:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2020-07-20 11:10:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:10:12,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:12,938 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:13,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:13,152 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1148569106, now seen corresponding path program 26 times [2020-07-20 11:10:13,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:13,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445521784] [2020-07-20 11:10:13,153 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 [2020-07-20 11:10:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:10:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-20 11:10:13,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:14,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:14,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 220 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-20 11:10:15,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445521784] [2020-07-20 11:10:15,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:15,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:10:15,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943991281] [2020-07-20 11:10:15,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:10:15,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:10:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:10:15,626 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand 17 states. [2020-07-20 11:10:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:16,133 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-07-20 11:10:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:10:16,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-20 11:10:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:16,137 INFO L225 Difference]: With dead ends: 152 [2020-07-20 11:10:16,138 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 11:10:16,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:10:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 11:10:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-07-20 11:10:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 11:10:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-20 11:10:16,152 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 189 [2020-07-20 11:10:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:16,152 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-20 11:10:16,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:10:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-20 11:10:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-20 11:10:16,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:10:16,155 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:10:16,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:16,369 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:10:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:10:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 27 times [2020-07-20 11:10:16,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:10:16,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092434031] [2020-07-20 11:10:16,371 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 [2020-07-20 11:10:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:10:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:10:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 89 proven. 260 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-20 11:10:16,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:18,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:18,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:18,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:19,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:19,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:19,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:19,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 87 proven. 276 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-07-20 11:10:19,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092434031] [2020-07-20 11:10:19,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:10:19,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:10:19,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815345361] [2020-07-20 11:10:19,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:10:19,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:10:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:10:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:10:19,545 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 19 states. [2020-07-20 11:10:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:10:20,157 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-07-20 11:10:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:10:20,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-07-20 11:10:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:10:20,160 INFO L225 Difference]: With dead ends: 137 [2020-07-20 11:10:20,160 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:10:20,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 347 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:10:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:10:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:10:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:10:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:10:20,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-07-20 11:10:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:10:20,167 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:10:20,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:10:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:10:20,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:10:20,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:10:20,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:10:21,791 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:22,112 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 40 [2020-07-20 11:10:22,668 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:22,834 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 55 [2020-07-20 11:10:23,104 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 43 [2020-07-20 11:10:23,376 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 43 [2020-07-20 11:10:23,542 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 29 [2020-07-20 11:10:23,767 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 43 [2020-07-20 11:10:24,249 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 46 [2020-07-20 11:10:24,468 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:24,665 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 46 [2020-07-20 11:10:24,991 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 43 [2020-07-20 11:10:25,226 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:25,462 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 43 [2020-07-20 11:10:25,608 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 46 [2020-07-20 11:10:25,775 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 46 [2020-07-20 11:10:25,892 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 42 [2020-07-20 11:10:26,017 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 46 [2020-07-20 11:10:26,132 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 40 [2020-07-20 11:10:26,401 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:26,792 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 43 [2020-07-20 11:10:26,955 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 46 [2020-07-20 11:10:27,173 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 66 [2020-07-20 11:10:27,330 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 46 [2020-07-20 11:10:27,577 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 43 [2020-07-20 11:10:27,797 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 46 [2020-07-20 11:10:27,922 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 46 [2020-07-20 11:10:28,237 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-20 11:10:28,593 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:28,827 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 67 [2020-07-20 11:10:29,137 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:29,282 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 73 [2020-07-20 11:10:29,493 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 66 [2020-07-20 11:10:29,917 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:30,206 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 72 [2020-07-20 11:10:30,361 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-20 11:10:30,533 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-20 11:10:30,850 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:31,176 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 67 [2020-07-20 11:10:31,364 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 67 [2020-07-20 11:10:31,706 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:31,887 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 67 [2020-07-20 11:10:32,068 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 67 [2020-07-20 11:10:32,212 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-20 11:10:32,529 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 72 [2020-07-20 11:10:32,852 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:33,136 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 72 [2020-07-20 11:10:33,415 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 72 [2020-07-20 11:10:33,560 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 44 [2020-07-20 11:10:33,896 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:34,191 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 67 [2020-07-20 11:10:34,360 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 51 [2020-07-20 11:10:34,648 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 41 [2020-07-20 11:10:34,965 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:35,130 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-20 11:10:35,498 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 85 [2020-07-20 11:10:35,703 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 66 [2020-07-20 11:10:35,854 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 51 [2020-07-20 11:10:36,003 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 45 [2020-07-20 11:10:36,137 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 44 [2020-07-20 11:10:37,489 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 116 DAG size of output: 27 [2020-07-20 11:10:38,742 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 129 DAG size of output: 29 [2020-07-20 11:10:38,750 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:10:38,751 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:10:38,751 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:10:38,751 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:10:38,751 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:10:38,751 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:10:38,751 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 11:10:38,751 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 11:10:38,752 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 11:10:38,752 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 11:10:38,752 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 11:10:38,752 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 11:10:38,752 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-20 11:10:38,753 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 11:10:38,753 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 11:10:38,753 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 11:10:38,753 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-20 11:10:38,754 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 11:10:38,754 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= 5 |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| 3))) (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|) (or .cse0 .cse1 (= 2 |fibo2_#t~ret2|)) (or (and (= 3 |fibo2_#t~ret2|) .cse0) (<= 6 |fibo2_#in~n|) (and (= 1 |fibo2_#t~ret2|) .cse1) (and (<= 4 |fibo2_#in~n|) (<= |fibo2_#in~n| 4))))) [2020-07-20 11:10:38,754 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 11:10:38,755 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 11:10:38,755 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 11:10:38,755 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 11:10:38,755 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 11:10:38,755 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 11:10:38,756 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-20 11:10:38,756 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 11:10:38,756 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse2 (= 1 |fibo1_#t~ret0|))) (let ((.cse0 (and (<= |fibo1_#in~n| 2) .cse2)) (.cse1 (and (<= 3 |fibo1_#in~n|) .cse2 (<= |fibo1_#in~n| 3)))) (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (or .cse0 .cse1 (<= 4 |fibo1_#in~n|)) (or (= 5 |fibo1_#t~ret0|) (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5)) (<= |fibo1_#in~n| fibo1_~n) (or (<= 5 |fibo1_#in~n|) .cse0 (= 2 |fibo1_#t~ret0|) .cse1)))) [2020-07-20 11:10:38,756 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 11:10:38,756 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 11:10:38,756 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 11:10:38,757 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 11:10:38,757 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 11:10:38,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:10:38 BoogieIcfgContainer [2020-07-20 11:10:38,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:10:38,772 INFO L168 Benchmark]: Toolchain (without parser) took 105675.32 ms. Allocated memory was 139.5 MB in the beginning and 965.2 MB in the end (delta: 825.8 MB). Free memory was 104.8 MB in the beginning and 146.0 MB in the end (delta: -41.2 MB). Peak memory consumption was 855.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,773 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.16 ms. Allocated memory is still 139.5 MB. Free memory was 104.6 MB in the beginning and 95.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,774 INFO L168 Benchmark]: Boogie Preprocessor took 172.93 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 95.0 MB in the beginning and 182.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,774 INFO L168 Benchmark]: RCFGBuilder took 491.73 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 169.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,775 INFO L168 Benchmark]: TraceAbstraction took 104626.33 ms. Allocated memory was 203.4 MB in the beginning and 965.2 MB in the end (delta: 761.8 MB). Free memory was 169.1 MB in the beginning and 146.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 855.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:10:38,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.16 ms. Allocated memory is still 139.5 MB. Free memory was 104.6 MB in the beginning and 95.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 172.93 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 95.0 MB in the beginning and 182.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.73 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 169.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 104626.33 ms. Allocated memory was 203.4 MB in the beginning and 965.2 MB in the end (delta: 761.8 MB). Free memory was 169.1 MB in the beginning and 146.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 855.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 86.0s, OverallIterations: 40, TraceHistogramMax: 18, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 18.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1190 SDtfs, 1446 SDslu, 8522 SDs, 0 SdLazy, 7745 SolverSat, 1073 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11683 GetRequests, 10631 SyntacticMatches, 366 SemanticMatches, 686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 11.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 40 MinimizatonAttempts, 701 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 263 PreInvPairs, 6049 NumberOfFragments, 143 HoareAnnotationTreeSize, 263 FomulaSimplifications, 745530952 FormulaSimplificationTreeSizeReduction, 15.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 26263 FormulaSimplificationTreeSizeReductionInter, 2.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 55.1s InterpolantComputationTime, 5777 NumberOfCodeBlocks, 5777 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 11449 ConstructedInterpolants, 0 QuantifiedInterpolants, 3195207 SizeOfPredicates, 209 NumberOfNonLiveVariables, 12878 ConjunctsInSsa, 529 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 41470/50126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...