/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:28:26,829 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:28:26,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:28:26,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:28:26,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:28:26,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:28:26,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:28:26,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:28:26,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:28:26,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:28:26,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:28:26,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:28:26,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:28:26,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:28:26,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:28:26,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:28:26,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:28:26,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:28:26,907 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 01:28:26,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:28:26,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:28:26,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:28:26,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:28:26,922 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:28:26,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:28:26,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:28:26,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:28:26,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:28:26,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:28:26,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:28:26,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:28:26,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:28:26,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:28:26,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:28:26,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:28:26,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:28:26,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:28:26,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:28:26,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:28:26,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:28:26,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:26,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:28:26,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:28:26,927 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 01:28:27,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:28:27,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:28:27,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:28:27,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:28:27,232 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:28:27,233 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label34.c [2020-07-21 01:28:27,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940c3fa7/1c4c7fbea0d44853bb3deeb0bd667467/FLAGf0bc3429a [2020-07-21 01:28:27,825 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:28:27,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label34.c [2020-07-21 01:28:27,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940c3fa7/1c4c7fbea0d44853bb3deeb0bd667467/FLAGf0bc3429a [2020-07-21 01:28:28,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940c3fa7/1c4c7fbea0d44853bb3deeb0bd667467 [2020-07-21 01:28:28,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:28:28,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:28:28,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:28:28,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:28:28,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:28:28,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500d7c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28, skipping insertion in model container [2020-07-21 01:28:28,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:28:28,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:28:28,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:28:28,694 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:28:28,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:28:28,849 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:28:28,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28 WrapperNode [2020-07-21 01:28:28,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:28:28,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:28:28,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:28:28,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:28:28,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... [2020-07-21 01:28:28,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:28:28,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:28:28,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:28:28,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:28:28,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:28:29,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:28:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:28:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 01:28:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:28:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 01:28:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:28:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:28:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:28:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:28:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:28:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:28:30,215 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:28:30,215 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:28:30,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:28:30 BoogieIcfgContainer [2020-07-21 01:28:30,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:28:30,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:28:30,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:28:30,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:28:30,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:28:28" (1/3) ... [2020-07-21 01:28:30,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550806dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:28:30, skipping insertion in model container [2020-07-21 01:28:30,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:28:28" (2/3) ... [2020-07-21 01:28:30,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550806dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:28:30, skipping insertion in model container [2020-07-21 01:28:30,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:28:30" (3/3) ... [2020-07-21 01:28:30,237 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label34.c [2020-07-21 01:28:30,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:28:30,255 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:28:30,268 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:28:30,292 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:28:30,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:28:30,292 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:28:30,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:28:30,293 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:28:30,293 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:28:30,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:28:30,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:28:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 01:28:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 01:28:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:30,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:30,327 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash -864026194, now seen corresponding path program 1 times [2020-07-21 01:28:30,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:30,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549497901] [2020-07-21 01:28:30,342 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 01:28:30,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:28:30,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:28:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:30,548 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 01:28:30,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:28:30,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549497901] [2020-07-21 01:28:30,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:28:30,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:28:30,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836015256] [2020-07-21 01:28:30,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:28:30,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:28:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:28:30,575 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 01:28:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:31,477 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 01:28:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:28:31,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-07-21 01:28:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:31,494 INFO L225 Difference]: With dead ends: 571 [2020-07-21 01:28:31,495 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 01:28:31,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 01:28:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 01:28:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 01:28:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 01:28:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 01:28:31,568 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 69 [2020-07-21 01:28:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:31,569 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 01:28:31,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:28:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 01:28:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-21 01:28:31,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:31,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:28:31,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:31,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1207192086, now seen corresponding path program 1 times [2020-07-21 01:28:31,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:31,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661507636] [2020-07-21 01:28:31,783 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 01:28:31,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:28:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:28:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:28:32,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:28:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:28:32,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661507636] [2020-07-21 01:28:32,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:28:32,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-07-21 01:28:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471130554] [2020-07-21 01:28:32,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:28:32,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:28:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:28:32,123 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 4 states. [2020-07-21 01:28:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:32,868 INFO L93 Difference]: Finished difference Result 586 states and 786 transitions. [2020-07-21 01:28:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:28:32,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-07-21 01:28:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:32,875 INFO L225 Difference]: With dead ends: 586 [2020-07-21 01:28:32,875 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 01:28:32,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:28:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 01:28:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-21 01:28:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 01:28:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 784 transitions. [2020-07-21 01:28:32,919 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 784 transitions. Word has length 139 [2020-07-21 01:28:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:32,920 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 784 transitions. [2020-07-21 01:28:32,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:28:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 784 transitions. [2020-07-21 01:28:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 01:28:32,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:32,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:28:33,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:33,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1954765038, now seen corresponding path program 1 times [2020-07-21 01:28:33,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:33,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144835170] [2020-07-21 01:28:33,143 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 01:28:33,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:28:33,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:28:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:28:33,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:28:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144835170] [2020-07-21 01:28:33,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:28:33,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:28:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226661206] [2020-07-21 01:28:33,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:28:33,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:28:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:28:33,382 INFO L87 Difference]: Start difference. First operand 584 states and 784 transitions. Second operand 5 states. [2020-07-21 01:28:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:34,378 INFO L93 Difference]: Finished difference Result 1472 states and 2014 transitions. [2020-07-21 01:28:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:28:34,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-07-21 01:28:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:34,389 INFO L225 Difference]: With dead ends: 1472 [2020-07-21 01:28:34,389 INFO L226 Difference]: Without dead ends: 894 [2020-07-21 01:28:34,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:28:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-07-21 01:28:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 880. [2020-07-21 01:28:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-07-21 01:28:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1114 transitions. [2020-07-21 01:28:34,450 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1114 transitions. Word has length 191 [2020-07-21 01:28:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:34,450 INFO L479 AbstractCegarLoop]: Abstraction has 880 states and 1114 transitions. [2020-07-21 01:28:34,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:28:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1114 transitions. [2020-07-21 01:28:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-07-21 01:28:34,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:34,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:28:34,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:34,666 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash 975052414, now seen corresponding path program 1 times [2020-07-21 01:28:34,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:34,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969636479] [2020-07-21 01:28:34,669 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 01:28:34,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:28:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:28:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:28:34,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:28:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:28:35,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969636479] [2020-07-21 01:28:35,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:28:35,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:28:35,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70067413] [2020-07-21 01:28:35,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:28:35,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:28:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:28:35,039 INFO L87 Difference]: Start difference. First operand 880 states and 1114 transitions. Second operand 7 states. [2020-07-21 01:28:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:36,359 INFO L93 Difference]: Finished difference Result 2352 states and 3091 transitions. [2020-07-21 01:28:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:28:36,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 221 [2020-07-21 01:28:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:36,368 INFO L225 Difference]: With dead ends: 2352 [2020-07-21 01:28:36,368 INFO L226 Difference]: Without dead ends: 1478 [2020-07-21 01:28:36,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:28:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2020-07-21 01:28:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1474. [2020-07-21 01:28:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2020-07-21 01:28:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1881 transitions. [2020-07-21 01:28:36,418 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1881 transitions. Word has length 221 [2020-07-21 01:28:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:36,419 INFO L479 AbstractCegarLoop]: Abstraction has 1474 states and 1881 transitions. [2020-07-21 01:28:36,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:28:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1881 transitions. [2020-07-21 01:28:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-21 01:28:36,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:36,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:36,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:36,639 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2144724034, now seen corresponding path program 1 times [2020-07-21 01:28:36,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:36,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937285499] [2020-07-21 01:28:36,640 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 01:28:36,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:28:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:28:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-21 01:28:36,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:28:36,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937285499] [2020-07-21 01:28:36,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:28:36,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:28:36,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812012722] [2020-07-21 01:28:36,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:28:36,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:28:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:28:36,821 INFO L87 Difference]: Start difference. First operand 1474 states and 1881 transitions. Second operand 5 states. [2020-07-21 01:28:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:37,691 INFO L93 Difference]: Finished difference Result 3119 states and 3989 transitions. [2020-07-21 01:28:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:28:37,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2020-07-21 01:28:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:37,703 INFO L225 Difference]: With dead ends: 3119 [2020-07-21 01:28:37,703 INFO L226 Difference]: Without dead ends: 1651 [2020-07-21 01:28:37,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:28:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2020-07-21 01:28:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1341. [2020-07-21 01:28:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1341 states. [2020-07-21 01:28:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1714 transitions. [2020-07-21 01:28:37,755 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1714 transitions. Word has length 265 [2020-07-21 01:28:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:37,756 INFO L479 AbstractCegarLoop]: Abstraction has 1341 states and 1714 transitions. [2020-07-21 01:28:37,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:28:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1714 transitions. [2020-07-21 01:28:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 01:28:37,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:37,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:28:37,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:37,981 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:37,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1397062270, now seen corresponding path program 1 times [2020-07-21 01:28:37,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:37,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734836081] [2020-07-21 01:28:37,983 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 01:28:38,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:28:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:38,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:28:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:38,161 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:28:38,162 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:28:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-21 01:28:38,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:28:38,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:38,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:38,375 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 1] term [2020-07-21 01:28:38,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 258 proven. 77 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-07-21 01:28:38,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734836081] [2020-07-21 01:28:38,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:28:38,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 01:28:38,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554462322] [2020-07-21 01:28:38,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:28:38,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:28:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:28:38,578 INFO L87 Difference]: Start difference. First operand 1341 states and 1714 transitions. Second operand 6 states. [2020-07-21 01:28:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:39,660 INFO L93 Difference]: Finished difference Result 2716 states and 3587 transitions. [2020-07-21 01:28:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:28:39,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 335 [2020-07-21 01:28:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:39,668 INFO L225 Difference]: With dead ends: 2716 [2020-07-21 01:28:39,668 INFO L226 Difference]: Without dead ends: 1524 [2020-07-21 01:28:39,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 666 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:28:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2020-07-21 01:28:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1500. [2020-07-21 01:28:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2020-07-21 01:28:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1791 transitions. [2020-07-21 01:28:39,720 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1791 transitions. Word has length 335 [2020-07-21 01:28:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:39,721 INFO L479 AbstractCegarLoop]: Abstraction has 1500 states and 1791 transitions. [2020-07-21 01:28:39,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:28:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1791 transitions. [2020-07-21 01:28:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 01:28:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:39,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:28:39,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:39,944 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -734916411, now seen corresponding path program 1 times [2020-07-21 01:28:39,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:39,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634463405] [2020-07-21 01:28:39,945 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 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 01:28:40,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:28:40,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:28:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-21 01:28:40,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:28:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 265 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 01:28:40,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634463405] [2020-07-21 01:28:40,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:28:40,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:28:40,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795664984] [2020-07-21 01:28:40,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:28:40,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:28:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:28:40,367 INFO L87 Difference]: Start difference. First operand 1500 states and 1791 transitions. Second operand 7 states. [2020-07-21 01:28:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:28:42,166 INFO L93 Difference]: Finished difference Result 4156 states and 5003 transitions. [2020-07-21 01:28:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:28:42,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2020-07-21 01:28:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:28:42,180 INFO L225 Difference]: With dead ends: 4156 [2020-07-21 01:28:42,180 INFO L226 Difference]: Without dead ends: 2207 [2020-07-21 01:28:42,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:28:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-07-21 01:28:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1345. [2020-07-21 01:28:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2020-07-21 01:28:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1533 transitions. [2020-07-21 01:28:42,233 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1533 transitions. Word has length 344 [2020-07-21 01:28:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:28:42,234 INFO L479 AbstractCegarLoop]: Abstraction has 1345 states and 1533 transitions. [2020-07-21 01:28:42,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:28:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1533 transitions. [2020-07-21 01:28:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-07-21 01:28:42,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:28:42,243 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:28:42,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:28:42,456 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:28:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:28:42,456 INFO L82 PathProgramCache]: Analyzing trace with hash 985155661, now seen corresponding path program 1 times [2020-07-21 01:28:42,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:28:42,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683770868] [2020-07-21 01:28:42,458 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 01:28:42,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:28:42,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:28:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:28:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:28:42,619 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:28:42,621 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:28:42,622 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,623 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,626 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,627 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,627 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,630 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,632 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:28:42,634 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:28:42,635 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,636 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:28:42,637 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:28:42,639 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,641 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,642 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,643 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,645 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,647 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,648 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,650 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,652 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:28:42,652 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,653 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,655 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:28:42,657 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:28:56,157 WARN L193 SmtUtils]: Spent 13.43 s on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-07-21 01:28:56,189 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:28:56,298 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:28:56,298 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:28:56,299 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:28:56,342 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:28:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-21 01:28:56,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:28:56,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:28:56,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:28:56,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:28:56,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:28:56,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:28:56,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:28:56,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683770868] [2020-07-21 01:28:56,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:28:56,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 01:28:56,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486352834] [2020-07-21 01:28:56,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:28:56,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:28:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:28:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:28:56,962 INFO L87 Difference]: Start difference. First operand 1345 states and 1533 transitions. Second operand 8 states. [2020-07-21 01:31:56,581 WARN L193 SmtUtils]: Spent 21.91 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 01:32:23,675 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-07-21 01:32:37,471 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-07-21 01:33:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:23,176 INFO L93 Difference]: Finished difference Result 3874 states and 4644 transitions. [2020-07-21 01:33:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:33:23,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 380 [2020-07-21 01:33:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:23,191 INFO L225 Difference]: With dead ends: 3874 [2020-07-21 01:33:23,191 INFO L226 Difference]: Without dead ends: 2678 [2020-07-21 01:33:23,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 629 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-21 01:33:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2020-07-21 01:33:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2664. [2020-07-21 01:33:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-07-21 01:33:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3121 transitions. [2020-07-21 01:33:23,258 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3121 transitions. Word has length 380 [2020-07-21 01:33:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:23,259 INFO L479 AbstractCegarLoop]: Abstraction has 2664 states and 3121 transitions. [2020-07-21 01:33:23,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:33:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3121 transitions. [2020-07-21 01:33:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 01:33:23,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:23,267 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:23,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:23,482 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2048192937, now seen corresponding path program 1 times [2020-07-21 01:33:23,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:23,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854049989] [2020-07-21 01:33:23,484 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 01:33:23,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:23,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:23,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:33:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-07-21 01:33:23,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:33:23,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854049989] [2020-07-21 01:33:23,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:33:23,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:33:23,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103456899] [2020-07-21 01:33:23,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:33:23,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:33:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:33:23,848 INFO L87 Difference]: Start difference. First operand 2664 states and 3121 transitions. Second operand 3 states. [2020-07-21 01:33:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:25,806 INFO L93 Difference]: Finished difference Result 5322 states and 6231 transitions. [2020-07-21 01:33:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:33:25,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 394 [2020-07-21 01:33:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:25,855 INFO L225 Difference]: With dead ends: 5322 [2020-07-21 01:33:25,855 INFO L226 Difference]: Without dead ends: 2662 [2020-07-21 01:33:25,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 392 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 01:33:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2020-07-21 01:33:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2519. [2020-07-21 01:33:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2519 states. [2020-07-21 01:33:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 2915 transitions. [2020-07-21 01:33:25,909 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 2915 transitions. Word has length 394 [2020-07-21 01:33:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:25,909 INFO L479 AbstractCegarLoop]: Abstraction has 2519 states and 2915 transitions. [2020-07-21 01:33:25,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:33:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 2915 transitions. [2020-07-21 01:33:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-07-21 01:33:25,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:25,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:26,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:26,133 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1827375362, now seen corresponding path program 1 times [2020-07-21 01:33:26,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:26,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581287017] [2020-07-21 01:33:26,135 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 01:33:26,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:33:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:26,465 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:26,466 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:33:26,466 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:33:26,474 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:26,476 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:33:26,478 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:26,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:26,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:33:51,554 WARN L193 SmtUtils]: Spent 24.97 s on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-07-21 01:33:51,635 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:55,065 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-07-21 01:33:55,147 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:33:55,147 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:55,148 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:55,228 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:55,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 191 proven. 197 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 01:33:55,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:55,682 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 01:33:55,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:55,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:55,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:55,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:55,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:55,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:56,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:56,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:56,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:56,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:56,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:56,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:33:56,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 7 conjuncts [2020-07-21 01:33:56,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:33:56,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 383 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 01:33:56,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581287017] [2020-07-21 01:33:56,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:56,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-21 01:33:56,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29458810] [2020-07-21 01:33:56,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:33:56,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:56,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:33:56,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-21 01:33:56,941 INFO L87 Difference]: Start difference. First operand 2519 states and 2915 transitions. Second operand 12 states. [2020-07-21 01:34:07,411 WARN L193 SmtUtils]: Spent 8.55 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-07-21 01:37:10,441 WARN L193 SmtUtils]: Spent 12.70 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 01:38:50,933 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-07-21 01:38:59,428 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-07-21 01:39:14,330 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 01:39:44,476 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 01:39:45,196 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-07-21 01:39:46,624 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-07-21 01:39:53,518 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 01:39:53,931 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 01:39:54,843 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 01:39:55,838 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 01:39:56,465 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-07-21 01:39:58,555 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 01:40:08,163 WARN L193 SmtUtils]: Spent 8.49 s on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 01:40:22,785 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 01:40:26,305 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-07-21 01:40:48,488 WARN L193 SmtUtils]: Spent 17.54 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 01:42:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:20,737 INFO L93 Difference]: Finished difference Result 6268 states and 7400 transitions. [2020-07-21 01:42:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-21 01:42:20,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 399 [2020-07-21 01:42:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:20,753 INFO L225 Difference]: With dead ends: 6268 [2020-07-21 01:42:20,753 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:42:20,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 812 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=355, Invalid=1448, Unknown=3, NotChecked=0, Total=1806 [2020-07-21 01:42:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:42:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:42:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:42:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:42:20,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 399 [2020-07-21 01:42:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:20,772 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:42:20,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:42:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:42:20,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:42:20,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:20,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:42:22,037 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 212 [2020-07-21 01:42:22,194 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 212 [2020-07-21 01:42:22,372 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2020-07-21 01:42:22,863 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25