/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:31:03,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:31:03,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:31:03,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:31:03,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:31:03,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:31:03,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:31:03,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:31:03,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:31:03,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:31:03,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:31:03,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:31:03,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:31:03,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:31:03,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:31:03,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:31:03,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:31:03,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:31:03,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:31:03,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:31:03,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:31:03,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:31:03,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:31:03,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:31:03,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:31:03,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:31:03,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:31:03,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:31:03,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:31:03,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:31:03,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:31:03,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:31:03,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:31:03,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:31:03,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:31:03,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:31:03,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:31:03,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:31:03,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:31:03,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:31:03,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:31:03,921 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 01:31:03,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:31:03,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:31:03,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:31:03,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:31:03,961 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:31:03,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:31:03,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:31:03,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:31:03,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:31:03,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:31:03,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:31:03,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:31:03,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:31:03,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:31:03,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:31:03,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:31:03,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:31:03,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:31:03,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:31:03,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:31:03,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:31:03,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:31:03,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:31:03,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:31:03,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:31:03,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:31:03,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:03,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:31:03,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:31:03,971 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 01:31:04,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:31:04,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:31:04,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:31:04,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:31:04,306 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:31:04,307 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label54.c [2020-07-21 01:31:04,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9379bb94a/320ad3a3da54497eb04b9dc1c0cb0458/FLAG46db7226e [2020-07-21 01:31:04,902 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:31:04,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label54.c [2020-07-21 01:31:04,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9379bb94a/320ad3a3da54497eb04b9dc1c0cb0458/FLAG46db7226e [2020-07-21 01:31:05,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9379bb94a/320ad3a3da54497eb04b9dc1c0cb0458 [2020-07-21 01:31:05,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:31:05,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:31:05,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:31:05,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:31:05,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:31:05,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df9bfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05, skipping insertion in model container [2020-07-21 01:31:05,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:31:05,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:31:05,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:31:05,658 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:31:05,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:31:05,907 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:31:05,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05 WrapperNode [2020-07-21 01:31:05,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:31:05,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:31:05,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:31:05,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:31:05,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:05,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (1/1) ... [2020-07-21 01:31:06,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:31:06,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:31:06,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:31:06,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:31:06,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (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 01:31:06,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:31:06,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:31:06,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 01:31:06,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:31:06,082 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 01:31:06,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:31:06,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:31:06,083 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:31:06,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:31:06,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:31:06,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:31:07,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:31:07,305 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:31:07,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:31:07 BoogieIcfgContainer [2020-07-21 01:31:07,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:31:07,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:31:07,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:31:07,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:31:07,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:31:05" (1/3) ... [2020-07-21 01:31:07,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17179a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:31:07, skipping insertion in model container [2020-07-21 01:31:07,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:31:05" (2/3) ... [2020-07-21 01:31:07,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17179a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:31:07, skipping insertion in model container [2020-07-21 01:31:07,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:31:07" (3/3) ... [2020-07-21 01:31:07,320 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label54.c [2020-07-21 01:31:07,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:31:07,338 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:31:07,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:31:07,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:31:07,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:31:07,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:31:07,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:31:07,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:31:07,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:31:07,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:31:07,381 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:31:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 01:31:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 01:31:07,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:07,416 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] [2020-07-21 01:31:07,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 664864703, now seen corresponding path program 1 times [2020-07-21 01:31:07,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:07,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167848149] [2020-07-21 01:31:07,434 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 01:31:07,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:31:07,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:31:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:07,645 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 01:31:07,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:31:07,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167848149] [2020-07-21 01:31:07,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:31:07,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:31:07,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646537047] [2020-07-21 01:31:07,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:31:07,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:31:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:31:07,678 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 01:31:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:08,629 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 01:31:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:31:08,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-07-21 01:31:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:08,664 INFO L225 Difference]: With dead ends: 571 [2020-07-21 01:31:08,664 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 01:31:08,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 01:31:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 01:31:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 01:31:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 01:31:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 01:31:08,792 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 68 [2020-07-21 01:31:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:08,794 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 01:31:08,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:31:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 01:31:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-21 01:31:08,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:08,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:31:09,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:09,021 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:09,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2009427742, now seen corresponding path program 1 times [2020-07-21 01:31:09,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:09,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836395912] [2020-07-21 01:31:09,024 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 01:31:09,129 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:31:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:31:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:31:09,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:31:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:31:09,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836395912] [2020-07-21 01:31:09,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:31:09,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-07-21 01:31:09,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004479434] [2020-07-21 01:31:09,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:31:09,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:09,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:31:09,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:31:09,360 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 4 states. [2020-07-21 01:31:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:10,085 INFO L93 Difference]: Finished difference Result 586 states and 788 transitions. [2020-07-21 01:31:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:31:10,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-07-21 01:31:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:10,091 INFO L225 Difference]: With dead ends: 586 [2020-07-21 01:31:10,092 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 01:31:10,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:31:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 01:31:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-21 01:31:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 01:31:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 786 transitions. [2020-07-21 01:31:10,120 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 786 transitions. Word has length 138 [2020-07-21 01:31:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:10,120 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 786 transitions. [2020-07-21 01:31:10,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:31:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 786 transitions. [2020-07-21 01:31:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-21 01:31:10,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:10,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:31:10,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:10,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash -613948535, now seen corresponding path program 1 times [2020-07-21 01:31:10,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:10,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452546774] [2020-07-21 01:31:10,342 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 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 01:31:10,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:31:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:10,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:31:10,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452546774] [2020-07-21 01:31:10,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:31:10,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:31:10,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574307783] [2020-07-21 01:31:10,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:31:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:31:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:31:10,481 INFO L87 Difference]: Start difference. First operand 584 states and 786 transitions. Second operand 5 states. [2020-07-21 01:31:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:11,377 INFO L93 Difference]: Finished difference Result 1321 states and 1762 transitions. [2020-07-21 01:31:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:31:11,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-07-21 01:31:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:11,382 INFO L225 Difference]: With dead ends: 1321 [2020-07-21 01:31:11,382 INFO L226 Difference]: Without dead ends: 743 [2020-07-21 01:31:11,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 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 01:31:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-07-21 01:31:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 596. [2020-07-21 01:31:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-07-21 01:31:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 794 transitions. [2020-07-21 01:31:11,410 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 794 transitions. Word has length 141 [2020-07-21 01:31:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:11,411 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 794 transitions. [2020-07-21 01:31:11,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:31:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 794 transitions. [2020-07-21 01:31:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 01:31:11,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:11,413 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, 1, 1, 1, 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 01:31:11,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:11,627 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash -628006051, now seen corresponding path program 1 times [2020-07-21 01:31:11,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:11,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353492661] [2020-07-21 01:31:11,630 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 01:31:11,701 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 01:31:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:11,746 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:11,747 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:31:23,877 WARN L193 SmtUtils]: Spent 12.10 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 01:31:23,920 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:31:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:24,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:31:24,173 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 01:31:24,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:24,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:24,247 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:31:24,249 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:31:24,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:24,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:24,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:24,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:29,320 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2020-07-21 01:31:29,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353492661] [2020-07-21 01:31:29,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:31:29,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 01:31:29,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064985517] [2020-07-21 01:31:29,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:31:29,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:31:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:31:29,324 INFO L87 Difference]: Start difference. First operand 596 states and 794 transitions. Second operand 6 states. [2020-07-21 01:31:30,573 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-07-21 01:31:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:36,687 INFO L93 Difference]: Finished difference Result 1539 states and 2219 transitions. [2020-07-21 01:31:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:31:36,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2020-07-21 01:31:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:36,702 INFO L225 Difference]: With dead ends: 1539 [2020-07-21 01:31:36,702 INFO L226 Difference]: Without dead ends: 1065 [2020-07-21 01:31:36,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:31:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-07-21 01:31:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1049. [2020-07-21 01:31:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-07-21 01:31:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1465 transitions. [2020-07-21 01:31:36,759 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1465 transitions. Word has length 147 [2020-07-21 01:31:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:36,759 INFO L479 AbstractCegarLoop]: Abstraction has 1049 states and 1465 transitions. [2020-07-21 01:31:36,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:31:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1465 transitions. [2020-07-21 01:31:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 01:31:36,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:36,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:36,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:36,971 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1103198522, now seen corresponding path program 1 times [2020-07-21 01:31:36,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:36,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810420624] [2020-07-21 01:31:36,974 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 01:31:37,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:37,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:31:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:37,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:31:37,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810420624] [2020-07-21 01:31:37,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:31:37,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:31:37,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371135769] [2020-07-21 01:31:37,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:31:37,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:31:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:31:37,115 INFO L87 Difference]: Start difference. First operand 1049 states and 1465 transitions. Second operand 5 states. [2020-07-21 01:31:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:38,147 INFO L93 Difference]: Finished difference Result 2442 states and 3670 transitions. [2020-07-21 01:31:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:31:38,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-07-21 01:31:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:38,159 INFO L225 Difference]: With dead ends: 2442 [2020-07-21 01:31:38,159 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 01:31:38,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 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 01:31:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 01:31:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1506. [2020-07-21 01:31:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-07-21 01:31:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2009 transitions. [2020-07-21 01:31:38,212 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2009 transitions. Word has length 190 [2020-07-21 01:31:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:38,213 INFO L479 AbstractCegarLoop]: Abstraction has 1506 states and 2009 transitions. [2020-07-21 01:31:38,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:31:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2009 transitions. [2020-07-21 01:31:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-07-21 01:31:38,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:38,217 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:31:38,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:38,432 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash -157046822, now seen corresponding path program 1 times [2020-07-21 01:31:38,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:38,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543235072] [2020-07-21 01:31:38,433 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 01:31:38,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:31:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:38,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:31:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:38,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543235072] [2020-07-21 01:31:38,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:31:38,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:31:38,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065143995] [2020-07-21 01:31:38,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:31:38,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:31:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:31:38,732 INFO L87 Difference]: Start difference. First operand 1506 states and 2009 transitions. Second operand 7 states. [2020-07-21 01:31:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:40,230 INFO L93 Difference]: Finished difference Result 3475 states and 4853 transitions. [2020-07-21 01:31:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:31:40,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-07-21 01:31:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:40,245 INFO L225 Difference]: With dead ends: 3475 [2020-07-21 01:31:40,245 INFO L226 Difference]: Without dead ends: 2118 [2020-07-21 01:31:40,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:31:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2020-07-21 01:31:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2098. [2020-07-21 01:31:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2098 states. [2020-07-21 01:31:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2742 transitions. [2020-07-21 01:31:40,311 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2742 transitions. Word has length 217 [2020-07-21 01:31:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:40,311 INFO L479 AbstractCegarLoop]: Abstraction has 2098 states and 2742 transitions. [2020-07-21 01:31:40,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:31:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2742 transitions. [2020-07-21 01:31:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-21 01:31:40,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:40,316 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, 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] [2020-07-21 01:31:40,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:40,530 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1210831469, now seen corresponding path program 1 times [2020-07-21 01:31:40,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:40,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753924930] [2020-07-21 01:31:40,533 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 01:31:40,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:40,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:40,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:31:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:31:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:31:40,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753924930] [2020-07-21 01:31:40,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:31:40,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:31:40,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011803147] [2020-07-21 01:31:40,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:31:40,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:31:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:31:40,831 INFO L87 Difference]: Start difference. First operand 2098 states and 2742 transitions. Second operand 7 states. [2020-07-21 01:31:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:42,478 INFO L93 Difference]: Finished difference Result 5076 states and 6738 transitions. [2020-07-21 01:31:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:31:42,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-07-21 01:31:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:42,503 INFO L225 Difference]: With dead ends: 5076 [2020-07-21 01:31:42,503 INFO L226 Difference]: Without dead ends: 3127 [2020-07-21 01:31:42,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 435 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 01:31:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2020-07-21 01:31:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 2692. [2020-07-21 01:31:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2692 states. [2020-07-21 01:31:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 3279 transitions. [2020-07-21 01:31:42,631 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 3279 transitions. Word has length 220 [2020-07-21 01:31:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:42,631 INFO L479 AbstractCegarLoop]: Abstraction has 2692 states and 3279 transitions. [2020-07-21 01:31:42,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:31:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 3279 transitions. [2020-07-21 01:31:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 01:31:42,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:42,640 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-07-21 01:31:42,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:42,854 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1723286891, now seen corresponding path program 1 times [2020-07-21 01:31:42,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:42,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917461766] [2020-07-21 01:31:42,855 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 01:31:43,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:31:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:31:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 01:31:43,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:31:43,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917461766] [2020-07-21 01:31:43,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:31:43,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:31:43,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200921272] [2020-07-21 01:31:43,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:31:43,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:31:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:31:43,197 INFO L87 Difference]: Start difference. First operand 2692 states and 3279 transitions. Second operand 3 states. [2020-07-21 01:31:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:31:43,816 INFO L93 Difference]: Finished difference Result 5235 states and 6409 transitions. [2020-07-21 01:31:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:31:43,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 01:31:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:31:43,830 INFO L225 Difference]: With dead ends: 5235 [2020-07-21 01:31:43,830 INFO L226 Difference]: Without dead ends: 2692 [2020-07-21 01:31:43,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 01:31:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2020-07-21 01:31:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2245. [2020-07-21 01:31:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 01:31:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2669 transitions. [2020-07-21 01:31:43,896 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2669 transitions. Word has length 324 [2020-07-21 01:31:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:31:43,897 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 2669 transitions. [2020-07-21 01:31:43,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:31:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2669 transitions. [2020-07-21 01:31:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 01:31:43,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:31:43,907 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:31:44,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:31:44,122 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:31:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:31:44,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1442499553, now seen corresponding path program 1 times [2020-07-21 01:31:44,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:31:44,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373318529] [2020-07-21 01:31:44,124 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 01:31:44,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:31:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:31:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:31:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:31:44,373 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:44,374 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:31:44,375 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:44,378 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:44,379 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:44,380 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:44,383 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:31:44,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:31:56,808 WARN L193 SmtUtils]: Spent 12.39 s on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-07-21 01:31:56,834 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:31:58,933 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:31:58,933 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:58,935 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:58,957 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:58,959 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:31:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 388 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-21 01:31:59,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:31:59,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:59,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:59,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:59,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:31:59,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:31:59,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:31:59,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:59,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:31:59,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:31:59,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:31:59,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:31:59,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373318529] [2020-07-21 01:31:59,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:31:59,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 01:31:59,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377124817] [2020-07-21 01:31:59,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:31:59,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:31:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:31:59,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2020-07-21 01:31:59,465 INFO L87 Difference]: Start difference. First operand 2245 states and 2669 transitions. Second operand 8 states. [2020-07-21 01:32:00,910 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 01:35:51,323 WARN L193 SmtUtils]: Spent 12.49 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-21 01:36:21,559 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-07-21 01:36:35,577 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-07-21 01:37:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:25,610 INFO L93 Difference]: Finished difference Result 5092 states and 6170 transitions. [2020-07-21 01:37:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:37:25,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 379 [2020-07-21 01:37:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:25,628 INFO L225 Difference]: With dead ends: 5092 [2020-07-21 01:37:25,628 INFO L226 Difference]: Without dead ends: 2996 [2020-07-21 01:37:25,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 627 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=136, Invalid=282, Unknown=2, NotChecked=0, Total=420 [2020-07-21 01:37:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-07-21 01:37:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2837. [2020-07-21 01:37:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2837 states. [2020-07-21 01:37:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3329 transitions. [2020-07-21 01:37:25,709 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3329 transitions. Word has length 379 [2020-07-21 01:37:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:25,710 INFO L479 AbstractCegarLoop]: Abstraction has 2837 states and 3329 transitions. [2020-07-21 01:37:25,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:37:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3329 transitions. [2020-07-21 01:37:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-07-21 01:37:25,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:25,723 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:37:25,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:25,939 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1422858386, now seen corresponding path program 1 times [2020-07-21 01:37:25,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:25,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819983287] [2020-07-21 01:37:25,941 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 01:37:26,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:37:26,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:37:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:26,266 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:26,267 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:37:26,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:26,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:26,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,272 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,275 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:37:26,277 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:26,278 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:37:26,284 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,285 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,286 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:26,288 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,289 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,289 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:37:26,295 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:37:26,296 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,297 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:37:26,298 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,299 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:37:26,304 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:37:38,864 WARN L193 SmtUtils]: Spent 12.44 s on a formula simplification. DAG size of input: 105 DAG size of output: 36 [2020-07-21 01:37:38,914 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:43,144 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:37:43,144 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:43,145 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:43,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:43,239 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:37:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 188 proven. 197 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 01:37:43,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:43,828 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 01:37:43,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:43,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:43,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:43,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,522 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 01:37:44,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:44,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:44,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:37:44,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:37:44,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:37:44,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:37:44,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:44,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:37:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 01:37:45,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819983287] [2020-07-21 01:37:45,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:45,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-21 01:37:45,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723975842] [2020-07-21 01:37:45,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:37:45,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:37:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=101, Unknown=2, NotChecked=0, Total=132 [2020-07-21 01:37:45,018 INFO L87 Difference]: Start difference. First operand 2837 states and 3329 transitions. Second operand 12 states. [2020-07-21 01:39:06,995 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-07-21 01:40:36,784 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-07-21 01:41:25,498 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 01:42:51,828 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 01:43:48,403 WARN L193 SmtUtils]: Spent 26.48 s on a formula simplification. DAG size of input: 62 DAG size of output: 60