/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:03:25,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:03:25,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:03:25,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 23:03:25,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:03:25,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:03:25,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:03:25,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:03:25,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:03:25,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:03:25,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:03:25,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:03:25,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:03:25,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:03:25,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:03:25,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:03:25,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:03:25,536 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 23:03:25,556 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:03:25,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:03:25,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:03:25,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:03:25,559 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:03:25,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:03:25,560 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:03:25,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:03:25,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:03:25,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:03:25,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:03:25,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:03:25,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:03:25,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:03:25,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:03:25,562 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:03:25,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:03:25,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:03:25,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:03:25,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:03:25,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:03:25,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:03:25,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:03:25,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:03:25,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:03:25,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:03:25,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:25,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:03:25,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:03:25,565 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:03:25,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:03:25,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:03:25,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:03:25,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:03:25,988 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:03:25,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-21 23:03:26,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da44cef9/8a136526d8484ea8999181db3e97286e/FLAGe50d006e8 [2020-07-21 23:03:26,718 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:03:26,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-21 23:03:26,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da44cef9/8a136526d8484ea8999181db3e97286e/FLAGe50d006e8 [2020-07-21 23:03:26,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da44cef9/8a136526d8484ea8999181db3e97286e [2020-07-21 23:03:26,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:03:26,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:03:26,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:03:26,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:03:26,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:03:26,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:03:26" (1/1) ... [2020-07-21 23:03:26,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ece8b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:26, skipping insertion in model container [2020-07-21 23:03:26,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:03:26" (1/1) ... [2020-07-21 23:03:26,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:03:27,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:03:27,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:03:27,740 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:03:28,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:03:28,057 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:03:28,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28 WrapperNode [2020-07-21 23:03:28,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:03:28,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:03:28,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:03:28,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:03:28,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... [2020-07-21 23:03:28,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:03:28,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:03:28,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:03:28,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:03:28,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:03:28,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:03:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:03:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 23:03:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:03:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 23:03:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:03:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:03:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 23:03:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:03:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:03:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:03:30,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:03:30,234 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:03:30,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:03:30 BoogieIcfgContainer [2020-07-21 23:03:30,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:03:30,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:03:30,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:03:30,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:03:30,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:03:26" (1/3) ... [2020-07-21 23:03:30,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb23080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:03:30, skipping insertion in model container [2020-07-21 23:03:30,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:03:28" (2/3) ... [2020-07-21 23:03:30,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb23080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:03:30, skipping insertion in model container [2020-07-21 23:03:30,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:03:30" (3/3) ... [2020-07-21 23:03:30,268 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-07-21 23:03:30,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:03:30,307 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:03:30,330 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:03:30,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:03:30,390 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:03:30,390 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:03:30,390 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:03:30,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:03:30,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:03:30,391 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:03:30,391 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:03:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-07-21 23:03:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 23:03:30,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:30,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:30,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-07-21 23:03:30,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:30,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045174653] [2020-07-21 23:03:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:30,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:03:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:30,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:03:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:30,919 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 23:03:30,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:30,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045174653] [2020-07-21 23:03:30,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:30,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:03:30,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062355506] [2020-07-21 23:03:30,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:03:30,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:03:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:30,966 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2020-07-21 23:03:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:33,140 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2020-07-21 23:03:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:03:33,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-07-21 23:03:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:33,174 INFO L225 Difference]: With dead ends: 688 [2020-07-21 23:03:33,175 INFO L226 Difference]: Without dead ends: 372 [2020-07-21 23:03:33,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-07-21 23:03:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2020-07-21 23:03:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-07-21 23:03:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2020-07-21 23:03:33,343 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 47 [2020-07-21 23:03:33,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:33,344 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2020-07-21 23:03:33,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:03:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2020-07-21 23:03:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-21 23:03:33,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:33,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:33,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:33,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash 13726601, now seen corresponding path program 1 times [2020-07-21 23:03:33,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:33,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251431806] [2020-07-21 23:03:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:33,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:33,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:03:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:03:33,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:33,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251431806] [2020-07-21 23:03:33,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:33,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:03:33,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141394658] [2020-07-21 23:03:33,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:03:33,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:03:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:03:33,789 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 5 states. [2020-07-21 23:03:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:35,847 INFO L93 Difference]: Finished difference Result 940 states and 1534 transitions. [2020-07-21 23:03:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:03:35,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-07-21 23:03:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:35,867 INFO L225 Difference]: With dead ends: 940 [2020-07-21 23:03:35,868 INFO L226 Difference]: Without dead ends: 574 [2020-07-21 23:03:35,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:03:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-07-21 23:03:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 562. [2020-07-21 23:03:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-07-21 23:03:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 827 transitions. [2020-07-21 23:03:35,988 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 827 transitions. Word has length 116 [2020-07-21 23:03:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:35,989 INFO L479 AbstractCegarLoop]: Abstraction has 562 states and 827 transitions. [2020-07-21 23:03:35,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:03:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 827 transitions. [2020-07-21 23:03:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 23:03:35,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:35,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:36,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:36,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1786227410, now seen corresponding path program 1 times [2020-07-21 23:03:36,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:36,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707886541] [2020-07-21 23:03:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:36,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:03:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:03:36,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:36,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707886541] [2020-07-21 23:03:36,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:36,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:03:36,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126050350] [2020-07-21 23:03:36,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:03:36,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:03:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:03:36,376 INFO L87 Difference]: Start difference. First operand 562 states and 827 transitions. Second operand 5 states. [2020-07-21 23:03:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:38,414 INFO L93 Difference]: Finished difference Result 1702 states and 2578 transitions. [2020-07-21 23:03:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:03:38,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-07-21 23:03:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:38,436 INFO L225 Difference]: With dead ends: 1702 [2020-07-21 23:03:38,437 INFO L226 Difference]: Without dead ends: 1146 [2020-07-21 23:03:38,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:03:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2020-07-21 23:03:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1128. [2020-07-21 23:03:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2020-07-21 23:03:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1574 transitions. [2020-07-21 23:03:38,536 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1574 transitions. Word has length 117 [2020-07-21 23:03:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:38,539 INFO L479 AbstractCegarLoop]: Abstraction has 1128 states and 1574 transitions. [2020-07-21 23:03:38,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:03:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1574 transitions. [2020-07-21 23:03:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-21 23:03:38,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:38,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:38,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:38,766 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:38,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1793655022, now seen corresponding path program 1 times [2020-07-21 23:03:38,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:38,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48798615] [2020-07-21 23:03:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:38,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:03:38,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:03:39,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:39,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48798615] [2020-07-21 23:03:39,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:39,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:03:39,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013701986] [2020-07-21 23:03:39,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:03:39,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:39,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:03:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:03:39,011 INFO L87 Difference]: Start difference. First operand 1128 states and 1574 transitions. Second operand 5 states. [2020-07-21 23:03:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:40,875 INFO L93 Difference]: Finished difference Result 2854 states and 4014 transitions. [2020-07-21 23:03:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:03:40,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-07-21 23:03:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:40,892 INFO L225 Difference]: With dead ends: 2854 [2020-07-21 23:03:40,893 INFO L226 Difference]: Without dead ends: 1732 [2020-07-21 23:03:40,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:03:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2020-07-21 23:03:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1690. [2020-07-21 23:03:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-07-21 23:03:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2243 transitions. [2020-07-21 23:03:41,001 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2243 transitions. Word has length 119 [2020-07-21 23:03:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:41,002 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 2243 transitions. [2020-07-21 23:03:41,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:03:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2243 transitions. [2020-07-21 23:03:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 23:03:41,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:41,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:41,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:41,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1028566563, now seen corresponding path program 1 times [2020-07-21 23:03:41,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:41,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465407117] [2020-07-21 23:03:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:41,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:41,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:41,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 23:03:41,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:41,458 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 4, 1] term [2020-07-21 23:03:41,459 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:03:41,462 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:03:41,464 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:03:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:03:41,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:41,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465407117] [2020-07-21 23:03:41,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:41,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 23:03:41,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862057622] [2020-07-21 23:03:41,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:03:41,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:03:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:03:41,592 INFO L87 Difference]: Start difference. First operand 1690 states and 2243 transitions. Second operand 6 states. [2020-07-21 23:03:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:43,889 INFO L93 Difference]: Finished difference Result 3702 states and 4936 transitions. [2020-07-21 23:03:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:03:43,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2020-07-21 23:03:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:43,907 INFO L225 Difference]: With dead ends: 3702 [2020-07-21 23:03:43,908 INFO L226 Difference]: Without dead ends: 2200 [2020-07-21 23:03:43,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:03:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2020-07-21 23:03:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1888. [2020-07-21 23:03:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1888 states. [2020-07-21 23:03:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2467 transitions. [2020-07-21 23:03:44,007 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2467 transitions. Word has length 142 [2020-07-21 23:03:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:44,009 INFO L479 AbstractCegarLoop]: Abstraction has 1888 states and 2467 transitions. [2020-07-21 23:03:44,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:03:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2467 transitions. [2020-07-21 23:03:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-21 23:03:44,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:44,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:44,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:44,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 189690810, now seen corresponding path program 1 times [2020-07-21 23:03:44,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:44,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095876196] [2020-07-21 23:03:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:44,370 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:44,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:44,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:03:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:44,432 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:03:44,432 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:03:44,434 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:03:44,459 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:03:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-21 23:03:44,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:44,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095876196] [2020-07-21 23:03:44,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:44,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:03:44,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417603686] [2020-07-21 23:03:44,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:03:44,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:03:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:03:44,674 INFO L87 Difference]: Start difference. First operand 1888 states and 2467 transitions. Second operand 5 states. [2020-07-21 23:03:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:46,563 INFO L93 Difference]: Finished difference Result 3804 states and 5006 transitions. [2020-07-21 23:03:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 23:03:46,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-07-21 23:03:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:46,580 INFO L225 Difference]: With dead ends: 3804 [2020-07-21 23:03:46,581 INFO L226 Difference]: Without dead ends: 1922 [2020-07-21 23:03:46,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:03:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2020-07-21 23:03:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1884. [2020-07-21 23:03:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-07-21 23:03:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2429 transitions. [2020-07-21 23:03:46,655 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2429 transitions. Word has length 253 [2020-07-21 23:03:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:46,657 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2429 transitions. [2020-07-21 23:03:46,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:03:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2429 transitions. [2020-07-21 23:03:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 23:03:46,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:46,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:46,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:46,878 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -845755818, now seen corresponding path program 1 times [2020-07-21 23:03:46,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:46,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050967065] [2020-07-21 23:03:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:47,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:03:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:03:47,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-07-21 23:03:47,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:47,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050967065] [2020-07-21 23:03:47,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:47,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:03:47,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143945930] [2020-07-21 23:03:47,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:03:47,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:03:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:47,192 INFO L87 Difference]: Start difference. First operand 1884 states and 2429 transitions. Second operand 3 states. [2020-07-21 23:03:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:48,354 INFO L93 Difference]: Finished difference Result 4498 states and 5783 transitions. [2020-07-21 23:03:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:03:48,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 23:03:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:48,369 INFO L225 Difference]: With dead ends: 4498 [2020-07-21 23:03:48,369 INFO L226 Difference]: Without dead ends: 2244 [2020-07-21 23:03:48,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2020-07-21 23:03:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1692. [2020-07-21 23:03:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1692 states. [2020-07-21 23:03:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2016 transitions. [2020-07-21 23:03:48,431 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2016 transitions. Word has length 339 [2020-07-21 23:03:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:48,433 INFO L479 AbstractCegarLoop]: Abstraction has 1692 states and 2016 transitions. [2020-07-21 23:03:48,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:03:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2016 transitions. [2020-07-21 23:03:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-07-21 23:03:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:48,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:48,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:48,656 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 779395490, now seen corresponding path program 1 times [2020-07-21 23:03:48,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:48,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028174068] [2020-07-21 23:03:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:48,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:03:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:03:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-21 23:03:49,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:03:49,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028174068] [2020-07-21 23:03:49,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:03:49,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:03:49,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920331697] [2020-07-21 23:03:49,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:03:49,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:03:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:49,111 INFO L87 Difference]: Start difference. First operand 1692 states and 2016 transitions. Second operand 3 states. [2020-07-21 23:03:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:50,034 INFO L93 Difference]: Finished difference Result 2064 states and 2468 transitions. [2020-07-21 23:03:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:03:50,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-07-21 23:03:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:50,055 INFO L225 Difference]: With dead ends: 2064 [2020-07-21 23:03:50,057 INFO L226 Difference]: Without dead ends: 2062 [2020-07-21 23:03:50,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:03:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-07-21 23:03:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1696. [2020-07-21 23:03:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2020-07-21 23:03:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2004 transitions. [2020-07-21 23:03:50,122 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2004 transitions. Word has length 361 [2020-07-21 23:03:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:50,123 INFO L479 AbstractCegarLoop]: Abstraction has 1696 states and 2004 transitions. [2020-07-21 23:03:50,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:03:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2004 transitions. [2020-07-21 23:03:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 23:03:50,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:50,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:50,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:50,346 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1203933665, now seen corresponding path program 1 times [2020-07-21 23:03:50,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:50,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721938652] [2020-07-21 23:03:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:50,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:03:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 561 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 23:03:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:03:51,302 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-07-21 23:03:51,334 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 23:03:51,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:51,336 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 23:03:51,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:51,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:51,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-21 23:03:51,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721938652] [2020-07-21 23:03:51,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:03:51,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:03:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981362057] [2020-07-21 23:03:51,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:03:51,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:03:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:03:51,829 INFO L87 Difference]: Start difference. First operand 1696 states and 2004 transitions. Second operand 7 states. [2020-07-21 23:03:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:53,967 INFO L93 Difference]: Finished difference Result 4874 states and 5858 transitions. [2020-07-21 23:03:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:03:53,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 452 [2020-07-21 23:03:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:53,983 INFO L225 Difference]: With dead ends: 4874 [2020-07-21 23:03:53,984 INFO L226 Difference]: Without dead ends: 2814 [2020-07-21 23:03:53,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:03:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-21 23:03:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2260. [2020-07-21 23:03:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2260 states. [2020-07-21 23:03:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2704 transitions. [2020-07-21 23:03:54,062 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2704 transitions. Word has length 452 [2020-07-21 23:03:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:54,062 INFO L479 AbstractCegarLoop]: Abstraction has 2260 states and 2704 transitions. [2020-07-21 23:03:54,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:03:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2704 transitions. [2020-07-21 23:03:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2020-07-21 23:03:54,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:54,082 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:54,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:54,297 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1066963527, now seen corresponding path program 1 times [2020-07-21 23:03:54,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:54,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591807751] [2020-07-21 23:03:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:54,841 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:54,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 23:03:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:54,944 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-21 23:03:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 816 proven. 137 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-07-21 23:03:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:03:55,433 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 23:03:55,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:55,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:03:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 519 proven. 403 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-07-21 23:03:56,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591807751] [2020-07-21 23:03:56,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:03:56,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 23:03:56,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888334012] [2020-07-21 23:03:56,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 23:03:56,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:03:56,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 23:03:56,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:03:56,292 INFO L87 Difference]: Start difference. First operand 2260 states and 2704 transitions. Second operand 11 states. [2020-07-21 23:03:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:03:58,431 INFO L93 Difference]: Finished difference Result 4800 states and 5893 transitions. [2020-07-21 23:03:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 23:03:58,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 536 [2020-07-21 23:03:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:03:58,445 INFO L225 Difference]: With dead ends: 4800 [2020-07-21 23:03:58,446 INFO L226 Difference]: Without dead ends: 2505 [2020-07-21 23:03:58,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 1066 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-07-21 23:03:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2020-07-21 23:03:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2448. [2020-07-21 23:03:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2020-07-21 23:03:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 2786 transitions. [2020-07-21 23:03:58,545 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 2786 transitions. Word has length 536 [2020-07-21 23:03:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:03:58,546 INFO L479 AbstractCegarLoop]: Abstraction has 2448 states and 2786 transitions. [2020-07-21 23:03:58,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 23:03:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 2786 transitions. [2020-07-21 23:03:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-07-21 23:03:58,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:03:58,559 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:03:58,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:58,774 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:03:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:03:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1282643571, now seen corresponding path program 2 times [2020-07-21 23:03:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:03:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346266080] [2020-07-21 23:03:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:03:59,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:03:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:03:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 23:03:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:03:59,617 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2020-07-21 23:03:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 671 proven. 220 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-21 23:03:59,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:00,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 436 proven. 182 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-21 23:04:00,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346266080] [2020-07-21 23:04:00,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:00,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-07-21 23:04:00,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612995857] [2020-07-21 23:04:00,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 23:04:00,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 23:04:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:04:00,594 INFO L87 Difference]: Start difference. First operand 2448 states and 2786 transitions. Second operand 11 states. [2020-07-21 23:04:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:03,641 INFO L93 Difference]: Finished difference Result 7658 states and 8897 transitions. [2020-07-21 23:04:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 23:04:03,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 562 [2020-07-21 23:04:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:03,672 INFO L225 Difference]: With dead ends: 7658 [2020-07-21 23:04:03,672 INFO L226 Difference]: Without dead ends: 5216 [2020-07-21 23:04:03,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1117 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-07-21 23:04:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2020-07-21 23:04:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 4846. [2020-07-21 23:04:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4846 states. [2020-07-21 23:04:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 5655 transitions. [2020-07-21 23:04:03,853 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 5655 transitions. Word has length 562 [2020-07-21 23:04:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:03,854 INFO L479 AbstractCegarLoop]: Abstraction has 4846 states and 5655 transitions. [2020-07-21 23:04:03,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 23:04:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 5655 transitions. [2020-07-21 23:04:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2020-07-21 23:04:03,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:03,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:04,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:04,078 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1935935179, now seen corresponding path program 1 times [2020-07-21 23:04:04,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:04,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064060180] [2020-07-21 23:04:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:04,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:04:04,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 23:04:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:04,835 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-07-21 23:04:05,020 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 23:04:05,021 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:04:05,022 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 23:04:05,023 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 23:04:05,026 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:04:05,027 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-21 23:04:05,028 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 23:04:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 673 proven. 220 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-21 23:04:05,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:05,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:05,781 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 23:04:05,782 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 23:04:05,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:05,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:05,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:05,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:05,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:05,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:05,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:06,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:06,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 436 proven. 184 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-21 23:04:07,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064060180] [2020-07-21 23:04:07,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:07,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2020-07-21 23:04:07,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099716994] [2020-07-21 23:04:07,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:04:07,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:04:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:04:07,567 INFO L87 Difference]: Start difference. First operand 4846 states and 5655 transitions. Second operand 13 states. [2020-07-21 23:04:11,007 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-21 23:04:11,180 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-07-21 23:04:12,190 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 23:04:12,405 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-07-21 23:04:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:13,135 INFO L93 Difference]: Finished difference Result 10252 states and 12150 transitions. [2020-07-21 23:04:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 23:04:13,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 614 [2020-07-21 23:04:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:13,178 INFO L225 Difference]: With dead ends: 10252 [2020-07-21 23:04:13,180 INFO L226 Difference]: Without dead ends: 5962 [2020-07-21 23:04:13,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1224 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-07-21 23:04:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2020-07-21 23:04:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5762. [2020-07-21 23:04:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5762 states. [2020-07-21 23:04:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 6727 transitions. [2020-07-21 23:04:13,375 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 6727 transitions. Word has length 614 [2020-07-21 23:04:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:13,377 INFO L479 AbstractCegarLoop]: Abstraction has 5762 states and 6727 transitions. [2020-07-21 23:04:13,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:04:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 6727 transitions. [2020-07-21 23:04:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-07-21 23:04:13,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:13,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:13,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:13,611 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 629641869, now seen corresponding path program 1 times [2020-07-21 23:04:13,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:13,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054547457] [2020-07-21 23:04:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:13,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:04:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-07-21 23:04:14,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 552 proven. 74 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-07-21 23:04:14,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054547457] [2020-07-21 23:04:14,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:14,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:04:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643513760] [2020-07-21 23:04:14,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:04:14,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:04:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:04:14,757 INFO L87 Difference]: Start difference. First operand 5762 states and 6727 transitions. Second operand 7 states. [2020-07-21 23:04:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:16,840 INFO L93 Difference]: Finished difference Result 12252 states and 14350 transitions. [2020-07-21 23:04:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:04:16,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 636 [2020-07-21 23:04:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:16,869 INFO L225 Difference]: With dead ends: 12252 [2020-07-21 23:04:16,869 INFO L226 Difference]: Without dead ends: 7046 [2020-07-21 23:04:16,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1279 GetRequests, 1269 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:04:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2020-07-21 23:04:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 6500. [2020-07-21 23:04:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2020-07-21 23:04:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 7312 transitions. [2020-07-21 23:04:17,072 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 7312 transitions. Word has length 636 [2020-07-21 23:04:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:17,073 INFO L479 AbstractCegarLoop]: Abstraction has 6500 states and 7312 transitions. [2020-07-21 23:04:17,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:04:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 7312 transitions. [2020-07-21 23:04:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-21 23:04:17,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:17,089 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:17,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:17,304 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1261042937, now seen corresponding path program 1 times [2020-07-21 23:04:17,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:17,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752017836] [2020-07-21 23:04:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:17,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 23:04:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:17,770 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-07-21 23:04:17,770 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 988 proven. 2 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2020-07-21 23:04:18,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:18,327 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 23:04:18,375 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 1] term [2020-07-21 23:04:18,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:18,376 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 23:04:18,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:18,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:18,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:18,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:18,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 675 proven. 74 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-21 23:04:19,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752017836] [2020-07-21 23:04:19,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:19,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:04:19,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194801969] [2020-07-21 23:04:19,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:04:19,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:04:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:04:19,319 INFO L87 Difference]: Start difference. First operand 6500 states and 7312 transitions. Second operand 7 states. [2020-07-21 23:04:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:21,838 INFO L93 Difference]: Finished difference Result 13366 states and 15097 transitions. [2020-07-21 23:04:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:04:21,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 650 [2020-07-21 23:04:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:21,875 INFO L225 Difference]: With dead ends: 13366 [2020-07-21 23:04:21,876 INFO L226 Difference]: Without dead ends: 6866 [2020-07-21 23:04:21,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:04:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2020-07-21 23:04:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6678. [2020-07-21 23:04:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6678 states. [2020-07-21 23:04:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 7362 transitions. [2020-07-21 23:04:22,056 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 7362 transitions. Word has length 650 [2020-07-21 23:04:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:22,058 INFO L479 AbstractCegarLoop]: Abstraction has 6678 states and 7362 transitions. [2020-07-21 23:04:22,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:04:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 7362 transitions. [2020-07-21 23:04:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2020-07-21 23:04:22,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:22,072 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:22,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:22,286 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1287824626, now seen corresponding path program 1 times [2020-07-21 23:04:22,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:22,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357309710] [2020-07-21 23:04:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:22,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:04:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:04:22,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:22,644 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:04:22,645 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:22,645 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:22,672 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 1587 proven. 6 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-07-21 23:04:23,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:23,178 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 23:04:23,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:23,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:23,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:23,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:23,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 776 proven. 366 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2020-07-21 23:04:24,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357309710] [2020-07-21 23:04:24,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:24,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 23:04:24,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386282557] [2020-07-21 23:04:24,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:04:24,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:04:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:04:24,076 INFO L87 Difference]: Start difference. First operand 6678 states and 7362 transitions. Second operand 13 states. [2020-07-21 23:04:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:29,385 INFO L93 Difference]: Finished difference Result 13194 states and 14646 transitions. [2020-07-21 23:04:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 23:04:29,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 723 [2020-07-21 23:04:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:29,415 INFO L225 Difference]: With dead ends: 13194 [2020-07-21 23:04:29,416 INFO L226 Difference]: Without dead ends: 7072 [2020-07-21 23:04:29,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1481 GetRequests, 1450 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-07-21 23:04:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2020-07-21 23:04:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6496. [2020-07-21 23:04:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6496 states. [2020-07-21 23:04:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 7078 transitions. [2020-07-21 23:04:29,672 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 7078 transitions. Word has length 723 [2020-07-21 23:04:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:29,674 INFO L479 AbstractCegarLoop]: Abstraction has 6496 states and 7078 transitions. [2020-07-21 23:04:29,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:04:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 7078 transitions. [2020-07-21 23:04:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 23:04:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:29,708 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:30,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:30,076 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1556654866, now seen corresponding path program 1 times [2020-07-21 23:04:30,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:30,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050861085] [2020-07-21 23:04:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:30,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:04:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:04:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 1450 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2020-07-21 23:04:31,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 623 proven. 148 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2020-07-21 23:04:31,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050861085] [2020-07-21 23:04:31,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:31,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 23:04:31,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503637736] [2020-07-21 23:04:31,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:04:31,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:31,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:04:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:04:31,453 INFO L87 Difference]: Start difference. First operand 6496 states and 7078 transitions. Second operand 6 states. [2020-07-21 23:04:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:32,937 INFO L93 Difference]: Finished difference Result 12988 states and 14252 transitions. [2020-07-21 23:04:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:04:32,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 871 [2020-07-21 23:04:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:32,960 INFO L225 Difference]: With dead ends: 12988 [2020-07-21 23:04:32,961 INFO L226 Difference]: Without dead ends: 7048 [2020-07-21 23:04:32,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1747 GetRequests, 1738 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:04:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2020-07-21 23:04:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 7048. [2020-07-21 23:04:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-07-21 23:04:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 7638 transitions. [2020-07-21 23:04:33,139 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 7638 transitions. Word has length 871 [2020-07-21 23:04:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:33,140 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 7638 transitions. [2020-07-21 23:04:33,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:04:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 7638 transitions. [2020-07-21 23:04:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2020-07-21 23:04:33,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:33,163 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:33,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:33,371 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1319533531, now seen corresponding path program 1 times [2020-07-21 23:04:33,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:33,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796029604] [2020-07-21 23:04:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:33,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:04:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 854 proven. 2 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2020-07-21 23:04:34,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:34,578 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 23:04:34,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:34,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 854 proven. 2 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2020-07-21 23:04:35,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796029604] [2020-07-21 23:04:35,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:35,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:04:35,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339577899] [2020-07-21 23:04:35,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:04:35,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:04:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:04:35,366 INFO L87 Difference]: Start difference. First operand 7048 states and 7638 transitions. Second operand 7 states. [2020-07-21 23:04:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:37,827 INFO L93 Difference]: Finished difference Result 13542 states and 14717 transitions. [2020-07-21 23:04:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:04:37,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 970 [2020-07-21 23:04:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:37,868 INFO L225 Difference]: With dead ends: 13542 [2020-07-21 23:04:37,868 INFO L226 Difference]: Without dead ends: 7050 [2020-07-21 23:04:37,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1949 GetRequests, 1939 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:04:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-07-21 23:04:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 7048. [2020-07-21 23:04:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-07-21 23:04:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 7595 transitions. [2020-07-21 23:04:38,087 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 7595 transitions. Word has length 970 [2020-07-21 23:04:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:38,089 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 7595 transitions. [2020-07-21 23:04:38,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:04:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 7595 transitions. [2020-07-21 23:04:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2020-07-21 23:04:38,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:38,118 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:38,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:38,333 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:38,334 INFO L82 PathProgramCache]: Analyzing trace with hash -795352435, now seen corresponding path program 1 times [2020-07-21 23:04:38,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:38,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502334512] [2020-07-21 23:04:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:38,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:38,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 23:04:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:38,880 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-07-21 23:04:38,880 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 1684 proven. 2 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2020-07-21 23:04:39,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:39,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:39,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:39,607 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 2, 1] term [2020-07-21 23:04:39,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:39,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:39,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:39,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 735 proven. 144 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2020-07-21 23:04:40,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502334512] [2020-07-21 23:04:40,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:40,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:04:40,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695106584] [2020-07-21 23:04:40,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:04:40,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:04:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:04:40,591 INFO L87 Difference]: Start difference. First operand 7048 states and 7595 transitions. Second operand 7 states. [2020-07-21 23:04:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:43,111 INFO L93 Difference]: Finished difference Result 13916 states and 15085 transitions. [2020-07-21 23:04:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:04:43,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 974 [2020-07-21 23:04:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:43,129 INFO L225 Difference]: With dead ends: 13916 [2020-07-21 23:04:43,129 INFO L226 Difference]: Without dead ends: 7424 [2020-07-21 23:04:43,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1955 GetRequests, 1945 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:04:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2020-07-21 23:04:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 7228. [2020-07-21 23:04:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7228 states. [2020-07-21 23:04:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 7745 transitions. [2020-07-21 23:04:43,344 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 7745 transitions. Word has length 974 [2020-07-21 23:04:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:43,346 INFO L479 AbstractCegarLoop]: Abstraction has 7228 states and 7745 transitions. [2020-07-21 23:04:43,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:04:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 7745 transitions. [2020-07-21 23:04:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2020-07-21 23:04:43,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:43,371 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:43,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:43,585 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:43,587 INFO L82 PathProgramCache]: Analyzing trace with hash -846687554, now seen corresponding path program 1 times [2020-07-21 23:04:43,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:43,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94033947] [2020-07-21 23:04:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:44,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:04:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:44,410 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:04:44,411 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:44,413 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 4, 1] term [2020-07-21 23:04:44,413 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:44,456 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3636 backedges. 2236 proven. 6 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2020-07-21 23:04:45,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:45,459 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 23:04:45,516 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 2, 1] term [2020-07-21 23:04:45,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:45,518 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 1] term [2020-07-21 23:04:45,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:45,518 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 23:04:45,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,520 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 2, 2, 2, 1] term [2020-07-21 23:04:45,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,523 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 2, 1] term [2020-07-21 23:04:45,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:45,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:45,611 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:04:45,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:45,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:45,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3636 backedges. 1603 proven. 258 refuted. 0 times theorem prover too weak. 1775 trivial. 0 not checked. [2020-07-21 23:04:47,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94033947] [2020-07-21 23:04:47,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:47,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 23:04:47,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267445034] [2020-07-21 23:04:47,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:04:47,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:04:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:04:47,085 INFO L87 Difference]: Start difference. First operand 7228 states and 7745 transitions. Second operand 12 states. [2020-07-21 23:04:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:51,287 INFO L93 Difference]: Finished difference Result 13856 states and 15182 transitions. [2020-07-21 23:04:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 23:04:51,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1017 [2020-07-21 23:04:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:51,306 INFO L225 Difference]: With dead ends: 13856 [2020-07-21 23:04:51,307 INFO L226 Difference]: Without dead ends: 6804 [2020-07-21 23:04:51,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2055 GetRequests, 2031 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-21 23:04:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2020-07-21 23:04:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 6488. [2020-07-21 23:04:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6488 states. [2020-07-21 23:04:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6488 states to 6488 states and 6881 transitions. [2020-07-21 23:04:51,421 INFO L78 Accepts]: Start accepts. Automaton has 6488 states and 6881 transitions. Word has length 1017 [2020-07-21 23:04:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:51,422 INFO L479 AbstractCegarLoop]: Abstraction has 6488 states and 6881 transitions. [2020-07-21 23:04:51,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:04:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6488 states and 6881 transitions. [2020-07-21 23:04:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-07-21 23:04:51,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:51,442 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:51,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:51,656 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -770795566, now seen corresponding path program 1 times [2020-07-21 23:04:51,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:51,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379619212] [2020-07-21 23:04:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:04:52,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:52,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:04:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:52,164 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 3, 1] term [2020-07-21 23:04:52,165 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:04:52,166 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:04:52,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:04:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 971 proven. 2 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2020-07-21 23:04:52,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:53,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:53,077 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:04:53,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:53,080 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 23:04:53,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:53,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:53,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:53,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 971 proven. 2 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2020-07-21 23:04:54,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379619212] [2020-07-21 23:04:54,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:04:54,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 23:04:54,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201414476] [2020-07-21 23:04:54,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:04:54,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:04:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:04:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:04:54,397 INFO L87 Difference]: Start difference. First operand 6488 states and 6881 transitions. Second operand 7 states. [2020-07-21 23:04:57,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:04:57,481 INFO L93 Difference]: Finished difference Result 12236 states and 13017 transitions. [2020-07-21 23:04:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:04:57,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1049 [2020-07-21 23:04:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:04:57,500 INFO L225 Difference]: With dead ends: 12236 [2020-07-21 23:04:57,501 INFO L226 Difference]: Without dead ends: 6116 [2020-07-21 23:04:57,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2107 GetRequests, 2096 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:04:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2020-07-21 23:04:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5750. [2020-07-21 23:04:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5750 states. [2020-07-21 23:04:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 5965 transitions. [2020-07-21 23:04:57,635 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 5965 transitions. Word has length 1049 [2020-07-21 23:04:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:04:57,636 INFO L479 AbstractCegarLoop]: Abstraction has 5750 states and 5965 transitions. [2020-07-21 23:04:57,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:04:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 5965 transitions. [2020-07-21 23:04:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1098 [2020-07-21 23:04:57,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:04:57,656 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:04:57,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:04:57,858 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:04:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:04:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1467967182, now seen corresponding path program 1 times [2020-07-21 23:04:57,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:04:57,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090024670] [2020-07-21 23:04:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:04:58,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:04:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:04:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:04:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:04:58,332 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:04:58,333 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:04:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3737 backedges. 2216 proven. 6 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2020-07-21 23:04:59,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:04:59,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:59,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:59,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:04:59,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:04:59,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:04:59,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:05:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3737 backedges. 1693 proven. 269 refuted. 0 times theorem prover too weak. 1775 trivial. 0 not checked. [2020-07-21 23:05:00,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090024670] [2020-07-21 23:05:00,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:05:00,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-07-21 23:05:00,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917316840] [2020-07-21 23:05:00,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:05:00,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:05:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:05:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:05:00,446 INFO L87 Difference]: Start difference. First operand 5750 states and 5965 transitions. Second operand 12 states. [2020-07-21 23:05:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:05:07,088 INFO L93 Difference]: Finished difference Result 11496 states and 11964 transitions. [2020-07-21 23:05:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 23:05:07,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1097 [2020-07-21 23:05:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:05:07,113 INFO L225 Difference]: With dead ends: 11496 [2020-07-21 23:05:07,113 INFO L226 Difference]: Without dead ends: 6302 [2020-07-21 23:05:07,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2215 GetRequests, 2193 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2020-07-21 23:05:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2020-07-21 23:05:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6300. [2020-07-21 23:05:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-07-21 23:05:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 6491 transitions. [2020-07-21 23:05:07,288 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 6491 transitions. Word has length 1097 [2020-07-21 23:05:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:05:07,292 INFO L479 AbstractCegarLoop]: Abstraction has 6300 states and 6491 transitions. [2020-07-21 23:05:07,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:05:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 6491 transitions. [2020-07-21 23:05:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1515 [2020-07-21 23:05:07,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:05:07,331 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:05:07,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:05:07,546 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:05:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:05:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1398103861, now seen corresponding path program 1 times [2020-07-21 23:05:07,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:05:07,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105009785] [2020-07-21 23:05:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:05:08,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:05:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:05:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:05:08,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:05:08,221 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:05:08,222 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:05:08,223 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,223 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 23:05:08,224 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,226 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,226 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,227 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 23:05:08,229 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:05:08,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,231 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 23:05:08,233 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,234 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,235 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,237 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:05:08,237 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,239 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,241 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,243 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,244 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,245 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 23:05:08,246 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,247 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:08,248 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 23:05:31,364 WARN L193 SmtUtils]: Spent 20.94 s on a formula simplification. DAG size of input: 104 DAG size of output: 46 [2020-07-21 23:05:33,489 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:05:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6489 backedges. 1708 proven. 43 refuted. 0 times theorem prover too weak. 4738 trivial. 0 not checked. [2020-07-21 23:05:36,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:05:36,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:05:36,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:05:36,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:05:36,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:05:36,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:05:36,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:05:36,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:05:36,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:05:36,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:05:36,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:05:36,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:05:53,134 WARN L193 SmtUtils]: Spent 14.34 s on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2020-07-21 23:05:53,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105009785] [2020-07-21 23:05:53,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:05:53,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 23:05:53,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836820780] [2020-07-21 23:05:53,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:05:53,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:05:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:05:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2020-07-21 23:05:53,141 INFO L87 Difference]: Start difference. First operand 6300 states and 6491 transitions. Second operand 6 states. [2020-07-21 23:11:44,413 WARN L193 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-07-21 23:11:47,183 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-07-21 23:13:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:15,577 INFO L93 Difference]: Finished difference Result 13340 states and 13773 transitions. [2020-07-21 23:13:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:13:15,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1514 [2020-07-21 23:13:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:15,625 INFO L225 Difference]: With dead ends: 13340 [2020-07-21 23:13:15,625 INFO L226 Difference]: Without dead ends: 7226 [2020-07-21 23:13:15,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1552 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=32, Invalid=75, Unknown=3, NotChecked=0, Total=110 [2020-07-21 23:13:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2020-07-21 23:13:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6860. [2020-07-21 23:13:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6860 states. [2020-07-21 23:13:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6860 states to 6860 states and 7068 transitions. [2020-07-21 23:13:15,741 INFO L78 Accepts]: Start accepts. Automaton has 6860 states and 7068 transitions. Word has length 1514 [2020-07-21 23:13:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:15,743 INFO L479 AbstractCegarLoop]: Abstraction has 6860 states and 7068 transitions. [2020-07-21 23:13:15,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:13:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6860 states and 7068 transitions. [2020-07-21 23:13:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2020-07-21 23:13:15,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:15,770 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:15,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:15,976 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1464304767, now seen corresponding path program 1 times [2020-07-21 23:13:15,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:15,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530020848] [2020-07-21 23:13:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:13:16,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:13:16,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2251 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:13:16,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:16,969 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:13:16,969 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:13:19,333 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-21 23:13:21,494 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:13:23,741 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2020-07-21 23:13:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8459 backedges. 2514 proven. 88 refuted. 0 times theorem prover too weak. 5857 trivial. 0 not checked. [2020-07-21 23:13:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:25,549 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:13:25,719 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 23:13:25,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:13:25,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:13:25,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:13:26,046 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2020-07-21 23:13:26,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530020848] [2020-07-21 23:13:26,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:13:26,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 23:13:26,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212124075] [2020-07-21 23:13:26,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:13:26,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:13:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=59, Unknown=2, NotChecked=0, Total=90 [2020-07-21 23:13:26,058 INFO L87 Difference]: Start difference. First operand 6860 states and 7068 transitions. Second operand 8 states. [2020-07-21 23:13:45,067 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 23:13:45,948 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 6 [2020-07-21 23:14:00,094 WARN L193 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-07-21 23:14:33,494 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 32 DAG size of output: 13 [2020-07-21 23:14:35,914 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 16 [2020-07-21 23:14:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:14:49,810 INFO L93 Difference]: Finished difference Result 14462 states and 14936 transitions. [2020-07-21 23:14:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 23:14:49,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1650 [2020-07-21 23:14:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:14:49,845 INFO L225 Difference]: With dead ends: 14462 [2020-07-21 23:14:49,845 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:14:49,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1705 GetRequests, 1689 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=100, Invalid=169, Unknown=3, NotChecked=0, Total=272 [2020-07-21 23:14:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:14:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:14:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:14:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:14:49,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1650 [2020-07-21 23:14:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:14:49,860 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:14:49,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:14:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:14:49,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:14:50,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:14:50,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:14:56,183 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 519 [2020-07-21 23:14:56,742 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 519 [2020-07-21 23:14:57,485 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 23:14:59,342 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 109 DAG size of output: 32 [2020-07-21 23:17:35,373 WARN L193 SmtUtils]: Spent 2.60 m on a formula simplification. DAG size of input: 465 DAG size of output: 192 [2020-07-21 23:17:35,656 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14