/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/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:05:09,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:05:09,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:05:09,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 01:05:10,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:05:10,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:05:10,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:05:10,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:05:10,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:05:10,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:05:10,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:05:10,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:05:10,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:05:10,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:05:10,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:05:10,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:05:10,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:05:10,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:05:10,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:05:10,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:05:10,052 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 01:05:10,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:05:10,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:05:10,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:05:10,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:05:10,089 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:05:10,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:05:10,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:05:10,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:05:10,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:05:10,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:05:10,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:05:10,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:05:10,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:05:10,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:05:10,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:05:10,091 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:05:10,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:05:10,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:05:10,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:05:10,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:05:10,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:05:10,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:05:10,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:05:10,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:05:10,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:05:10,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:05:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:10,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:05:10,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:05:10,095 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 01:05:10,652 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:05:10,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:05:10,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:05:10,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:05:10,709 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:05:10,712 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-07-21 01:05:10,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b24796/962b8bce561e46c3b56d137373317361/FLAG53370f683 [2020-07-21 01:05:11,546 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:05:11,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-07-21 01:05:11,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b24796/962b8bce561e46c3b56d137373317361/FLAG53370f683 [2020-07-21 01:05:11,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b24796/962b8bce561e46c3b56d137373317361 [2020-07-21 01:05:11,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:05:11,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:05:11,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:11,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:05:11,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:05:11,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:11" (1/1) ... [2020-07-21 01:05:11,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612f78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:11, skipping insertion in model container [2020-07-21 01:05:11,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:11" (1/1) ... [2020-07-21 01:05:11,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:05:11,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:05:12,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:12,211 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:05:12,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:05:12,259 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:05:12,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12 WrapperNode [2020-07-21 01:05:12,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:05:12,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:05:12,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:05:12,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:05:12,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (1/1) ... [2020-07-21 01:05:12,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:05:12,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:05:12,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:05:12,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:05:12,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (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 01:05:12,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:05:12,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:05:12,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:05:12,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:05:12,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:05:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:05:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:05:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:05:13,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:05:13,146 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:05:13,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:13 BoogieIcfgContainer [2020-07-21 01:05:13,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:05:13,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:05:13,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:05:13,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:05:13,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:05:11" (1/3) ... [2020-07-21 01:05:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f38932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:13, skipping insertion in model container [2020-07-21 01:05:13,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:12" (2/3) ... [2020-07-21 01:05:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f38932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:13, skipping insertion in model container [2020-07-21 01:05:13,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:13" (3/3) ... [2020-07-21 01:05:13,170 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-07-21 01:05:13,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:05:13,196 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:05:13,223 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:05:13,262 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:05:13,263 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:05:13,263 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:05:13,263 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:05:13,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:05:13,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:05:13,264 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:05:13,264 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:05:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-21 01:05:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:05:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:13,311 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] [2020-07-21 01:05:13,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:13,322 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-07-21 01:05:13,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:13,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841888231] [2020-07-21 01:05:13,334 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 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 01:05:13,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:13,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:13,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:13,586 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 01:05:13,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:13,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841888231] [2020-07-21 01:05:13,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:13,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:13,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258393711] [2020-07-21 01:05:13,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:13,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:13,625 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-07-21 01:05:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:13,717 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-07-21 01:05:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:13,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 01:05:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:13,742 INFO L225 Difference]: With dead ends: 87 [2020-07-21 01:05:13,742 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 01:05:13,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 01:05:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 01:05:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 01:05:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 01:05:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-07-21 01:05:13,820 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-07-21 01:05:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:13,822 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-07-21 01:05:13,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-07-21 01:05:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:05:13,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:13,825 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] [2020-07-21 01:05:14,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:14,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:14,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-07-21 01:05:14,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:14,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642971026] [2020-07-21 01:05:14,041 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 01:05:14,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:14,197 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 01:05:14,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:14,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642971026] [2020-07-21 01:05:14,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:14,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:14,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58804676] [2020-07-21 01:05:14,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:14,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:14,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:14,216 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-07-21 01:05:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:14,293 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-07-21 01:05:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:14,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 01:05:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:14,300 INFO L225 Difference]: With dead ends: 117 [2020-07-21 01:05:14,304 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 01:05:14,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 01:05:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 01:05:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 01:05:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 01:05:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-07-21 01:05:14,352 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-07-21 01:05:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:14,353 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-07-21 01:05:14,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-07-21 01:05:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:05:14,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:14,357 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] [2020-07-21 01:05:14,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:14,568 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-07-21 01:05:14,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:14,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805993525] [2020-07-21 01:05:14,571 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 01:05:14,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:05:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:14,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:14,656 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 01:05:14,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:14,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805993525] [2020-07-21 01:05:14,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:14,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:14,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746290797] [2020-07-21 01:05:14,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:14,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:14,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:14,661 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-07-21 01:05:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:14,700 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-07-21 01:05:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:14,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 01:05:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:14,704 INFO L225 Difference]: With dead ends: 108 [2020-07-21 01:05:14,705 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 01:05:14,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 01:05:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 01:05:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-07-21 01:05:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 01:05:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-07-21 01:05:14,725 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-07-21 01:05:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:14,726 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-07-21 01:05:14,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-07-21 01:05:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:05:14,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:14,728 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] [2020-07-21 01:05:14,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:14,943 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-07-21 01:05:14,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:14,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081195757] [2020-07-21 01:05:14,945 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 01:05:15,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:15,033 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 01:05:15,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:15,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081195757] [2020-07-21 01:05:15,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:15,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:15,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449663233] [2020-07-21 01:05:15,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:15,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:15,038 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-07-21 01:05:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:15,085 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-07-21 01:05:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:15,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 01:05:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:15,093 INFO L225 Difference]: With dead ends: 136 [2020-07-21 01:05:15,093 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 01:05:15,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 01:05:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 01:05:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-07-21 01:05:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 01:05:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-07-21 01:05:15,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-07-21 01:05:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:15,131 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-07-21 01:05:15,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-07-21 01:05:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:05:15,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:15,133 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] [2020-07-21 01:05:15,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:15,350 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:15,351 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-07-21 01:05:15,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:15,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595811174] [2020-07-21 01:05:15,354 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 01:05:15,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:15,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:15,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:15,486 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 01:05:15,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:15,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595811174] [2020-07-21 01:05:15,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:15,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:15,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033754759] [2020-07-21 01:05:15,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:15,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:15,493 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-07-21 01:05:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:15,533 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-07-21 01:05:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:15,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 01:05:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:15,536 INFO L225 Difference]: With dead ends: 224 [2020-07-21 01:05:15,537 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 01:05:15,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 01:05:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 01:05:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-21 01:05:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 01:05:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-07-21 01:05:15,555 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-07-21 01:05:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:15,556 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-07-21 01:05:15,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-07-21 01:05:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:05:15,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:15,558 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] [2020-07-21 01:05:15,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:15,771 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-07-21 01:05:15,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:15,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449204461] [2020-07-21 01:05:15,774 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 01:05:15,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:15,852 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 01:05:15,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:15,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449204461] [2020-07-21 01:05:15,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:15,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:15,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768053155] [2020-07-21 01:05:15,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:15,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:15,856 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-07-21 01:05:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:15,894 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-07-21 01:05:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:15,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 01:05:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:15,903 INFO L225 Difference]: With dead ends: 201 [2020-07-21 01:05:15,904 INFO L226 Difference]: Without dead ends: 138 [2020-07-21 01:05:15,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 01:05:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-21 01:05:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-21 01:05:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 01:05:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-07-21 01:05:15,935 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-07-21 01:05:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:15,943 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-07-21 01:05:15,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-07-21 01:05:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:05:15,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:15,948 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] [2020-07-21 01:05:16,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:16,163 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-07-21 01:05:16,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:16,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959031327] [2020-07-21 01:05:16,164 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 01:05:16,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:16,247 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 01:05:16,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:16,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959031327] [2020-07-21 01:05:16,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:16,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:16,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634016069] [2020-07-21 01:05:16,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:16,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:16,250 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-07-21 01:05:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:16,285 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-07-21 01:05:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:16,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 01:05:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:16,288 INFO L225 Difference]: With dead ends: 252 [2020-07-21 01:05:16,289 INFO L226 Difference]: Without dead ends: 250 [2020-07-21 01:05:16,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 01:05:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-21 01:05:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-07-21 01:05:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 01:05:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-07-21 01:05:16,309 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-07-21 01:05:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:16,310 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-07-21 01:05:16,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-07-21 01:05:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:05:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:16,314 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] [2020-07-21 01:05:16,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:16,530 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-07-21 01:05:16,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:16,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457772650] [2020-07-21 01:05:16,532 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 01:05:16,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:16,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:16,607 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 01:05:16,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:16,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457772650] [2020-07-21 01:05:16,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:16,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:16,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241472558] [2020-07-21 01:05:16,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:16,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:16,613 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-07-21 01:05:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:16,645 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-07-21 01:05:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:16,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 01:05:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:16,649 INFO L225 Difference]: With dead ends: 432 [2020-07-21 01:05:16,649 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 01:05:16,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 01:05:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 01:05:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-21 01:05:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-21 01:05:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-07-21 01:05:16,672 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-07-21 01:05:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:16,672 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-07-21 01:05:16,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-07-21 01:05:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:05:16,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:16,675 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] [2020-07-21 01:05:16,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:16,890 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-07-21 01:05:16,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:16,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956124427] [2020-07-21 01:05:16,893 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 01:05:16,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:16,958 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 01:05:16,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:16,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956124427] [2020-07-21 01:05:16,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:16,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:16,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945783183] [2020-07-21 01:05:16,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:16,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:16,962 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-07-21 01:05:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:16,993 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-07-21 01:05:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:16,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 01:05:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:16,997 INFO L225 Difference]: With dead ends: 384 [2020-07-21 01:05:16,997 INFO L226 Difference]: Without dead ends: 262 [2020-07-21 01:05:16,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 01:05:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-21 01:05:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-07-21 01:05:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-21 01:05:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-07-21 01:05:17,017 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-07-21 01:05:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:17,018 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-07-21 01:05:17,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-07-21 01:05:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:05:17,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:17,021 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] [2020-07-21 01:05:17,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:17,238 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-07-21 01:05:17,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:17,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549701506] [2020-07-21 01:05:17,240 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 01:05:17,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:17,315 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 01:05:17,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:17,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549701506] [2020-07-21 01:05:17,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:17,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:17,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328913929] [2020-07-21 01:05:17,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:17,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:17,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:17,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:17,320 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-07-21 01:05:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:17,368 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-07-21 01:05:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:17,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 01:05:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:17,378 INFO L225 Difference]: With dead ends: 476 [2020-07-21 01:05:17,379 INFO L226 Difference]: Without dead ends: 474 [2020-07-21 01:05:17,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 01:05:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-07-21 01:05:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-07-21 01:05:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-21 01:05:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-07-21 01:05:17,408 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-07-21 01:05:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:17,409 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-07-21 01:05:17,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-07-21 01:05:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:05:17,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:17,413 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] [2020-07-21 01:05:17,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:17,629 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-07-21 01:05:17,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:17,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121070806] [2020-07-21 01:05:17,632 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 01:05:17,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:17,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:17,701 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 01:05:17,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:17,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121070806] [2020-07-21 01:05:17,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:17,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:17,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566544321] [2020-07-21 01:05:17,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:17,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:17,712 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-07-21 01:05:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:17,764 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-07-21 01:05:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:17,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 01:05:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:17,770 INFO L225 Difference]: With dead ends: 844 [2020-07-21 01:05:17,770 INFO L226 Difference]: Without dead ends: 498 [2020-07-21 01:05:17,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 01:05:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-07-21 01:05:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-07-21 01:05:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-21 01:05:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-07-21 01:05:17,804 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-07-21 01:05:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:17,805 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-07-21 01:05:17,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-07-21 01:05:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:05:17,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:17,808 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] [2020-07-21 01:05:18,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:18,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:18,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-07-21 01:05:18,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:18,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979757787] [2020-07-21 01:05:18,026 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 01:05:18,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:18,118 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 01:05:18,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:18,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979757787] [2020-07-21 01:05:18,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:18,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:18,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112103612] [2020-07-21 01:05:18,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:18,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:18,129 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-07-21 01:05:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:18,176 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-07-21 01:05:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:18,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 01:05:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:18,184 INFO L225 Difference]: With dead ends: 744 [2020-07-21 01:05:18,184 INFO L226 Difference]: Without dead ends: 506 [2020-07-21 01:05:18,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 01:05:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-07-21 01:05:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-07-21 01:05:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-07-21 01:05:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-07-21 01:05:18,218 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-07-21 01:05:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:18,219 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-07-21 01:05:18,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-07-21 01:05:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:05:18,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:18,223 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] [2020-07-21 01:05:18,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:18,438 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-07-21 01:05:18,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:18,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276428001] [2020-07-21 01:05:18,440 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 01:05:18,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:18,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:18,509 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 01:05:18,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:18,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276428001] [2020-07-21 01:05:18,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:18,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:18,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691847492] [2020-07-21 01:05:18,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:18,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:18,516 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-07-21 01:05:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:18,558 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-07-21 01:05:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:18,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 01:05:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:18,569 INFO L225 Difference]: With dead ends: 908 [2020-07-21 01:05:18,569 INFO L226 Difference]: Without dead ends: 906 [2020-07-21 01:05:18,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 01:05:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-07-21 01:05:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-07-21 01:05:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-07-21 01:05:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-07-21 01:05:18,607 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-07-21 01:05:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:18,608 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-07-21 01:05:18,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-07-21 01:05:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:05:18,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:18,611 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] [2020-07-21 01:05:18,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:18,827 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-07-21 01:05:18,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:18,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895741639] [2020-07-21 01:05:18,830 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 01:05:18,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:18,904 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 01:05:18,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:18,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895741639] [2020-07-21 01:05:18,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:18,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:18,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577942033] [2020-07-21 01:05:18,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:18,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:18,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:18,908 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-07-21 01:05:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:18,947 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-07-21 01:05:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:18,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 01:05:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:18,955 INFO L225 Difference]: With dead ends: 1660 [2020-07-21 01:05:18,956 INFO L226 Difference]: Without dead ends: 970 [2020-07-21 01:05:18,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 01:05:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-21 01:05:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-07-21 01:05:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-07-21 01:05:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-07-21 01:05:19,007 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-07-21 01:05:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:19,007 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-07-21 01:05:19,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-07-21 01:05:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:05:19,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:19,012 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] [2020-07-21 01:05:19,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:19,225 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-07-21 01:05:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:19,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541577436] [2020-07-21 01:05:19,228 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 01:05:19,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:19,310 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 01:05:19,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:19,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541577436] [2020-07-21 01:05:19,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:19,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:19,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134607855] [2020-07-21 01:05:19,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:19,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:19,315 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-07-21 01:05:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:19,366 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-07-21 01:05:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:19,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 01:05:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:19,376 INFO L225 Difference]: With dead ends: 1452 [2020-07-21 01:05:19,377 INFO L226 Difference]: Without dead ends: 986 [2020-07-21 01:05:19,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 01:05:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-07-21 01:05:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-07-21 01:05:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-21 01:05:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-07-21 01:05:19,440 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-07-21 01:05:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:19,440 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-07-21 01:05:19,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-07-21 01:05:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:05:19,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:19,445 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] [2020-07-21 01:05:19,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:19,662 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-07-21 01:05:19,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:19,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573164123] [2020-07-21 01:05:19,664 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 01:05:19,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:19,750 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 01:05:19,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:19,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573164123] [2020-07-21 01:05:19,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:19,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:19,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013841587] [2020-07-21 01:05:19,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:19,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:19,762 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-07-21 01:05:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:19,835 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-07-21 01:05:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:19,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 01:05:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:19,849 INFO L225 Difference]: With dead ends: 1740 [2020-07-21 01:05:19,850 INFO L226 Difference]: Without dead ends: 1738 [2020-07-21 01:05:19,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 01:05:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-21 01:05:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-07-21 01:05:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-07-21 01:05:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-07-21 01:05:19,931 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-07-21 01:05:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:19,932 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-07-21 01:05:19,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-07-21 01:05:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:05:19,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:19,937 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] [2020-07-21 01:05:20,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:20,152 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-07-21 01:05:20,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:20,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867134895] [2020-07-21 01:05:20,154 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 01:05:20,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:20,244 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 01:05:20,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:20,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867134895] [2020-07-21 01:05:20,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:20,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:20,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285155085] [2020-07-21 01:05:20,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:20,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:20,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:20,252 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-07-21 01:05:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:20,336 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-07-21 01:05:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:20,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 01:05:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:20,352 INFO L225 Difference]: With dead ends: 3276 [2020-07-21 01:05:20,353 INFO L226 Difference]: Without dead ends: 1898 [2020-07-21 01:05:20,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 01:05:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-07-21 01:05:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-07-21 01:05:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-07-21 01:05:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-07-21 01:05:20,453 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-07-21 01:05:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:20,453 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-07-21 01:05:20,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-07-21 01:05:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:05:20,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:20,458 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] [2020-07-21 01:05:20,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:20,673 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-07-21 01:05:20,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:20,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057585191] [2020-07-21 01:05:20,675 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 01:05:20,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:20,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:20,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:20,751 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 01:05:20,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:20,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057585191] [2020-07-21 01:05:20,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:20,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:20,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949473465] [2020-07-21 01:05:20,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:20,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:20,755 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-07-21 01:05:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:20,835 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-07-21 01:05:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:20,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 01:05:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:20,853 INFO L225 Difference]: With dead ends: 2844 [2020-07-21 01:05:20,853 INFO L226 Difference]: Without dead ends: 1930 [2020-07-21 01:05:20,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 01:05:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-21 01:05:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-07-21 01:05:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-07-21 01:05:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-07-21 01:05:20,974 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-07-21 01:05:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:20,975 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-07-21 01:05:20,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-07-21 01:05:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:05:20,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:20,981 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] [2020-07-21 01:05:21,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:21,197 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-07-21 01:05:21,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:21,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067996027] [2020-07-21 01:05:21,198 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 01:05:21,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:21,275 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 01:05:21,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:21,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067996027] [2020-07-21 01:05:21,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:21,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:21,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126027817] [2020-07-21 01:05:21,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:21,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:21,279 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-07-21 01:05:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:21,376 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-07-21 01:05:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:21,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 01:05:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:21,404 INFO L225 Difference]: With dead ends: 3340 [2020-07-21 01:05:21,404 INFO L226 Difference]: Without dead ends: 3338 [2020-07-21 01:05:21,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 01:05:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-21 01:05:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-07-21 01:05:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-07-21 01:05:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-07-21 01:05:21,543 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-07-21 01:05:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:21,543 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-07-21 01:05:21,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-07-21 01:05:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:05:21,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:21,550 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] [2020-07-21 01:05:21,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:21,764 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-07-21 01:05:21,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:21,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992353612] [2020-07-21 01:05:21,767 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 01:05:21,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:21,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:21,886 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 01:05:21,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:21,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992353612] [2020-07-21 01:05:21,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:21,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:21,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879369018] [2020-07-21 01:05:21,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:21,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:21,892 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-07-21 01:05:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:22,030 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-07-21 01:05:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:22,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 01:05:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:22,059 INFO L225 Difference]: With dead ends: 6476 [2020-07-21 01:05:22,060 INFO L226 Difference]: Without dead ends: 3722 [2020-07-21 01:05:22,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 01:05:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-21 01:05:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-07-21 01:05:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-21 01:05:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-07-21 01:05:22,257 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-07-21 01:05:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:22,257 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-07-21 01:05:22,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-07-21 01:05:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:05:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:22,270 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] [2020-07-21 01:05:22,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:22,485 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-07-21 01:05:22,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:22,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587218144] [2020-07-21 01:05:22,486 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 01:05:22,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:22,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:22,547 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 01:05:22,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:22,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587218144] [2020-07-21 01:05:22,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:22,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:22,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351452698] [2020-07-21 01:05:22,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:22,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:22,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:22,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:22,551 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-07-21 01:05:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:22,670 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-07-21 01:05:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:22,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 01:05:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:22,699 INFO L225 Difference]: With dead ends: 5580 [2020-07-21 01:05:22,700 INFO L226 Difference]: Without dead ends: 3786 [2020-07-21 01:05:22,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 01:05:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-07-21 01:05:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-07-21 01:05:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-07-21 01:05:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-07-21 01:05:22,874 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-07-21 01:05:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:22,876 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-07-21 01:05:22,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-07-21 01:05:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:05:22,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:22,883 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] [2020-07-21 01:05:23,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:23,097 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-07-21 01:05:23,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:23,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80347461] [2020-07-21 01:05:23,098 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 01:05:23,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:23,146 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 01:05:23,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:23,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80347461] [2020-07-21 01:05:23,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:23,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:23,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95487242] [2020-07-21 01:05:23,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:23,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:23,149 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-07-21 01:05:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:23,300 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-07-21 01:05:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:23,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 01:05:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:23,332 INFO L225 Difference]: With dead ends: 10956 [2020-07-21 01:05:23,332 INFO L226 Difference]: Without dead ends: 7306 [2020-07-21 01:05:23,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 01:05:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-07-21 01:05:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-07-21 01:05:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-21 01:05:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-07-21 01:05:23,553 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-07-21 01:05:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:23,553 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-07-21 01:05:23,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-07-21 01:05:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:05:23,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:23,564 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] [2020-07-21 01:05:23,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:23,778 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-07-21 01:05:23,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:23,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884396682] [2020-07-21 01:05:23,779 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 01:05:23,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:23,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:23,822 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 01:05:23,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:23,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884396682] [2020-07-21 01:05:23,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:23,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:23,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554936164] [2020-07-21 01:05:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:23,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:23,825 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-07-21 01:05:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:23,958 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-07-21 01:05:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:23,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 01:05:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:23,979 INFO L225 Difference]: With dead ends: 8076 [2020-07-21 01:05:23,979 INFO L226 Difference]: Without dead ends: 8074 [2020-07-21 01:05:23,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 01:05:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-21 01:05:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-07-21 01:05:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-21 01:05:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-07-21 01:05:24,380 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-07-21 01:05:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:24,380 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-07-21 01:05:24,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-07-21 01:05:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:05:24,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:24,399 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] [2020-07-21 01:05:24,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:24,612 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-07-21 01:05:24,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:24,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144830172] [2020-07-21 01:05:24,615 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:24,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:24,694 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 01:05:24,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:24,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144830172] [2020-07-21 01:05:24,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:24,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:24,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378137067] [2020-07-21 01:05:24,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:24,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:24,698 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-07-21 01:05:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:25,007 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-07-21 01:05:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:25,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 01:05:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:25,058 INFO L225 Difference]: With dead ends: 12172 [2020-07-21 01:05:25,058 INFO L226 Difference]: Without dead ends: 12170 [2020-07-21 01:05:25,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 01:05:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-07-21 01:05:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-07-21 01:05:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-07-21 01:05:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-07-21 01:05:25,796 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-07-21 01:05:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:25,797 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-07-21 01:05:25,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-07-21 01:05:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:05:25,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:25,834 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] [2020-07-21 01:05:26,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:26,049 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-07-21 01:05:26,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:26,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308038250] [2020-07-21 01:05:26,051 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:26,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:26,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:26,115 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 01:05:26,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:26,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308038250] [2020-07-21 01:05:26,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:26,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:26,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099267097] [2020-07-21 01:05:26,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:26,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:26,117 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-07-21 01:05:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:26,434 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-07-21 01:05:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:26,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 01:05:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:26,486 INFO L225 Difference]: With dead ends: 25228 [2020-07-21 01:05:26,487 INFO L226 Difference]: Without dead ends: 14218 [2020-07-21 01:05:26,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 01:05:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-07-21 01:05:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-07-21 01:05:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-07-21 01:05:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-07-21 01:05:27,265 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-07-21 01:05:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:27,265 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-07-21 01:05:27,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-07-21 01:05:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:05:27,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:27,300 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] [2020-07-21 01:05:27,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:27,514 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-07-21 01:05:27,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:27,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424635644] [2020-07-21 01:05:27,518 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:27,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:27,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:27,577 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 01:05:27,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424635644] [2020-07-21 01:05:27,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:27,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:27,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872278960] [2020-07-21 01:05:27,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:27,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:27,585 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-07-21 01:05:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:27,853 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-07-21 01:05:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:27,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 01:05:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:27,906 INFO L225 Difference]: With dead ends: 21516 [2020-07-21 01:05:27,907 INFO L226 Difference]: Without dead ends: 14602 [2020-07-21 01:05:27,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 01:05:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-07-21 01:05:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-07-21 01:05:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-07-21 01:05:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-07-21 01:05:29,099 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-07-21 01:05:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:29,099 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-07-21 01:05:29,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-07-21 01:05:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:05:29,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:29,126 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] [2020-07-21 01:05:29,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:29,341 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-07-21 01:05:29,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:29,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434204958] [2020-07-21 01:05:29,343 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:29,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:29,401 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 01:05:29,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:29,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434204958] [2020-07-21 01:05:29,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:29,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:29,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006186280] [2020-07-21 01:05:29,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:29,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:29,404 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-07-21 01:05:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:29,738 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-07-21 01:05:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:29,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 01:05:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:29,819 INFO L225 Difference]: With dead ends: 23562 [2020-07-21 01:05:29,819 INFO L226 Difference]: Without dead ends: 23560 [2020-07-21 01:05:29,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 01:05:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-07-21 01:05:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-07-21 01:05:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-07-21 01:05:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-07-21 01:05:30,509 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-07-21 01:05:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:30,509 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-07-21 01:05:30,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-07-21 01:05:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:05:30,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:05:30,560 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] [2020-07-21 01:05:30,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:30,775 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:05:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:05:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-07-21 01:05:30,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:05:30,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236442468] [2020-07-21 01:05:30,776 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:30,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:05:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:05:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:05:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:05:30,859 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 01:05:30,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:05:30,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236442468] [2020-07-21 01:05:30,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:05:30,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:05:30,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586325219] [2020-07-21 01:05:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:05:30,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:05:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:05:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:05:30,863 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-07-21 01:05:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:05:31,451 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-07-21 01:05:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:05:31,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 01:05:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:05:31,453 INFO L225 Difference]: With dead ends: 50184 [2020-07-21 01:05:31,453 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:05:31,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 01:05:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:05:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:05:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:05:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:05:31,588 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-21 01:05:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:05:31,588 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:05:31,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:05:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:05:31,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:05:31,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:05:31,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:05:31,945 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:05:31,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:31,946 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:05:31,946 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:05:31,947 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:05:31,947 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:05:31,948 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-07-21 01:05:31,948 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-07-21 01:05:31,948 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,948 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,948 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,950 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,951 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-07-21 01:05:31,951 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,951 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-07-21 01:05:31,951 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,951 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,952 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,952 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-07-21 01:05:31,952 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-07-21 01:05:31,952 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-07-21 01:05:31,953 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-07-21 01:05:31,953 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-07-21 01:05:31,953 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-21 01:05:31,954 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-07-21 01:05:31,954 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,954 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,954 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-07-21 01:05:31,954 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-21 01:05:31,954 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,955 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,955 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,955 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,955 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-21 01:05:31,956 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-07-21 01:05:31,957 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,957 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 01:05:31,957 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-21 01:05:31,957 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-07-21 01:05:31,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:05:31 BoogieIcfgContainer [2020-07-21 01:05:31,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:05:31,993 INFO L168 Benchmark]: Toolchain (without parser) took 20166.56 ms. Allocated memory was 144.2 MB in the beginning and 627.0 MB in the end (delta: 482.9 MB). Free memory was 100.7 MB in the beginning and 194.8 MB in the end (delta: -94.1 MB). Peak memory consumption was 388.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:31,996 INFO L168 Benchmark]: CDTParser took 1.31 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 01:05:31,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.20 ms. Allocated memory is still 144.2 MB. Free memory was 100.3 MB in the beginning and 89.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:31,998 INFO L168 Benchmark]: Boogie Preprocessor took 204.09 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 89.6 MB in the beginning and 179.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:32,008 INFO L168 Benchmark]: RCFGBuilder took 688.49 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 160.6 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:32,008 INFO L168 Benchmark]: TraceAbstraction took 18830.55 ms. Allocated memory was 201.9 MB in the beginning and 627.0 MB in the end (delta: 425.2 MB). Free memory was 160.0 MB in the beginning and 194.8 MB in the end (delta: -34.8 MB). Peak memory consumption was 390.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:05:32,010 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.31 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 429.20 ms. Allocated memory is still 144.2 MB. Free memory was 100.3 MB in the beginning and 89.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 204.09 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 89.6 MB in the beginning and 179.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 688.49 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 160.6 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18830.55 ms. Allocated memory was 201.9 MB in the beginning and 627.0 MB in the end (delta: 425.2 MB). Free memory was 160.0 MB in the beginning and 194.8 MB in the end (delta: -34.8 MB). Peak memory consumption was 390.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.5s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3125 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...