/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:56:27,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:27,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:27,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:27,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:27,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:27,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:27,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:27,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:27,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:27,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:27,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:27,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:27,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:27,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:27,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:27,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:27,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:27,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:27,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:27,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:27,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:27,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:27,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:27,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:56:27,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:56:27,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:56:27,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:56:27,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:56:27,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:56:27,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:56:27,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:56:27,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:56:27,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:56:27,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:56:27,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:56:27,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:56:27,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:56:27,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:27,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:27,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:27,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:56:27,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:27,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:27,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:27,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:27,471 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:27,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:27,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:27,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:27,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:27,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:27,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:27,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:27,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:27,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:27,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:27,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:27,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:27,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:27,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:27,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:27,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:27,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:27,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:27,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:27,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:27,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:27,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:27,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:27,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:27,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 12:56:27,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:27,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:27,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:27,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:27,873 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:27,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 12:56:27,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aba6f8ad/2eb374585b394e7785400bf875551d1f/FLAG6f73c549a [2020-07-21 12:56:28,445 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:28,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 12:56:28,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aba6f8ad/2eb374585b394e7785400bf875551d1f/FLAG6f73c549a [2020-07-21 12:56:28,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aba6f8ad/2eb374585b394e7785400bf875551d1f [2020-07-21 12:56:28,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:28,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:28,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:28,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:28,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:28,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbc84fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28, skipping insertion in model container [2020-07-21 12:56:28,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:28,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:29,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:29,125 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:29,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:29,160 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:29,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29 WrapperNode [2020-07-21 12:56:29,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:29,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:29,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:29,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:29,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... [2020-07-21 12:56:29,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:29,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:29,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:29,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:29,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:29,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 12:56:29,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 12:56:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:29,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:29,522 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:29,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:29 BoogieIcfgContainer [2020-07-21 12:56:29,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:29,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:29,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:29,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:29,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:28" (1/3) ... [2020-07-21 12:56:29,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b18125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:29, skipping insertion in model container [2020-07-21 12:56:29,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:29" (2/3) ... [2020-07-21 12:56:29,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b18125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:29, skipping insertion in model container [2020-07-21 12:56:29,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:29" (3/3) ... [2020-07-21 12:56:29,536 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 12:56:29,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:29,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:29,572 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:29,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:29,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:29,600 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:29,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:29,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:29,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:29,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:29,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 12:56:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 12:56:29,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:29,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:29,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 12:56:29,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:29,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189410507] [2020-07-21 12:56:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:56:29,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:29,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189410507] [2020-07-21 12:56:29,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:29,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:29,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117318105] [2020-07-21 12:56:29,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:29,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:29,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:29,881 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 12:56:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:29,989 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 12:56:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:29,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 12:56:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:30,002 INFO L225 Difference]: With dead ends: 33 [2020-07-21 12:56:30,002 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 12:56:30,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 12:56:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 12:56:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 12:56:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 12:56:30,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 12:56:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:30,051 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 12:56:30,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 12:56:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:56:30,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:30,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:30,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,264 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 12:56:30,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:30,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443436260] [2020-07-21 12:56:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:56:30,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:30,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443436260] [2020-07-21 12:56:30,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:30,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:30,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383469009] [2020-07-21 12:56:30,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:30,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:30,375 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 12:56:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:30,476 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 12:56:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:30,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 12:56:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:30,478 INFO L225 Difference]: With dead ends: 27 [2020-07-21 12:56:30,479 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 12:56:30,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 12:56:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 12:56:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 12:56:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 12:56:30,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 12:56:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:30,490 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 12:56:30,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 12:56:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 12:56:30,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:30,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:30,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,710 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 12:56:30,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:30,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880983503] [2020-07-21 12:56:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:56:30,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:31,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880983503] [2020-07-21 12:56:31,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:31,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 12:56:31,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097290642] [2020-07-21 12:56:31,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:56:31,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:56:31,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:31,089 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 12:56:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:31,208 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 12:56:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:31,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 12:56:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:31,211 INFO L225 Difference]: With dead ends: 32 [2020-07-21 12:56:31,211 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:56:31,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:56:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 12:56:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 12:56:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 12:56:31,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 12:56:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:31,222 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 12:56:31,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:56:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 12:56:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:56:31,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:31,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:31,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:31,438 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 12:56:31,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:31,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190370326] [2020-07-21 12:56:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:31,472 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:31,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 12:56:31,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:31,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:31,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190370326] [2020-07-21 12:56:31,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:31,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 12:56:31,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071284164] [2020-07-21 12:56:31,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:56:31,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:31,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:56:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:31,737 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 12:56:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:31,813 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 12:56:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:31,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 12:56:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:31,816 INFO L225 Difference]: With dead ends: 37 [2020-07-21 12:56:31,816 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 12:56:31,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 12:56:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 12:56:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 12:56:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 12:56:31,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 12:56:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:31,827 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 12:56:31,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:56:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 12:56:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 12:56:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:31,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:32,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:32,046 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 12:56:32,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:32,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347423568] [2020-07-21 12:56:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:56:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 12:56:32,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:32,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 12:56:32,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347423568] [2020-07-21 12:56:32,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:32,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 12:56:32,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358027261] [2020-07-21 12:56:32,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:56:32,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:56:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:32,465 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 12:56:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:32,621 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 12:56:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:56:32,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 12:56:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:32,625 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:56:32,626 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 12:56:32,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:56:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 12:56:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 12:56:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 12:56:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 12:56:32,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 12:56:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:32,638 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 12:56:32,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:56:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 12:56:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 12:56:32,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:32,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:32,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 12:56:32,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:32,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790964640] [2020-07-21 12:56:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:32,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:56:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 12:56:32,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:33,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:33,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 12:56:33,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790964640] [2020-07-21 12:56:33,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:33,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 12:56:33,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016073878] [2020-07-21 12:56:33,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:56:33,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:56:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:33,290 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 12:56:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:33,447 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 12:56:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:56:33,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 12:56:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:33,451 INFO L225 Difference]: With dead ends: 47 [2020-07-21 12:56:33,452 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 12:56:33,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:56:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 12:56:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 12:56:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 12:56:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 12:56:33,463 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 12:56:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:33,464 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 12:56:33,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:56:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 12:56:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 12:56:33,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:33,467 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:33,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:33,674 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 12:56:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:33,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907675897] [2020-07-21 12:56:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:33,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:56:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 12:56:33,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:34,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 12:56:34,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907675897] [2020-07-21 12:56:34,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:34,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 12:56:34,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341872616] [2020-07-21 12:56:34,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:56:34,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:56:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:34,374 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 12:56:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:34,576 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 12:56:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:34,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 12:56:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:34,579 INFO L225 Difference]: With dead ends: 52 [2020-07-21 12:56:34,579 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 12:56:34,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 12:56:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 12:56:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 12:56:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 12:56:34,606 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 12:56:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:34,607 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 12:56:34,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:56:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 12:56:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 12:56:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:34,610 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:34,827 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 12:56:34,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:34,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213514443] [2020-07-21 12:56:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:34,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:56:34,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 12:56:34,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:35,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 12:56:35,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213514443] [2020-07-21 12:56:35,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:35,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 12:56:35,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346974993] [2020-07-21 12:56:35,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:56:35,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:56:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:35,539 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 12:56:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:35,757 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 12:56:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:35,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 12:56:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:35,761 INFO L225 Difference]: With dead ends: 57 [2020-07-21 12:56:35,762 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 12:56:35,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 12:56:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 12:56:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 12:56:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 12:56:35,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-21 12:56:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:35,776 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 12:56:35,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:56:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 12:56:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 12:56:35,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:35,780 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:35,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:35,995 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-21 12:56:35,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:35,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181428183] [2020-07-21 12:56:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:36,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 12:56:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-21 12:56:36,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:37,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-21 12:56:37,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181428183] [2020-07-21 12:56:37,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:37,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 12:56:37,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210371089] [2020-07-21 12:56:37,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:56:37,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:56:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:56:37,468 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 12:56:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:37,653 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 12:56:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:56:37,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-21 12:56:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:37,658 INFO L225 Difference]: With dead ends: 62 [2020-07-21 12:56:37,658 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 12:56:37,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:56:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 12:56:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 12:56:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 12:56:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 12:56:37,673 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-21 12:56:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:37,674 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 12:56:37,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:56:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 12:56:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 12:56:37,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:37,677 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:37,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:37,892 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-21 12:56:37,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:37,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606905336] [2020-07-21 12:56:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:37,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 12:56:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-21 12:56:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:38,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 12:56:39,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606905336] [2020-07-21 12:56:39,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:39,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 12:56:39,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216184860] [2020-07-21 12:56:39,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:56:39,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:56:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:56:39,015 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 12:56:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:39,237 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 12:56:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:56:39,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-21 12:56:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:39,242 INFO L225 Difference]: With dead ends: 67 [2020-07-21 12:56:39,242 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 12:56:39,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:56:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 12:56:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 12:56:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 12:56:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 12:56:39,255 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-21 12:56:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:39,256 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 12:56:39,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:56:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 12:56:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 12:56:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:39,261 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:39,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:39,474 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-21 12:56:39,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:39,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130332370] [2020-07-21 12:56:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:39,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:39,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:39,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 12:56:39,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:40,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:40,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 12:56:41,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130332370] [2020-07-21 12:56:41,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:41,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 12:56:41,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712766722] [2020-07-21 12:56:41,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:41,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:41,707 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 12:56:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:42,004 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 12:56:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:56:42,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 12:56:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:42,011 INFO L225 Difference]: With dead ends: 72 [2020-07-21 12:56:42,011 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 12:56:42,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 12:56:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 12:56:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 12:56:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 12:56:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 12:56:42,026 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 12:56:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:42,027 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 12:56:42,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 12:56:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-21 12:56:42,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:42,032 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:42,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:42,246 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash 659892537, now seen corresponding path program 5 times [2020-07-21 12:56:42,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:42,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017662114] [2020-07-21 12:56:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:42,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:42,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-21 12:56:42,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:43,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-21 12:56:44,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017662114] [2020-07-21 12:56:44,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:44,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 12:56:44,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354467379] [2020-07-21 12:56:44,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:44,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:44,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:44,503 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 12:56:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:44,770 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 12:56:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:56:44,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-21 12:56:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:44,775 INFO L225 Difference]: With dead ends: 77 [2020-07-21 12:56:44,775 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 12:56:44,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 12:56:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 12:56:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 12:56:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 12:56:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 12:56:44,789 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-21 12:56:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:44,790 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 12:56:44,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 12:56:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-21 12:56:44,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:44,798 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:45,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:45,013 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2120427989, now seen corresponding path program 6 times [2020-07-21 12:56:45,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:45,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012048173] [2020-07-21 12:56:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:45,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 12:56:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8874 backedges. 248 proven. 1621 refuted. 0 times theorem prover too weak. 7005 trivial. 0 not checked. [2020-07-21 12:56:45,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:47,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:47,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:47,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:47,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:47,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:48,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:48,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:48,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8874 backedges. 248 proven. 1672 refuted. 0 times theorem prover too weak. 6954 trivial. 0 not checked. [2020-07-21 12:56:48,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012048173] [2020-07-21 12:56:48,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:48,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 12:56:48,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108831256] [2020-07-21 12:56:48,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:56:48,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:48,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:56:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:48,333 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 12:56:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:48,623 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 12:56:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:56:48,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 390 [2020-07-21 12:56:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:48,636 INFO L225 Difference]: With dead ends: 82 [2020-07-21 12:56:48,636 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 12:56:48,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 749 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 12:56:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 12:56:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 12:56:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 12:56:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 12:56:48,651 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 390 [2020-07-21 12:56:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:48,652 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 12:56:48,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:56:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 12:56:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2020-07-21 12:56:48,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:48,658 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 76, 44, 44, 44, 44, 44, 44, 44, 32, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:48,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:48,871 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -694257440, now seen corresponding path program 6 times [2020-07-21 12:56:48,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:48,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122380956] [2020-07-21 12:56:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:49,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:49,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 12:56:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2713 refuted. 0 times theorem prover too weak. 19094 trivial. 0 not checked. [2020-07-21 12:56:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:51,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:51,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2770 refuted. 0 times theorem prover too weak. 19037 trivial. 0 not checked. [2020-07-21 12:56:53,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122380956] [2020-07-21 12:56:53,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:53,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 12:56:53,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871299721] [2020-07-21 12:56:53,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:56:53,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:56:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 12:56:53,263 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 12:56:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:53,715 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 12:56:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:56:53,716 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 617 [2020-07-21 12:56:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:53,722 INFO L225 Difference]: With dead ends: 87 [2020-07-21 12:56:53,722 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 12:56:53,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1202 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 12:56:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 12:56:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 12:56:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 12:56:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 12:56:53,768 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 617 [2020-07-21 12:56:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:53,772 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 12:56:53,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:56:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 12:56:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2020-07-21 12:56:53,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:53,788 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 91, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:54,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:54,002 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1630389726, now seen corresponding path program 7 times [2020-07-21 12:56:54,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:54,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817665432] [2020-07-21 12:56:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:54,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:56:54,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6068 refuted. 0 times theorem prover too weak. 78009 trivial. 0 not checked. [2020-07-21 12:56:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:59,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:00,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:01,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:02,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:02,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:02,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:02,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:02,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6138 refuted. 0 times theorem prover too weak. 77939 trivial. 0 not checked. [2020-07-21 12:57:03,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817665432] [2020-07-21 12:57:03,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:03,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 12:57:03,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18844792] [2020-07-21 12:57:03,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 12:57:03,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 12:57:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 12:57:03,083 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 12:57:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:03,677 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 12:57:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:57:03,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1183 [2020-07-21 12:57:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:03,685 INFO L225 Difference]: With dead ends: 92 [2020-07-21 12:57:03,685 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 12:57:03,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2331 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 12:57:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 12:57:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 12:57:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 12:57:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 12:57:03,699 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1183 [2020-07-21 12:57:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:03,701 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 12:57:03,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 12:57:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 12:57:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2020-07-21 12:57:03,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:03,714 INFO L422 BasicCegarLoop]: trace histogram [155, 155, 128, 77, 77, 77, 77, 77, 77, 77, 51, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:03,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:03,927 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1871885629, now seen corresponding path program 7 times [2020-07-21 12:57:03,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:03,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040080262] [2020-07-21 12:57:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:04,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2365 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:57:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 67572 backedges. 931 proven. 5636 refuted. 0 times theorem prover too weak. 61005 trivial. 0 not checked. [2020-07-21 12:57:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:08,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:08,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:09,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:09,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:10,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:10,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:10,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:10,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:11,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:11,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:11,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:11,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 67572 backedges. 931 proven. 5713 refuted. 0 times theorem prover too weak. 60928 trivial. 0 not checked. [2020-07-21 12:57:11,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040080262] [2020-07-21 12:57:11,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:11,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 12:57:11,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535169118] [2020-07-21 12:57:11,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:57:11,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:57:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:57:11,696 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-21 12:57:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:12,059 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 12:57:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:57:12,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1065 [2020-07-21 12:57:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:12,065 INFO L225 Difference]: With dead ends: 97 [2020-07-21 12:57:12,065 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 12:57:12,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2137 GetRequests, 2094 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:57:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 12:57:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 12:57:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 12:57:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 12:57:12,083 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1065 [2020-07-21 12:57:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:12,084 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 12:57:12,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:57:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 12:57:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2020-07-21 12:57:12,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:12,100 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 98, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:12,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:12,314 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -638809117, now seen corresponding path program 8 times [2020-07-21 12:57:12,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:12,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223662615] [2020-07-21 12:57:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:12,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:57:12,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1014 proven. 7724 refuted. 0 times theorem prover too weak. 90202 trivial. 0 not checked. [2020-07-21 12:57:13,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:18,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:20,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:20,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:21,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:21,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:21,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:22,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:22,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:22,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:22,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:22,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1014 proven. 7816 refuted. 0 times theorem prover too weak. 90110 trivial. 0 not checked. [2020-07-21 12:57:23,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223662615] [2020-07-21 12:57:23,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:23,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 12:57:23,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232547529] [2020-07-21 12:57:23,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:57:23,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:23,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:57:23,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:57:23,240 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-21 12:57:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:24,090 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 12:57:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:57:24,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1274 [2020-07-21 12:57:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:24,095 INFO L225 Difference]: With dead ends: 102 [2020-07-21 12:57:24,096 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 12:57:24,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2557 GetRequests, 2509 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 12:57:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 12:57:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 12:57:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 12:57:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 12:57:24,116 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1274 [2020-07-21 12:57:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:24,117 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 12:57:24,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:57:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 12:57:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-07-21 12:57:24,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:24,147 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 211, 122, 122, 122, 122, 122, 122, 122, 89, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:24,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:24,360 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1963331046, now seen corresponding path program 8 times [2020-07-21 12:57:24,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:24,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98959482] [2020-07-21 12:57:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:25,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:25,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:25,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 3746 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:57:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 171239 backedges. 1790 proven. 10664 refuted. 0 times theorem prover too weak. 158785 trivial. 0 not checked. [2020-07-21 12:57:26,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:31,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:31,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:34,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:34,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 171239 backedges. 1800 proven. 10746 refuted. 0 times theorem prover too weak. 158693 trivial. 0 not checked. [2020-07-21 12:57:38,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98959482] [2020-07-21 12:57:38,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:38,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 12:57:38,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949292259] [2020-07-21 12:57:38,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:57:38,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:57:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:57:38,428 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 12:57:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:38,951 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-21 12:57:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:57:38,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1688 [2020-07-21 12:57:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:38,958 INFO L225 Difference]: With dead ends: 245 [2020-07-21 12:57:38,958 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 12:57:38,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3384 GetRequests, 3336 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 12:57:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 12:57:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 12:57:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 12:57:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-21 12:57:38,987 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1688 [2020-07-21 12:57:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:38,988 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-21 12:57:38,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:57:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-21 12:57:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 12:57:38,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:38,998 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:39,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:39,212 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 9 times [2020-07-21 12:57:39,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:39,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802662111] [2020-07-21 12:57:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:39,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:57:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4349 refuted. 0 times theorem prover too weak. 35140 trivial. 0 not checked. [2020-07-21 12:57:40,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:44,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:45,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:46,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:46,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:47,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-21 12:57:48,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802662111] [2020-07-21 12:57:48,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:48,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 12:57:48,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312075521] [2020-07-21 12:57:48,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:57:48,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:57:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:57:48,208 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-21 12:57:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:48,688 INFO L93 Difference]: Finished difference Result 135 states and 195 transitions. [2020-07-21 12:57:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:57:48,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-21 12:57:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:48,693 INFO L225 Difference]: With dead ends: 135 [2020-07-21 12:57:48,694 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 12:57:48,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 12:57:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 12:57:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-21 12:57:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 12:57:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2020-07-21 12:57:48,710 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 830 [2020-07-21 12:57:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:48,711 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2020-07-21 12:57:48,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:57:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2020-07-21 12:57:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 12:57:48,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:48,720 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:48,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:48,933 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 10 times [2020-07-21 12:57:48,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:48,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481414297] [2020-07-21 12:57:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:49,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 12:57:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 12:57:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 12:58:03,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481414297] [2020-07-21 12:58:03,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:03,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 12:58:03,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12595198] [2020-07-21 12:58:03,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 12:58:03,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 12:58:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 12:58:03,401 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 36 states. [2020-07-21 12:58:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:04,473 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2020-07-21 12:58:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 12:58:04,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 12:58:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:04,482 INFO L225 Difference]: With dead ends: 194 [2020-07-21 12:58:04,482 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 12:58:04,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1455 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 12:58:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 12:58:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 147. [2020-07-21 12:58:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 12:58:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 255 transitions. [2020-07-21 12:58:04,520 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 255 transitions. Word has length 749 [2020-07-21 12:58:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:04,521 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 255 transitions. [2020-07-21 12:58:04,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 12:58:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 255 transitions. [2020-07-21 12:58:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2020-07-21 12:58:04,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:04,537 INFO L422 BasicCegarLoop]: trace histogram [123, 123, 93, 61, 61, 61, 61, 61, 61, 61, 32, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:04,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:04,751 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:04,751 INFO L82 PathProgramCache]: Analyzing trace with hash 593699595, now seen corresponding path program 11 times [2020-07-21 12:58:04,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:04,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588203832] [2020-07-21 12:58:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:05,296 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:05,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:58:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41610 backedges. 1098 proven. 4588 refuted. 0 times theorem prover too weak. 35924 trivial. 0 not checked. [2020-07-21 12:58:05,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:09,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:11,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:12,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:12,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:12,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:12,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 41610 backedges. 1106 proven. 4680 refuted. 0 times theorem prover too weak. 35824 trivial. 0 not checked. [2020-07-21 12:58:13,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588203832] [2020-07-21 12:58:13,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:13,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 12:58:13,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534912789] [2020-07-21 12:58:13,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:58:13,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:58:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:58:13,882 INFO L87 Difference]: Start difference. First operand 147 states and 255 transitions. Second operand 22 states. [2020-07-21 12:58:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:14,399 INFO L93 Difference]: Finished difference Result 197 states and 341 transitions. [2020-07-21 12:58:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:58:14,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 838 [2020-07-21 12:58:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:14,407 INFO L225 Difference]: With dead ends: 197 [2020-07-21 12:58:14,407 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 12:58:14,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1684 GetRequests, 1636 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 12:58:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 12:58:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2020-07-21 12:58:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 12:58:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-21 12:58:14,440 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 838 [2020-07-21 12:58:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:14,441 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-21 12:58:14,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:58:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-21 12:58:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 12:58:14,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:14,455 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:14,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:14,669 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1679468380, now seen corresponding path program 12 times [2020-07-21 12:58:14,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:14,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910571544] [2020-07-21 12:58:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:15,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:58:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1025 proven. 4305 refuted. 0 times theorem prover too weak. 37062 trivial. 0 not checked. [2020-07-21 12:58:15,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:19,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:19,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:20,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:20,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:21,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:21,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:22,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:22,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:22,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:23,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:23,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1028 proven. 4372 refuted. 0 times theorem prover too weak. 36992 trivial. 0 not checked. [2020-07-21 12:58:23,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910571544] [2020-07-21 12:58:23,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:23,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 12:58:23,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506862354] [2020-07-21 12:58:23,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:58:23,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:58:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:58:23,481 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 22 states. [2020-07-21 12:58:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:24,051 INFO L93 Difference]: Finished difference Result 292 states and 547 transitions. [2020-07-21 12:58:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:58:24,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 845 [2020-07-21 12:58:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:24,060 INFO L225 Difference]: With dead ends: 292 [2020-07-21 12:58:24,060 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 12:58:24,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1652 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:58:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 12:58:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-07-21 12:58:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 12:58:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 207 transitions. [2020-07-21 12:58:24,096 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 207 transitions. Word has length 845 [2020-07-21 12:58:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:24,097 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 207 transitions. [2020-07-21 12:58:24,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:58:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 207 transitions. [2020-07-21 12:58:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 12:58:24,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:24,111 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:24,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:24,325 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1934761414, now seen corresponding path program 13 times [2020-07-21 12:58:24,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:24,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262765073] [2020-07-21 12:58:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:24,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:24,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 12:58:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1757 proven. 1940 refuted. 0 times theorem prover too weak. 31603 trivial. 0 not checked. [2020-07-21 12:58:25,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:27,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:27,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:28,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:28,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:28,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:28,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:28,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:29,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:29,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:29,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:29,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1762 proven. 1976 refuted. 0 times theorem prover too weak. 31562 trivial. 0 not checked. [2020-07-21 12:58:30,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262765073] [2020-07-21 12:58:30,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:30,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 12:58:30,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321314159] [2020-07-21 12:58:30,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 12:58:30,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 12:58:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 12:58:30,355 INFO L87 Difference]: Start difference. First operand 131 states and 207 transitions. Second operand 18 states. [2020-07-21 12:58:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:30,631 INFO L93 Difference]: Finished difference Result 176 states and 281 transitions. [2020-07-21 12:58:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:58:30,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 773 [2020-07-21 12:58:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:30,637 INFO L225 Difference]: With dead ends: 176 [2020-07-21 12:58:30,638 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 12:58:30,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1516 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 12:58:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 12:58:30,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-07-21 12:58:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 12:58:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 224 transitions. [2020-07-21 12:58:30,669 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 224 transitions. Word has length 773 [2020-07-21 12:58:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:30,669 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 224 transitions. [2020-07-21 12:58:30,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 12:58:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 224 transitions. [2020-07-21 12:58:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 12:58:30,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:30,689 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:30,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:30,903 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1485076642, now seen corresponding path program 14 times [2020-07-21 12:58:30,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:30,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450953983] [2020-07-21 12:58:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:31,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:31,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:58:31,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1019 proven. 3681 refuted. 0 times theorem prover too weak. 37692 trivial. 0 not checked. [2020-07-21 12:58:31,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:35,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:36,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:37,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:38,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:38,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1029 proven. 3724 refuted. 0 times theorem prover too weak. 37639 trivial. 0 not checked. [2020-07-21 12:58:38,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450953983] [2020-07-21 12:58:38,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:38,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 12:58:38,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532473281] [2020-07-21 12:58:38,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:58:38,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:38,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:58:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:58:38,454 INFO L87 Difference]: Start difference. First operand 142 states and 224 transitions. Second operand 20 states. [2020-07-21 12:58:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:38,811 INFO L93 Difference]: Finished difference Result 183 states and 294 transitions. [2020-07-21 12:58:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:58:38,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 845 [2020-07-21 12:58:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:38,817 INFO L225 Difference]: With dead ends: 183 [2020-07-21 12:58:38,818 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 12:58:38,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1696 GetRequests, 1656 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:58:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 12:58:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2020-07-21 12:58:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 12:58:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 210 transitions. [2020-07-21 12:58:38,846 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 210 transitions. Word has length 845 [2020-07-21 12:58:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:38,847 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 210 transitions. [2020-07-21 12:58:38,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:58:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 210 transitions. [2020-07-21 12:58:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2020-07-21 12:58:38,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:38,859 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 90, 56, 56, 56, 56, 56, 56, 56, 34, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:39,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:39,073 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 729478484, now seen corresponding path program 15 times [2020-07-21 12:58:39,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:39,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783064570] [2020-07-21 12:58:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:39,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:39,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:58:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 1478 proven. 3187 refuted. 0 times theorem prover too weak. 30812 trivial. 0 not checked. [2020-07-21 12:58:39,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:43,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:44,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:44,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:45,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:45,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:45,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:45,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:46,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:46,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:46,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:46,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 1492 proven. 3252 refuted. 0 times theorem prover too weak. 30733 trivial. 0 not checked. [2020-07-21 12:58:46,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783064570] [2020-07-21 12:58:46,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:46,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 12:58:46,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689717311] [2020-07-21 12:58:46,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:58:46,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:46,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:58:46,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:58:46,845 INFO L87 Difference]: Start difference. First operand 134 states and 210 transitions. Second operand 20 states. [2020-07-21 12:58:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:47,205 INFO L93 Difference]: Finished difference Result 193 states and 303 transitions. [2020-07-21 12:58:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:58:47,207 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 775 [2020-07-21 12:58:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:47,212 INFO L225 Difference]: With dead ends: 193 [2020-07-21 12:58:47,212 INFO L226 Difference]: Without dead ends: 176 [2020-07-21 12:58:47,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1514 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:58:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-21 12:58:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2020-07-21 12:58:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 12:58:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 242 transitions. [2020-07-21 12:58:47,242 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 242 transitions. Word has length 775 [2020-07-21 12:58:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:47,243 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 242 transitions. [2020-07-21 12:58:47,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:58:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 242 transitions. [2020-07-21 12:58:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-21 12:58:47,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:47,257 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:47,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:47,470 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash -777297163, now seen corresponding path program 16 times [2020-07-21 12:58:47,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002126927] [2020-07-21 12:58:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:48,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:58:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1090 proven. 3260 refuted. 0 times theorem prover too weak. 32082 trivial. 0 not checked. [2020-07-21 12:58:48,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:50,605 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 12:58:52,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:53,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:54,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:54,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:54,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:54,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:54,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:55,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:55,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:55,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1098 proven. 3305 refuted. 0 times theorem prover too weak. 32029 trivial. 0 not checked. [2020-07-21 12:58:55,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002126927] [2020-07-21 12:58:55,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:55,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 12:58:55,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086210661] [2020-07-21 12:58:55,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:58:55,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:58:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:58:55,594 INFO L87 Difference]: Start difference. First operand 152 states and 242 transitions. Second operand 20 states. [2020-07-21 12:58:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:55,958 INFO L93 Difference]: Finished difference Result 219 states and 346 transitions. [2020-07-21 12:58:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:58:55,960 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 785 [2020-07-21 12:58:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:55,965 INFO L225 Difference]: With dead ends: 219 [2020-07-21 12:58:55,966 INFO L226 Difference]: Without dead ends: 197 [2020-07-21 12:58:55,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1536 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:58:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-21 12:58:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2020-07-21 12:58:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 12:58:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 239 transitions. [2020-07-21 12:58:55,997 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 239 transitions. Word has length 785 [2020-07-21 12:58:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:55,997 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 239 transitions. [2020-07-21 12:58:55,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:58:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 239 transitions. [2020-07-21 12:58:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 12:58:56,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:56,012 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:56,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:56,227 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1822250204, now seen corresponding path program 17 times [2020-07-21 12:58:56,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:56,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786489988] [2020-07-21 12:58:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:56,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:58:56,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1076 proven. 4254 refuted. 0 times theorem prover too weak. 37062 trivial. 0 not checked. [2020-07-21 12:58:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:57,820 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 12:59:01,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:01,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:03,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:04,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:04,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:04,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:05,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:05,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:05,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:05,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1077 proven. 4323 refuted. 0 times theorem prover too weak. 36992 trivial. 0 not checked. [2020-07-21 12:59:05,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786489988] [2020-07-21 12:59:05,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:05,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 12:59:05,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105429289] [2020-07-21 12:59:05,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:59:05,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:59:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:59:05,953 INFO L87 Difference]: Start difference. First operand 149 states and 239 transitions. Second operand 22 states. [2020-07-21 12:59:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:06,458 INFO L93 Difference]: Finished difference Result 188 states and 294 transitions. [2020-07-21 12:59:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:59:06,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 845 [2020-07-21 12:59:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:06,465 INFO L225 Difference]: With dead ends: 188 [2020-07-21 12:59:06,466 INFO L226 Difference]: Without dead ends: 158 [2020-07-21 12:59:06,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1652 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 12:59:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-21 12:59:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2020-07-21 12:59:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 12:59:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-21 12:59:06,511 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 845 [2020-07-21 12:59:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:06,511 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-21 12:59:06,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:59:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-21 12:59:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2020-07-21 12:59:06,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:06,529 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 89, 57, 57, 57, 57, 57, 57, 57, 32, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:06,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:06,744 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1980930225, now seen corresponding path program 18 times [2020-07-21 12:59:06,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:06,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115751031] [2020-07-21 12:59:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:07,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:59:07,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 2112 proven. 2621 refuted. 0 times theorem prover too weak. 31787 trivial. 0 not checked. [2020-07-21 12:59:07,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:11,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:11,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:13,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:13,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:13,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:13,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 2124 proven. 2688 refuted. 0 times theorem prover too weak. 31708 trivial. 0 not checked. [2020-07-21 12:59:15,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115751031] [2020-07-21 12:59:15,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:15,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 12:59:15,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986237963] [2020-07-21 12:59:15,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:59:15,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:59:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:59:15,472 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 20 states. [2020-07-21 12:59:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:16,031 INFO L93 Difference]: Finished difference Result 208 states and 325 transitions. [2020-07-21 12:59:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:16,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 786 [2020-07-21 12:59:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:16,040 INFO L225 Difference]: With dead ends: 208 [2020-07-21 12:59:16,040 INFO L226 Difference]: Without dead ends: 196 [2020-07-21 12:59:16,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1579 GetRequests, 1536 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:59:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-21 12:59:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 154. [2020-07-21 12:59:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 12:59:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 243 transitions. [2020-07-21 12:59:16,072 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 243 transitions. Word has length 786 [2020-07-21 12:59:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:16,073 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 243 transitions. [2020-07-21 12:59:16,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:59:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 243 transitions. [2020-07-21 12:59:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 12:59:16,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:16,087 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:16,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:16,301 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash 855949909, now seen corresponding path program 19 times [2020-07-21 12:59:16,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:16,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935351230] [2020-07-21 12:59:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:17,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:17,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:59:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3277 proven. 933 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 12:59:17,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:20,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:20,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:20,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:21,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:21,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:21,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:21,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:21,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:22,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:22,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3273 proven. 990 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 12:59:24,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935351230] [2020-07-21 12:59:24,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:24,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 12:59:24,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406847497] [2020-07-21 12:59:24,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:59:24,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:59:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:59:24,328 INFO L87 Difference]: Start difference. First operand 154 states and 243 transitions. Second operand 20 states. [2020-07-21 12:59:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:24,838 INFO L93 Difference]: Finished difference Result 205 states and 311 transitions. [2020-07-21 12:59:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:24,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 12:59:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:24,847 INFO L225 Difference]: With dead ends: 205 [2020-07-21 12:59:24,848 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 12:59:24,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:59:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 12:59:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2020-07-21 12:59:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-07-21 12:59:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 258 transitions. [2020-07-21 12:59:24,896 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 258 transitions. Word has length 761 [2020-07-21 12:59:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:24,897 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 258 transitions. [2020-07-21 12:59:24,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:59:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 258 transitions. [2020-07-21 12:59:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 12:59:24,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:24,920 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:25,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:25,135 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1892267012, now seen corresponding path program 20 times [2020-07-21 12:59:25,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:25,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355133637] [2020-07-21 12:59:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:25,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:59:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1926 proven. 2354 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-21 12:59:26,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:30,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:30,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:30,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:30,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 2403 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-21 12:59:33,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355133637] [2020-07-21 12:59:33,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:33,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 12:59:33,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170027327] [2020-07-21 12:59:33,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:59:33,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:59:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:59:33,438 INFO L87 Difference]: Start difference. First operand 165 states and 258 transitions. Second operand 20 states. [2020-07-21 12:59:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:33,865 INFO L93 Difference]: Finished difference Result 289 states and 458 transitions. [2020-07-21 12:59:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:33,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-21 12:59:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:33,876 INFO L225 Difference]: With dead ends: 289 [2020-07-21 12:59:33,877 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 12:59:33,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:59:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 12:59:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 196. [2020-07-21 12:59:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-21 12:59:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 315 transitions. [2020-07-21 12:59:33,936 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 315 transitions. Word has length 773 [2020-07-21 12:59:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:33,937 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 315 transitions. [2020-07-21 12:59:33,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:59:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 315 transitions. [2020-07-21 12:59:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-21 12:59:33,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:33,962 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:34,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:34,176 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1710613515, now seen corresponding path program 21 times [2020-07-21 12:59:34,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:34,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138615165] [2020-07-21 12:59:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:34,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:34,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:59:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1434 proven. 2916 refuted. 0 times theorem prover too weak. 32082 trivial. 0 not checked. [2020-07-21 12:59:35,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:39,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:40,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:41,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:42,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1440 proven. 2963 refuted. 0 times theorem prover too weak. 32029 trivial. 0 not checked. [2020-07-21 12:59:42,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138615165] [2020-07-21 12:59:42,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:42,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 12:59:42,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942051878] [2020-07-21 12:59:42,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:59:42,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:59:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:59:42,758 INFO L87 Difference]: Start difference. First operand 196 states and 315 transitions. Second operand 20 states. [2020-07-21 12:59:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:43,226 INFO L93 Difference]: Finished difference Result 268 states and 426 transitions. [2020-07-21 12:59:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:43,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 785 [2020-07-21 12:59:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:43,238 INFO L225 Difference]: With dead ends: 268 [2020-07-21 12:59:43,239 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 12:59:43,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1536 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:59:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 12:59:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 183. [2020-07-21 12:59:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 12:59:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 287 transitions. [2020-07-21 12:59:43,291 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 287 transitions. Word has length 785 [2020-07-21 12:59:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:43,291 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 287 transitions. [2020-07-21 12:59:43,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:59:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 287 transitions. [2020-07-21 12:59:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2020-07-21 12:59:43,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:43,310 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 89, 57, 57, 57, 57, 57, 57, 57, 32, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:43,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:43,525 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 607100133, now seen corresponding path program 22 times [2020-07-21 12:59:43,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:43,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246518729] [2020-07-21 12:59:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:44,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:59:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 3401 proven. 1332 refuted. 0 times theorem prover too weak. 31787 trivial. 0 not checked. [2020-07-21 12:59:45,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:48,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:48,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:49,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:49,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:50,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:51,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 3411 proven. 1401 refuted. 0 times theorem prover too weak. 31708 trivial. 0 not checked. [2020-07-21 12:59:53,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246518729] [2020-07-21 12:59:53,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:53,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 12:59:53,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536545836] [2020-07-21 12:59:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 12:59:53,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 12:59:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:59:53,153 INFO L87 Difference]: Start difference. First operand 183 states and 287 transitions. Second operand 20 states. [2020-07-21 12:59:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:53,660 INFO L93 Difference]: Finished difference Result 289 states and 449 transitions. [2020-07-21 12:59:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:59:53,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 786 [2020-07-21 12:59:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:53,672 INFO L225 Difference]: With dead ends: 289 [2020-07-21 12:59:53,672 INFO L226 Difference]: Without dead ends: 282 [2020-07-21 12:59:53,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1579 GetRequests, 1536 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 12:59:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-21 12:59:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 198. [2020-07-21 12:59:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 12:59:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 313 transitions. [2020-07-21 12:59:53,718 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 313 transitions. Word has length 786 [2020-07-21 12:59:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:53,719 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 313 transitions. [2020-07-21 12:59:53,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 12:59:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 313 transitions. [2020-07-21 12:59:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-21 12:59:53,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:53,738 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 88, 58, 58, 58, 58, 58, 58, 58, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:59:53,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:53,952 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1769823270, now seen corresponding path program 23 times [2020-07-21 12:59:53,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:53,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524626350] [2020-07-21 12:59:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:54,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:59:54,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1599 proven. 3411 refuted. 0 times theorem prover too weak. 32574 trivial. 0 not checked. [2020-07-21 12:59:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:00,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:01,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:01,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:02,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:02,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:03,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:03,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:03,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:03,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:03,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1596 proven. 3484 refuted. 0 times theorem prover too weak. 32504 trivial. 0 not checked. [2020-07-21 13:00:04,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524626350] [2020-07-21 13:00:04,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:04,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 13:00:04,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127883849] [2020-07-21 13:00:04,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:00:04,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:04,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:00:04,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:00:04,683 INFO L87 Difference]: Start difference. First operand 198 states and 313 transitions. Second operand 22 states. [2020-07-21 13:00:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:05,303 INFO L93 Difference]: Finished difference Result 319 states and 496 transitions. [2020-07-21 13:00:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:00:05,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 797 [2020-07-21 13:00:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:05,312 INFO L225 Difference]: With dead ends: 319 [2020-07-21 13:00:05,313 INFO L226 Difference]: Without dead ends: 289 [2020-07-21 13:00:05,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1556 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:00:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-07-21 13:00:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 203. [2020-07-21 13:00:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 13:00:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 320 transitions. [2020-07-21 13:00:05,356 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 320 transitions. Word has length 797 [2020-07-21 13:00:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:05,356 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 320 transitions. [2020-07-21 13:00:05,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:00:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 320 transitions. [2020-07-21 13:00:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 13:00:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:05,373 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:05,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:05,587 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1850102596, now seen corresponding path program 24 times [2020-07-21 13:00:05,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:05,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153417801] [2020-07-21 13:00:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:06,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:06,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:00:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1177 proven. 3673 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-21 13:00:06,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:11,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:13,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:13,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:14,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:14,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:14,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:14,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:15,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:15,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:15,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:15,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1176 proven. 3744 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-21 13:00:16,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153417801] [2020-07-21 13:00:16,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:16,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 13:00:16,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111281832] [2020-07-21 13:00:16,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:00:16,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:00:16,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:00:16,355 INFO L87 Difference]: Start difference. First operand 203 states and 320 transitions. Second operand 22 states. [2020-07-21 13:00:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:16,829 INFO L93 Difference]: Finished difference Result 261 states and 395 transitions. [2020-07-21 13:00:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:00:16,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-21 13:00:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:16,837 INFO L225 Difference]: With dead ends: 261 [2020-07-21 13:00:16,837 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 13:00:16,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:00:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 13:00:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2020-07-21 13:00:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 13:00:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-07-21 13:00:16,873 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 773 [2020-07-21 13:00:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:16,874 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-07-21 13:00:16,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:00:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-07-21 13:00:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 13:00:16,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:16,888 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:17,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:17,103 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1953028691, now seen corresponding path program 25 times [2020-07-21 13:00:17,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:17,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957638723] [2020-07-21 13:00:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:17,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:17,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:00:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2164 proven. 2606 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 13:00:18,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:23,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:23,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:24,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:24,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:25,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:26,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:26,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:26,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2159 proven. 2681 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 13:00:27,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957638723] [2020-07-21 13:00:27,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:27,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 13:00:27,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412759274] [2020-07-21 13:00:27,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:00:27,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:00:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:00:27,815 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 22 states. [2020-07-21 13:00:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:28,465 INFO L93 Difference]: Finished difference Result 388 states and 600 transitions. [2020-07-21 13:00:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:00:28,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 13:00:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:28,479 INFO L225 Difference]: With dead ends: 388 [2020-07-21 13:00:28,479 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 13:00:28,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:00:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 13:00:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 156. [2020-07-21 13:00:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 13:00:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2020-07-21 13:00:28,528 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 761 [2020-07-21 13:00:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:28,528 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2020-07-21 13:00:28,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:00:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2020-07-21 13:00:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 13:00:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:28,540 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:28,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:28,754 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 26 times [2020-07-21 13:00:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161086261] [2020-07-21 13:00:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:29,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:00:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 13:00:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:32,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:34,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:34,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 13:00:38,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161086261] [2020-07-21 13:00:38,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:38,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 13:00:38,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546267267] [2020-07-21 13:00:38,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 13:00:38,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 13:00:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:00:38,120 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand 20 states. [2020-07-21 13:00:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:38,605 INFO L93 Difference]: Finished difference Result 302 states and 461 transitions. [2020-07-21 13:00:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:00:38,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 13:00:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:38,614 INFO L225 Difference]: With dead ends: 302 [2020-07-21 13:00:38,615 INFO L226 Difference]: Without dead ends: 295 [2020-07-21 13:00:38,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:00:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-21 13:00:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2020-07-21 13:00:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 13:00:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-21 13:00:38,658 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 761 [2020-07-21 13:00:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:38,659 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-21 13:00:38,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 13:00:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-21 13:00:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 13:00:38,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:38,670 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:38,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:38,884 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 27 times [2020-07-21 13:00:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:38,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968185538] [2020-07-21 13:00:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:39,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:00:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 13:00:40,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:43,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:43,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:45,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:45,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:46,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:46,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:47,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:47,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:47,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:47,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:49,790 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 13:00:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 13:00:50,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968185538] [2020-07-21 13:00:50,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:50,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 13:00:50,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878654123] [2020-07-21 13:00:50,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:00:50,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:00:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:00:50,333 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-21 13:00:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:51,001 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-21 13:00:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:00:51,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 13:00:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:51,015 INFO L225 Difference]: With dead ends: 433 [2020-07-21 13:00:51,015 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 13:00:51,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:00:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 13:00:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-21 13:00:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 13:00:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-21 13:00:51,050 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-21 13:00:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:51,051 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-21 13:00:51,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:00:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-21 13:00:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 13:00:51,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:51,059 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:51,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:51,273 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 28 times [2020-07-21 13:00:51,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:51,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224762377] [2020-07-21 13:00:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:52,208 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:52,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:00:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4243 refuted. 0 times theorem prover too weak. 28136 trivial. 0 not checked. [2020-07-21 13:00:52,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:58,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:59,798 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 13:01:00,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:02,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:02,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:03,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-21 13:01:04,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224762377] [2020-07-21 13:01:04,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:01:04,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 13:01:04,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249090668] [2020-07-21 13:01:04,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:01:04,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:01:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:01:04,216 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-21 13:01:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:04,956 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-21 13:01:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:01:04,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-21 13:01:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:04,964 INFO L225 Difference]: With dead ends: 271 [2020-07-21 13:01:04,964 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 13:01:04,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 13:01:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 13:01:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 13:01:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 13:01:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 13:01:04,984 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-21 13:01:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:04,985 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 13:01:04,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:01:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 13:01:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 13:01:04,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:01:04,992 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:01:05,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:05,200 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:01:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:01:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 29 times [2020-07-21 13:01:05,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:01:05,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839243480] [2020-07-21 13:01:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:06,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:01:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:01:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 13:01:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 13:01:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:10,303 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 13:01:12,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:14,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:14,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:15,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:15,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:16,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:17,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:17,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:17,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:17,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 13:01:17,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839243480] [2020-07-21 13:01:17,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:01:17,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 13:01:17,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452580698] [2020-07-21 13:01:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 13:01:17,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 13:01:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 13:01:17,796 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-21 13:01:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:18,321 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-21 13:01:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:01:18,323 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 13:01:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:18,326 INFO L225 Difference]: With dead ends: 135 [2020-07-21 13:01:18,326 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 13:01:18,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 13:01:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 13:01:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-21 13:01:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 13:01:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-21 13:01:18,341 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-21 13:01:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:18,342 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-21 13:01:18,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 13:01:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-21 13:01:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 13:01:18,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:01:18,351 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:01:18,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:18,557 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:01:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:01:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 30 times [2020-07-21 13:01:18,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:01:18,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198457370] [2020-07-21 13:01:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:19,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:01:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:01:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 13:01:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:01:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-21 13:01:20,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:01:20,753 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 13:01:22,665 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-07-21 13:01:26,563 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-07-21 13:01:26,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:29,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:31,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:32,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:32,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:32,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-21 13:01:33,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198457370] [2020-07-21 13:01:33,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:01:33,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 13:01:33,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723710965] [2020-07-21 13:01:33,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 13:01:33,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:33,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 13:01:33,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 13:01:33,825 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-21 13:01:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:01:34,663 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-21 13:01:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:01:34,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-21 13:01:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:01:34,667 INFO L225 Difference]: With dead ends: 219 [2020-07-21 13:01:34,667 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:01:34,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 13:01:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:01:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:01:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:01:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:01:34,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-21 13:01:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:01:34,676 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:01:34,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 13:01:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:01:34,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:01:34,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:01:34,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:01:37,486 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 370 DAG size of output: 111 [2020-07-21 13:01:46,181 WARN L193 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 730 DAG size of output: 288 [2020-07-21 13:01:54,454 WARN L193 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:02:00,441 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 668 DAG size of output: 262 [2020-07-21 13:02:00,850 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 76 [2020-07-21 13:02:10,196 WARN L193 SmtUtils]: Spent 9.34 s on a formula simplification. DAG size of input: 716 DAG size of output: 290 [2020-07-21 13:02:10,358 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:02:18,709 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:02:19,221 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:02:25,079 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 668 DAG size of output: 262 [2020-07-21 13:02:25,433 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 76 [2020-07-21 13:02:33,372 WARN L193 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:02:33,532 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:02:34,609 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 411 DAG size of output: 126 [2020-07-21 13:02:42,960 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 716 DAG size of output: 290 [2020-07-21 13:02:51,209 WARN L193 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:02:59,097 WARN L193 SmtUtils]: Spent 7.88 s on a formula simplification. DAG size of input: 736 DAG size of output: 289 [2020-07-21 13:02:59,651 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:03:00,331 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 111 [2020-07-21 13:03:01,373 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 411 DAG size of output: 126 [2020-07-21 13:03:09,425 WARN L193 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 730 DAG size of output: 288 [2020-07-21 13:03:17,520 WARN L193 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:03:25,564 WARN L193 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 736 DAG size of output: 289 [2020-07-21 13:03:26,079 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:03:34,144 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:03:40,068 WARN L193 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 668 DAG size of output: 262 [2020-07-21 13:03:47,965 WARN L193 SmtUtils]: Spent 7.89 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:03:48,490 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:03:56,348 WARN L193 SmtUtils]: Spent 7.86 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:03:56,504 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:03:57,033 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:03:58,069 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 411 DAG size of output: 126 [2020-07-21 13:04:06,186 WARN L193 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:04:14,168 WARN L193 SmtUtils]: Spent 7.98 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:04:22,160 WARN L193 SmtUtils]: Spent 7.99 s on a formula simplification. DAG size of input: 730 DAG size of output: 288 [2020-07-21 13:04:22,655 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 13:04:22,814 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:04:30,881 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 736 DAG size of output: 289 [2020-07-21 13:04:38,666 WARN L193 SmtUtils]: Spent 7.78 s on a formula simplification. DAG size of input: 700 DAG size of output: 288 [2020-07-21 13:04:38,826 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:04:39,331 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:04:45,128 WARN L193 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 668 DAG size of output: 262 [2020-07-21 13:04:53,085 WARN L193 SmtUtils]: Spent 7.95 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:04:53,599 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:05:01,606 WARN L193 SmtUtils]: Spent 8.00 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:05:10,249 WARN L193 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 737 DAG size of output: 310 [2020-07-21 13:05:18,194 WARN L193 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 730 DAG size of output: 288 [2020-07-21 13:05:18,353 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:05:24,558 WARN L193 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 669 DAG size of output: 279 [2020-07-21 13:05:24,720 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:05:32,748 WARN L193 SmtUtils]: Spent 8.02 s on a formula simplification. DAG size of input: 700 DAG size of output: 288 [2020-07-21 13:05:33,272 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 13:05:39,715 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 669 DAG size of output: 279 [2020-07-21 13:05:47,803 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 736 DAG size of output: 289 [2020-07-21 13:05:56,301 WARN L193 SmtUtils]: Spent 8.49 s on a formula simplification. DAG size of input: 737 DAG size of output: 310 [2020-07-21 13:05:56,459 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:06:04,556 WARN L193 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:06:12,484 WARN L193 SmtUtils]: Spent 7.92 s on a formula simplification. DAG size of input: 736 DAG size of output: 289 [2020-07-21 13:06:12,972 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 13:06:15,878 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 526 DAG size of output: 188 [2020-07-21 13:06:21,970 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 669 DAG size of output: 263 [2020-07-21 13:06:30,100 WARN L193 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:06:37,958 WARN L193 SmtUtils]: Spent 7.85 s on a formula simplification. DAG size of input: 700 DAG size of output: 288 [2020-07-21 13:06:38,117 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:06:38,635 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:06:38,819 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 66 [2020-07-21 13:06:47,197 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 737 DAG size of output: 310 [2020-07-21 13:06:47,354 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:06:48,590 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 423 DAG size of output: 140 [2020-07-21 13:06:49,104 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 13:06:52,020 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 526 DAG size of output: 188 [2020-07-21 13:06:52,524 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 13:06:52,686 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:07:01,126 WARN L193 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 737 DAG size of output: 310 [2020-07-21 13:07:01,286 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:07:09,562 WARN L193 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 737 DAG size of output: 290 [2020-07-21 13:07:09,721 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:07:17,843 WARN L193 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:07:18,032 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 13:07:26,111 WARN L193 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 709 DAG size of output: 289 [2020-07-21 13:07:26,297 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 13:07:28,359 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 482 DAG size of output: 158 [2020-07-21 13:07:34,408 WARN L193 SmtUtils]: Spent 6.05 s on a formula simplification. DAG size of input: 669 DAG size of output: 263 [2020-07-21 13:07:34,568 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:07:37,533 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 526 DAG size of output: 188 [2020-07-21 13:07:39,550 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 482 DAG size of output: 158 [2020-07-21 13:07:40,062 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 13:07:48,270 WARN L193 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 737 DAG size of output: 290 [2020-07-21 13:07:56,183 WARN L193 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 706 DAG size of output: 289 [2020-07-21 13:08:05,886 WARN L193 SmtUtils]: Spent 9.70 s on a formula simplification. DAG size of input: 744 DAG size of output: 297 [2020-07-21 13:08:06,048 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:08:06,238 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 13:08:09,137 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 526 DAG size of output: 188 [2020-07-21 13:08:10,318 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 424 DAG size of output: 125 [2020-07-21 13:08:18,471 WARN L193 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 737 DAG size of output: 290 [2020-07-21 13:08:18,643 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:08:22,478 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 581 DAG size of output: 221 [2020-07-21 13:08:24,534 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 482 DAG size of output: 158 [2020-07-21 13:08:32,406 WARN L193 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 700 DAG size of output: 288 [2020-07-21 13:08:32,901 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 13:08:36,832 WARN L193 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 581 DAG size of output: 221 [2020-07-21 13:08:44,579 WARN L193 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 706 DAG size of output: 289 [2020-07-21 13:08:44,741 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:08:46,705 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 655 DAG size of output: 214 [2020-07-21 13:08:46,895 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 13:08:47,414 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 13:08:55,651 WARN L193 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:08:56,859 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 424 DAG size of output: 125 [2020-07-21 13:09:05,102 WARN L193 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:09:05,264 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:09:05,454 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 13:09:07,435 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 482 DAG size of output: 158 [2020-07-21 13:09:07,948 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 13:09:16,308 WARN L193 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 718 DAG size of output: 289 [2020-07-21 13:09:24,308 WARN L193 SmtUtils]: Spent 8.00 s on a formula simplification. DAG size of input: 700 DAG size of output: 288 [2020-07-21 13:09:24,471 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:09:32,423 WARN L193 SmtUtils]: Spent 7.95 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:09:40,623 WARN L193 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:09:41,160 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 105 [2020-07-21 13:09:41,318 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 13:09:41,835 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 13:09:49,845 WARN L193 SmtUtils]: Spent 8.01 s on a formula simplification. DAG size of input: 706 DAG size of output: 289 [2020-07-21 13:09:57,980 WARN L193 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 739 DAG size of output: 289 [2020-07-21 13:09:59,157 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 424 DAG size of output: 125 [2020-07-21 13:09:59,667 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 13:10:03,117 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 546 DAG size of output: 208 [2020-07-21 13:10:03,274 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63