/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:32:31,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:32:31,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:32:31,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:32:31,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:32:31,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:32:31,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:32:31,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:32:31,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:32:31,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:32:31,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:32:31,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:32:31,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:32:31,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:32:31,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:32:31,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:32:31,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:32:31,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:32:31,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:32:31,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:32:31,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:32:31,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:32:31,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:32:31,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:32:31,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:32:31,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:32:31,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:32:31,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:32:31,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:32:31,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:32:31,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:32:31,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:32:31,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:32:31,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:32:31,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:32:31,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:32:31,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:32:31,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:32:31,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:32:31,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:32:31,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:32:31,787 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 01:32:31,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:32:31,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:32:31,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:32:31,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:32:31,805 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:32:31,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:32:31,806 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:32:31,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:32:31,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:32:31,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:32:31,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:32:31,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:32:31,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:32:31,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:32:31,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:32:31,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:32:31,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:32:31,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:32:31,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:32:31,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:32:31,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:32:31,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:32:31,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:32:31,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:32:31,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:32:31,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:32:31,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:31,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:32:31,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:32:31,811 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 01:32:32,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:32:32,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:32:32,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:32:32,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:32:32,166 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:32:32,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-21 01:32:32,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbcece0f/65265d2ecabb45b3b84c6c8e4c63b122/FLAG5d4c65b31 [2020-07-21 01:32:32,800 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:32:32,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-07-21 01:32:32,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbcece0f/65265d2ecabb45b3b84c6c8e4c63b122/FLAG5d4c65b31 [2020-07-21 01:32:33,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adbcece0f/65265d2ecabb45b3b84c6c8e4c63b122 [2020-07-21 01:32:33,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:32:33,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:32:33,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:32:33,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:32:33,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:32:33,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:32:33" (1/1) ... [2020-07-21 01:32:33,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f44038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:33, skipping insertion in model container [2020-07-21 01:32:33,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:32:33" (1/1) ... [2020-07-21 01:32:33,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:32:33,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:32:33,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:32:33,796 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:32:34,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:32:34,101 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:32:34,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34 WrapperNode [2020-07-21 01:32:34,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:32:34,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:32:34,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:32:34,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:32:34,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (1/1) ... [2020-07-21 01:32:34,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:32:34,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:32:34,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:32:34,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:32:34,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (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 01:32:34,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:32:34,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:32:34,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 01:32:34,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:32:34,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 01:32:34,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:32:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:32:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:32:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:32:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:32:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:32:36,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:32:36,077 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:32:36,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:32:36 BoogieIcfgContainer [2020-07-21 01:32:36,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:32:36,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:32:36,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:32:36,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:32:36,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:32:33" (1/3) ... [2020-07-21 01:32:36,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee6d856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:32:36, skipping insertion in model container [2020-07-21 01:32:36,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:32:34" (2/3) ... [2020-07-21 01:32:36,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee6d856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:32:36, skipping insertion in model container [2020-07-21 01:32:36,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:32:36" (3/3) ... [2020-07-21 01:32:36,104 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-07-21 01:32:36,116 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:32:36,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:32:36,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:32:36,181 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:32:36,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:32:36,182 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:32:36,182 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:32:36,182 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:32:36,182 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:32:36,182 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:32:36,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:32:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-07-21 01:32:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 01:32:36,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:36,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:36,221 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-07-21 01:32:36,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:36,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523461903] [2020-07-21 01:32:36,239 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 01:32:36,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:32:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:32:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:36,475 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 01:32:36,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:36,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523461903] [2020-07-21 01:32:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:36,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:32:36,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828574336] [2020-07-21 01:32:36,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:32:36,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:32:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:36,510 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2020-07-21 01:32:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:37,936 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2020-07-21 01:32:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:32:37,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-07-21 01:32:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:37,978 INFO L225 Difference]: With dead ends: 688 [2020-07-21 01:32:37,979 INFO L226 Difference]: Without dead ends: 372 [2020-07-21 01:32:37,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-07-21 01:32:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2020-07-21 01:32:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-07-21 01:32:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2020-07-21 01:32:38,096 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 47 [2020-07-21 01:32:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:38,097 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2020-07-21 01:32:38,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:32:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2020-07-21 01:32:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-21 01:32:38,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:38,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:38,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:38,308 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash 13726601, now seen corresponding path program 1 times [2020-07-21 01:32:38,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:38,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844279795] [2020-07-21 01:32:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:32:38,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:38,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:32:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:32:38,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:38,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844279795] [2020-07-21 01:32:38,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:38,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:32:38,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725494176] [2020-07-21 01:32:38,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:32:38,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:38,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:32:38,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:32:38,561 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 5 states. [2020-07-21 01:32:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:40,097 INFO L93 Difference]: Finished difference Result 940 states and 1534 transitions. [2020-07-21 01:32:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:32:40,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-07-21 01:32:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:40,105 INFO L225 Difference]: With dead ends: 940 [2020-07-21 01:32:40,106 INFO L226 Difference]: Without dead ends: 574 [2020-07-21 01:32:40,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:32:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-07-21 01:32:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 562. [2020-07-21 01:32:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-07-21 01:32:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 827 transitions. [2020-07-21 01:32:40,149 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 827 transitions. Word has length 116 [2020-07-21 01:32:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:40,150 INFO L479 AbstractCegarLoop]: Abstraction has 562 states and 827 transitions. [2020-07-21 01:32:40,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:32:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 827 transitions. [2020-07-21 01:32:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 01:32:40,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:40,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:40,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:40,367 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1786227410, now seen corresponding path program 1 times [2020-07-21 01:32:40,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:40,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158425544] [2020-07-21 01:32:40,370 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 01:32:40,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:32:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:32:40,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:40,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158425544] [2020-07-21 01:32:40,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:40,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:32:40,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021750201] [2020-07-21 01:32:40,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:32:40,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:32:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:32:40,505 INFO L87 Difference]: Start difference. First operand 562 states and 827 transitions. Second operand 5 states. [2020-07-21 01:32:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:42,046 INFO L93 Difference]: Finished difference Result 1702 states and 2578 transitions. [2020-07-21 01:32:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:32:42,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-07-21 01:32:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:42,058 INFO L225 Difference]: With dead ends: 1702 [2020-07-21 01:32:42,059 INFO L226 Difference]: Without dead ends: 1146 [2020-07-21 01:32:42,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:32:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2020-07-21 01:32:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1128. [2020-07-21 01:32:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2020-07-21 01:32:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1574 transitions. [2020-07-21 01:32:42,120 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1574 transitions. Word has length 117 [2020-07-21 01:32:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:42,120 INFO L479 AbstractCegarLoop]: Abstraction has 1128 states and 1574 transitions. [2020-07-21 01:32:42,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:32:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1574 transitions. [2020-07-21 01:32:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-21 01:32:42,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:42,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:42,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:42,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1793655022, now seen corresponding path program 1 times [2020-07-21 01:32:42,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:42,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794028387] [2020-07-21 01:32:42,340 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 01:32:42,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:32:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:32:42,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:42,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794028387] [2020-07-21 01:32:42,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:42,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:32:42,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468692375] [2020-07-21 01:32:42,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:32:42,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:32:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:32:42,530 INFO L87 Difference]: Start difference. First operand 1128 states and 1574 transitions. Second operand 5 states. [2020-07-21 01:32:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:44,085 INFO L93 Difference]: Finished difference Result 2854 states and 4014 transitions. [2020-07-21 01:32:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:32:44,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2020-07-21 01:32:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:44,106 INFO L225 Difference]: With dead ends: 2854 [2020-07-21 01:32:44,106 INFO L226 Difference]: Without dead ends: 1732 [2020-07-21 01:32:44,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:32:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2020-07-21 01:32:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1690. [2020-07-21 01:32:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-07-21 01:32:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2243 transitions. [2020-07-21 01:32:44,204 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2243 transitions. Word has length 119 [2020-07-21 01:32:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:44,204 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 2243 transitions. [2020-07-21 01:32:44,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:32:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2243 transitions. [2020-07-21 01:32:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-21 01:32:44,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:44,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:44,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:44,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1028566563, now seen corresponding path program 1 times [2020-07-21 01:32:44,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:44,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945659410] [2020-07-21 01:32:44,463 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 01:32:44,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:44,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 01:32:44,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:44,625 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 4, 4, 1] term [2020-07-21 01:32:44,626 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:44,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:44,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:32:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:32:44,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:44,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945659410] [2020-07-21 01:32:44,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:44,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:32:44,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891250446] [2020-07-21 01:32:44,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:32:44,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:32:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:32:44,746 INFO L87 Difference]: Start difference. First operand 1690 states and 2243 transitions. Second operand 6 states. [2020-07-21 01:32:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:46,536 INFO L93 Difference]: Finished difference Result 3702 states and 4936 transitions. [2020-07-21 01:32:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:32:46,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2020-07-21 01:32:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:46,550 INFO L225 Difference]: With dead ends: 3702 [2020-07-21 01:32:46,550 INFO L226 Difference]: Without dead ends: 2200 [2020-07-21 01:32:46,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:32:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2020-07-21 01:32:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1888. [2020-07-21 01:32:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1888 states. [2020-07-21 01:32:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2467 transitions. [2020-07-21 01:32:46,618 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2467 transitions. Word has length 142 [2020-07-21 01:32:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:46,619 INFO L479 AbstractCegarLoop]: Abstraction has 1888 states and 2467 transitions. [2020-07-21 01:32:46,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:32:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2467 transitions. [2020-07-21 01:32:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-07-21 01:32:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:46,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:46,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:46,838 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 189690810, now seen corresponding path program 1 times [2020-07-21 01:32:46,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:46,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165919295] [2020-07-21 01:32:46,840 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 01:32:46,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:32:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:47,007 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:32:47,008 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:47,009 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:47,028 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:32:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-21 01:32:47,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:47,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165919295] [2020-07-21 01:32:47,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:47,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:32:47,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915191390] [2020-07-21 01:32:47,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:32:47,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:32:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:32:47,169 INFO L87 Difference]: Start difference. First operand 1888 states and 2467 transitions. Second operand 5 states. [2020-07-21 01:32:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:48,650 INFO L93 Difference]: Finished difference Result 3804 states and 5006 transitions. [2020-07-21 01:32:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:32:48,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-07-21 01:32:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:48,666 INFO L225 Difference]: With dead ends: 3804 [2020-07-21 01:32:48,667 INFO L226 Difference]: Without dead ends: 1922 [2020-07-21 01:32:48,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:32:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2020-07-21 01:32:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1884. [2020-07-21 01:32:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-07-21 01:32:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2429 transitions. [2020-07-21 01:32:48,735 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2429 transitions. Word has length 253 [2020-07-21 01:32:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:48,736 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2429 transitions. [2020-07-21 01:32:48,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:32:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2429 transitions. [2020-07-21 01:32:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 01:32:48,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:48,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:48,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:48,957 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -845755818, now seen corresponding path program 1 times [2020-07-21 01:32:48,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:48,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880197462] [2020-07-21 01:32:48,959 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 01:32:49,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:32:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:32:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-07-21 01:32:49,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:49,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880197462] [2020-07-21 01:32:49,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:49,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:32:49,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553303640] [2020-07-21 01:32:49,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:32:49,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:32:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:49,235 INFO L87 Difference]: Start difference. First operand 1884 states and 2429 transitions. Second operand 3 states. [2020-07-21 01:32:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:50,172 INFO L93 Difference]: Finished difference Result 4498 states and 5783 transitions. [2020-07-21 01:32:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:32:50,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 01:32:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:50,185 INFO L225 Difference]: With dead ends: 4498 [2020-07-21 01:32:50,185 INFO L226 Difference]: Without dead ends: 2244 [2020-07-21 01:32:50,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2020-07-21 01:32:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1692. [2020-07-21 01:32:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1692 states. [2020-07-21 01:32:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2016 transitions. [2020-07-21 01:32:50,244 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2016 transitions. Word has length 339 [2020-07-21 01:32:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:50,246 INFO L479 AbstractCegarLoop]: Abstraction has 1692 states and 2016 transitions. [2020-07-21 01:32:50,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:32:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2016 transitions. [2020-07-21 01:32:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-07-21 01:32:50,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:50,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:50,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:50,468 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash 779395490, now seen corresponding path program 1 times [2020-07-21 01:32:50,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:50,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003515847] [2020-07-21 01:32:50,470 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 01:32:50,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:32:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:32:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-21 01:32:50,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:32:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003515847] [2020-07-21 01:32:50,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:32:50,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:32:50,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598087809] [2020-07-21 01:32:50,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:32:50,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:32:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:50,784 INFO L87 Difference]: Start difference. First operand 1692 states and 2016 transitions. Second operand 3 states. [2020-07-21 01:32:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:51,579 INFO L93 Difference]: Finished difference Result 2064 states and 2468 transitions. [2020-07-21 01:32:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:32:51,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-07-21 01:32:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:51,594 INFO L225 Difference]: With dead ends: 2064 [2020-07-21 01:32:51,596 INFO L226 Difference]: Without dead ends: 2062 [2020-07-21 01:32:51,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:32:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-07-21 01:32:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1696. [2020-07-21 01:32:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2020-07-21 01:32:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2004 transitions. [2020-07-21 01:32:51,647 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2004 transitions. Word has length 361 [2020-07-21 01:32:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:51,649 INFO L479 AbstractCegarLoop]: Abstraction has 1696 states and 2004 transitions. [2020-07-21 01:32:51,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:32:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2004 transitions. [2020-07-21 01:32:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 01:32:51,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:51,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:51,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:51,867 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1203933665, now seen corresponding path program 1 times [2020-07-21 01:32:51,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:51,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526067608] [2020-07-21 01:32:51,870 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 01:32:52,105 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:32:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 561 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 01:32:52,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:32:52,562 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 01:32:52,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:52,565 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 01:32:52,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:52,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:52,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-07-21 01:32:52,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526067608] [2020-07-21 01:32:52,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:32:52,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:32:52,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642117042] [2020-07-21 01:32:52,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:32:52,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:32:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:32:52,919 INFO L87 Difference]: Start difference. First operand 1696 states and 2004 transitions. Second operand 7 states. [2020-07-21 01:32:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:54,568 INFO L93 Difference]: Finished difference Result 4874 states and 5858 transitions. [2020-07-21 01:32:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:32:54,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 452 [2020-07-21 01:32:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:54,583 INFO L225 Difference]: With dead ends: 4874 [2020-07-21 01:32:54,583 INFO L226 Difference]: Without dead ends: 2814 [2020-07-21 01:32:54,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:32:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-21 01:32:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2260. [2020-07-21 01:32:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2260 states. [2020-07-21 01:32:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2704 transitions. [2020-07-21 01:32:54,650 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2704 transitions. Word has length 452 [2020-07-21 01:32:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:54,651 INFO L479 AbstractCegarLoop]: Abstraction has 2260 states and 2704 transitions. [2020-07-21 01:32:54,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:32:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2704 transitions. [2020-07-21 01:32:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2020-07-21 01:32:54,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:54,681 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:54,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:54,888 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1066963527, now seen corresponding path program 1 times [2020-07-21 01:32:54,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:54,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596483128] [2020-07-21 01:32:54,897 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 01:32:55,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:55,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 01:32:55,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:55,527 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-21 01:32:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 816 proven. 137 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-07-21 01:32:56,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:32:56,360 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:32:56,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:56,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:32:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 519 proven. 403 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-07-21 01:32:57,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596483128] [2020-07-21 01:32:57,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:32:57,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 01:32:57,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307376498] [2020-07-21 01:32:57,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:32:57,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:32:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:32:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:32:57,034 INFO L87 Difference]: Start difference. First operand 2260 states and 2704 transitions. Second operand 11 states. [2020-07-21 01:32:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:32:58,829 INFO L93 Difference]: Finished difference Result 4800 states and 5893 transitions. [2020-07-21 01:32:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:32:58,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 536 [2020-07-21 01:32:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:32:58,842 INFO L225 Difference]: With dead ends: 4800 [2020-07-21 01:32:58,843 INFO L226 Difference]: Without dead ends: 2505 [2020-07-21 01:32:58,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 1066 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-07-21 01:32:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2020-07-21 01:32:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2448. [2020-07-21 01:32:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2448 states. [2020-07-21 01:32:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 2786 transitions. [2020-07-21 01:32:58,921 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 2786 transitions. Word has length 536 [2020-07-21 01:32:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:32:58,922 INFO L479 AbstractCegarLoop]: Abstraction has 2448 states and 2786 transitions. [2020-07-21 01:32:58,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:32:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 2786 transitions. [2020-07-21 01:32:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-07-21 01:32:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:32:58,933 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:32:59,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:59,147 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:32:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:32:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1282643571, now seen corresponding path program 2 times [2020-07-21 01:32:59,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:32:59,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546975995] [2020-07-21 01:32:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:32:59,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:32:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:32:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 01:32:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:32:59,754 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2020-07-21 01:33:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 671 proven. 220 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-21 01:33:00,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:00,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 436 proven. 182 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-21 01:33:00,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546975995] [2020-07-21 01:33:00,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:00,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-07-21 01:33:00,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132529378] [2020-07-21 01:33:00,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:33:00,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:33:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:33:00,725 INFO L87 Difference]: Start difference. First operand 2448 states and 2786 transitions. Second operand 11 states. [2020-07-21 01:33:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:03,265 INFO L93 Difference]: Finished difference Result 7658 states and 8897 transitions. [2020-07-21 01:33:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 01:33:03,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 562 [2020-07-21 01:33:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:03,288 INFO L225 Difference]: With dead ends: 7658 [2020-07-21 01:33:03,289 INFO L226 Difference]: Without dead ends: 5216 [2020-07-21 01:33:03,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1117 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:33:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2020-07-21 01:33:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 4846. [2020-07-21 01:33:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4846 states. [2020-07-21 01:33:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 5655 transitions. [2020-07-21 01:33:03,419 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 5655 transitions. Word has length 562 [2020-07-21 01:33:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:03,420 INFO L479 AbstractCegarLoop]: Abstraction has 4846 states and 5655 transitions. [2020-07-21 01:33:03,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:33:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 5655 transitions. [2020-07-21 01:33:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2020-07-21 01:33:03,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:03,431 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:03,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:03,637 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:03,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1935935179, now seen corresponding path program 1 times [2020-07-21 01:33:03,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:03,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723348024] [2020-07-21 01:33:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:04,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:33:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 01:33:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:04,304 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-07-21 01:33:04,457 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 01:33:04,458 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:04,459 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 01:33:04,460 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 01:33:04,461 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:33:04,462 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-21 01:33:04,463 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 01:33:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 673 proven. 220 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-21 01:33:04,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:05,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:05,171 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 01:33:05,172 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 01:33:05,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:05,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:05,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:05,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:05,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:05,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:05,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:05,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 436 proven. 184 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-07-21 01:33:06,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723348024] [2020-07-21 01:33:06,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:06,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2020-07-21 01:33:06,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788507217] [2020-07-21 01:33:06,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 01:33:06,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:06,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 01:33:06,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-07-21 01:33:06,706 INFO L87 Difference]: Start difference. First operand 4846 states and 5655 transitions. Second operand 13 states. [2020-07-21 01:33:09,565 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-07-21 01:33:10,458 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-07-21 01:33:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:11,036 INFO L93 Difference]: Finished difference Result 10252 states and 12150 transitions. [2020-07-21 01:33:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 01:33:11,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 614 [2020-07-21 01:33:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:11,074 INFO L225 Difference]: With dead ends: 10252 [2020-07-21 01:33:11,075 INFO L226 Difference]: Without dead ends: 5962 [2020-07-21 01:33:11,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1224 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-07-21 01:33:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2020-07-21 01:33:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5762. [2020-07-21 01:33:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5762 states. [2020-07-21 01:33:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 6727 transitions. [2020-07-21 01:33:11,229 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 6727 transitions. Word has length 614 [2020-07-21 01:33:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:11,230 INFO L479 AbstractCegarLoop]: Abstraction has 5762 states and 6727 transitions. [2020-07-21 01:33:11,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 01:33:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 6727 transitions. [2020-07-21 01:33:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-07-21 01:33:11,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:11,241 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:11,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:11,455 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:11,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 629641869, now seen corresponding path program 1 times [2020-07-21 01:33:11,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:11,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397515782] [2020-07-21 01:33:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:11,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:33:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-07-21 01:33:11,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 552 proven. 74 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-07-21 01:33:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397515782] [2020-07-21 01:33:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:12,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:33:12,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230905034] [2020-07-21 01:33:12,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:33:12,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:33:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:33:12,340 INFO L87 Difference]: Start difference. First operand 5762 states and 6727 transitions. Second operand 7 states. [2020-07-21 01:33:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:13,976 INFO L93 Difference]: Finished difference Result 12252 states and 14350 transitions. [2020-07-21 01:33:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:33:13,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 636 [2020-07-21 01:33:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:13,997 INFO L225 Difference]: With dead ends: 12252 [2020-07-21 01:33:13,998 INFO L226 Difference]: Without dead ends: 7046 [2020-07-21 01:33:14,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1279 GetRequests, 1269 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:33:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2020-07-21 01:33:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 6500. [2020-07-21 01:33:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2020-07-21 01:33:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 7312 transitions. [2020-07-21 01:33:14,152 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 7312 transitions. Word has length 636 [2020-07-21 01:33:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:14,152 INFO L479 AbstractCegarLoop]: Abstraction has 6500 states and 7312 transitions. [2020-07-21 01:33:14,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:33:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 7312 transitions. [2020-07-21 01:33:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-21 01:33:14,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:14,164 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:14,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:14,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1261042937, now seen corresponding path program 1 times [2020-07-21 01:33:14,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:14,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662101270] [2020-07-21 01:33:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:14,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:14,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 01:33:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:14,783 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-07-21 01:33:14,783 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 988 proven. 2 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2020-07-21 01:33:15,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:15,416 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 01:33:15,455 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 1] term [2020-07-21 01:33:15,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:15,455 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 01:33:15,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:15,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:15,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:15,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:15,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 675 proven. 74 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-07-21 01:33:16,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662101270] [2020-07-21 01:33:16,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:16,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:33:16,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280914647] [2020-07-21 01:33:16,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:33:16,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:33:16,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:33:16,281 INFO L87 Difference]: Start difference. First operand 6500 states and 7312 transitions. Second operand 7 states. [2020-07-21 01:33:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:18,332 INFO L93 Difference]: Finished difference Result 13366 states and 15097 transitions. [2020-07-21 01:33:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:33:18,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 650 [2020-07-21 01:33:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:18,352 INFO L225 Difference]: With dead ends: 13366 [2020-07-21 01:33:18,352 INFO L226 Difference]: Without dead ends: 6866 [2020-07-21 01:33:18,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:33:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2020-07-21 01:33:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6678. [2020-07-21 01:33:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6678 states. [2020-07-21 01:33:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 7362 transitions. [2020-07-21 01:33:18,513 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 7362 transitions. Word has length 650 [2020-07-21 01:33:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:18,514 INFO L479 AbstractCegarLoop]: Abstraction has 6678 states and 7362 transitions. [2020-07-21 01:33:18,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:33:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 7362 transitions. [2020-07-21 01:33:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2020-07-21 01:33:18,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:18,528 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:18,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:18,742 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1287824626, now seen corresponding path program 1 times [2020-07-21 01:33:18,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:18,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430069009] [2020-07-21 01:33:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:19,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:33:19,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:33:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:19,115 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:33:19,115 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:19,116 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:19,143 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 1587 proven. 6 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-07-21 01:33:19,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:19,615 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 01:33:19,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:19,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:19,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:19,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:19,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 776 proven. 366 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2020-07-21 01:33:20,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430069009] [2020-07-21 01:33:20,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:20,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 01:33:20,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641068593] [2020-07-21 01:33:20,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 01:33:20,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 01:33:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-21 01:33:20,363 INFO L87 Difference]: Start difference. First operand 6678 states and 7362 transitions. Second operand 13 states. [2020-07-21 01:33:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:24,806 INFO L93 Difference]: Finished difference Result 13194 states and 14646 transitions. [2020-07-21 01:33:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 01:33:24,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 723 [2020-07-21 01:33:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:24,841 INFO L225 Difference]: With dead ends: 13194 [2020-07-21 01:33:24,842 INFO L226 Difference]: Without dead ends: 7072 [2020-07-21 01:33:24,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1481 GetRequests, 1450 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-07-21 01:33:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2020-07-21 01:33:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6496. [2020-07-21 01:33:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6496 states. [2020-07-21 01:33:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 7078 transitions. [2020-07-21 01:33:25,062 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 7078 transitions. Word has length 723 [2020-07-21 01:33:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:25,063 INFO L479 AbstractCegarLoop]: Abstraction has 6496 states and 7078 transitions. [2020-07-21 01:33:25,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 01:33:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 7078 transitions. [2020-07-21 01:33:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 01:33:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:25,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:25,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:25,298 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1556654866, now seen corresponding path program 1 times [2020-07-21 01:33:25,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:25,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818585037] [2020-07-21 01:33:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:25,761 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:33:25,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:33:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 1450 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2020-07-21 01:33:26,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 623 proven. 148 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2020-07-21 01:33:26,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818585037] [2020-07-21 01:33:26,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:26,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 01:33:26,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786084931] [2020-07-21 01:33:26,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:33:26,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:33:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:33:26,663 INFO L87 Difference]: Start difference. First operand 6496 states and 7078 transitions. Second operand 6 states. [2020-07-21 01:33:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:27,842 INFO L93 Difference]: Finished difference Result 12988 states and 14252 transitions. [2020-07-21 01:33:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:33:27,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 871 [2020-07-21 01:33:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:27,866 INFO L225 Difference]: With dead ends: 12988 [2020-07-21 01:33:27,866 INFO L226 Difference]: Without dead ends: 7048 [2020-07-21 01:33:27,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1747 GetRequests, 1738 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:33:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2020-07-21 01:33:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 7048. [2020-07-21 01:33:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-07-21 01:33:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 7638 transitions. [2020-07-21 01:33:28,012 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 7638 transitions. Word has length 871 [2020-07-21 01:33:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:28,013 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 7638 transitions. [2020-07-21 01:33:28,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:33:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 7638 transitions. [2020-07-21 01:33:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2020-07-21 01:33:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:28,031 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:28,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:28,239 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1319533531, now seen corresponding path program 1 times [2020-07-21 01:33:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:28,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006027305] [2020-07-21 01:33:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:28,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:28,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:33:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 854 proven. 2 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2020-07-21 01:33:29,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:29,317 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 01:33:29,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:29,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 854 proven. 2 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2020-07-21 01:33:30,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006027305] [2020-07-21 01:33:30,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:30,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:33:30,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394875748] [2020-07-21 01:33:30,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:33:30,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:30,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:33:30,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:33:30,137 INFO L87 Difference]: Start difference. First operand 7048 states and 7638 transitions. Second operand 7 states. [2020-07-21 01:33:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:31,875 INFO L93 Difference]: Finished difference Result 13542 states and 14717 transitions. [2020-07-21 01:33:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:33:31,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 970 [2020-07-21 01:33:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:31,897 INFO L225 Difference]: With dead ends: 13542 [2020-07-21 01:33:31,897 INFO L226 Difference]: Without dead ends: 7050 [2020-07-21 01:33:31,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1949 GetRequests, 1939 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:33:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-07-21 01:33:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 7048. [2020-07-21 01:33:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-07-21 01:33:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 7595 transitions. [2020-07-21 01:33:32,042 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 7595 transitions. Word has length 970 [2020-07-21 01:33:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:32,043 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 7595 transitions. [2020-07-21 01:33:32,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:33:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 7595 transitions. [2020-07-21 01:33:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2020-07-21 01:33:32,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:32,071 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:32,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:32,285 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -795352435, now seen corresponding path program 1 times [2020-07-21 01:33:32,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:32,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272822680] [2020-07-21 01:33:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:32,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:32,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 01:33:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:32,765 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-07-21 01:33:32,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 1684 proven. 2 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2020-07-21 01:33:33,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:33,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:33,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:33,432 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 2, 1] term [2020-07-21 01:33:33,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:33,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:33,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:33,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 735 proven. 144 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2020-07-21 01:33:34,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272822680] [2020-07-21 01:33:34,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:34,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:33:34,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737091929] [2020-07-21 01:33:34,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:33:34,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:33:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:33:34,323 INFO L87 Difference]: Start difference. First operand 7048 states and 7595 transitions. Second operand 7 states. [2020-07-21 01:33:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:36,499 INFO L93 Difference]: Finished difference Result 13916 states and 15085 transitions. [2020-07-21 01:33:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:33:36,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 974 [2020-07-21 01:33:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:36,523 INFO L225 Difference]: With dead ends: 13916 [2020-07-21 01:33:36,524 INFO L226 Difference]: Without dead ends: 7424 [2020-07-21 01:33:36,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1955 GetRequests, 1945 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:33:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7424 states. [2020-07-21 01:33:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7424 to 7228. [2020-07-21 01:33:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7228 states. [2020-07-21 01:33:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 7745 transitions. [2020-07-21 01:33:36,686 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 7745 transitions. Word has length 974 [2020-07-21 01:33:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:36,687 INFO L479 AbstractCegarLoop]: Abstraction has 7228 states and 7745 transitions. [2020-07-21 01:33:36,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:33:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 7745 transitions. [2020-07-21 01:33:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2020-07-21 01:33:36,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:36,709 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:36,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:36,924 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash -846687554, now seen corresponding path program 1 times [2020-07-21 01:33:36,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:36,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79593775] [2020-07-21 01:33:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:37,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:37,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:33:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:37,545 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 01:33:37,545 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:37,546 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 4, 1] term [2020-07-21 01:33:37,546 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:37,564 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3636 backedges. 2236 proven. 6 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2020-07-21 01:33:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:38,393 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 01:33:38,442 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 2, 1] term [2020-07-21 01:33:38,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:38,443 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 1] term [2020-07-21 01:33:38,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:38,443 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-07-21 01:33:38,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,444 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 2, 2, 2, 1] term [2020-07-21 01:33:38,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,446 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 2, 1] term [2020-07-21 01:33:38,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:38,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:38,471 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:33:38,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:38,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:38,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3636 backedges. 1603 proven. 258 refuted. 0 times theorem prover too weak. 1775 trivial. 0 not checked. [2020-07-21 01:33:39,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79593775] [2020-07-21 01:33:39,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:39,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 01:33:39,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147160938] [2020-07-21 01:33:39,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:33:39,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:33:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:33:39,903 INFO L87 Difference]: Start difference. First operand 7228 states and 7745 transitions. Second operand 12 states. [2020-07-21 01:33:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:43,273 INFO L93 Difference]: Finished difference Result 13856 states and 15182 transitions. [2020-07-21 01:33:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 01:33:43,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1017 [2020-07-21 01:33:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:43,293 INFO L225 Difference]: With dead ends: 13856 [2020-07-21 01:33:43,293 INFO L226 Difference]: Without dead ends: 6804 [2020-07-21 01:33:43,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2055 GetRequests, 2031 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:33:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2020-07-21 01:33:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 6488. [2020-07-21 01:33:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6488 states. [2020-07-21 01:33:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6488 states to 6488 states and 6881 transitions. [2020-07-21 01:33:43,454 INFO L78 Accepts]: Start accepts. Automaton has 6488 states and 6881 transitions. Word has length 1017 [2020-07-21 01:33:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:43,455 INFO L479 AbstractCegarLoop]: Abstraction has 6488 states and 6881 transitions. [2020-07-21 01:33:43,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:33:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6488 states and 6881 transitions. [2020-07-21 01:33:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2020-07-21 01:33:43,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:43,474 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:43,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:43,688 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -770795566, now seen corresponding path program 1 times [2020-07-21 01:33:43,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:43,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768941040] [2020-07-21 01:33:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:44,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:44,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:44,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:33:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:44,112 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 3, 1] term [2020-07-21 01:33:44,113 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:33:44,113 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 01:33:44,137 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:33:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 971 proven. 2 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2020-07-21 01:33:44,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:44,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:44,756 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:33:44,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:44,757 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 01:33:44,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:44,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:44,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:44,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 971 proven. 2 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2020-07-21 01:33:45,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768941040] [2020-07-21 01:33:45,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:45,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 01:33:45,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072896687] [2020-07-21 01:33:45,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:33:45,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:33:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:33:45,839 INFO L87 Difference]: Start difference. First operand 6488 states and 6881 transitions. Second operand 7 states. [2020-07-21 01:33:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:48,215 INFO L93 Difference]: Finished difference Result 12236 states and 13017 transitions. [2020-07-21 01:33:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:33:48,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1049 [2020-07-21 01:33:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:48,230 INFO L225 Difference]: With dead ends: 12236 [2020-07-21 01:33:48,230 INFO L226 Difference]: Without dead ends: 6116 [2020-07-21 01:33:48,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2107 GetRequests, 2096 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:33:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2020-07-21 01:33:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5750. [2020-07-21 01:33:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5750 states. [2020-07-21 01:33:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 5965 transitions. [2020-07-21 01:33:48,339 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 5965 transitions. Word has length 1049 [2020-07-21 01:33:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:48,340 INFO L479 AbstractCegarLoop]: Abstraction has 5750 states and 5965 transitions. [2020-07-21 01:33:48,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:33:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 5965 transitions. [2020-07-21 01:33:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1098 [2020-07-21 01:33:48,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:48,360 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:48,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:48,576 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1467967182, now seen corresponding path program 1 times [2020-07-21 01:33:48,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:48,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045257924] [2020-07-21 01:33:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:48,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:33:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:49,000 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:33:49,001 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3737 backedges. 2216 proven. 6 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2020-07-21 01:33:49,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:33:49,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:49,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:49,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:50,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:33:50,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:33:50,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:33:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3737 backedges. 1693 proven. 269 refuted. 0 times theorem prover too weak. 1775 trivial. 0 not checked. [2020-07-21 01:33:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045257924] [2020-07-21 01:33:50,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:33:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-07-21 01:33:50,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627337323] [2020-07-21 01:33:50,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:33:50,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:33:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:33:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:33:50,836 INFO L87 Difference]: Start difference. First operand 5750 states and 5965 transitions. Second operand 12 states. [2020-07-21 01:33:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:33:55,732 INFO L93 Difference]: Finished difference Result 11496 states and 11964 transitions. [2020-07-21 01:33:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 01:33:55,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1097 [2020-07-21 01:33:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:33:55,749 INFO L225 Difference]: With dead ends: 11496 [2020-07-21 01:33:55,750 INFO L226 Difference]: Without dead ends: 6302 [2020-07-21 01:33:55,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2215 GetRequests, 2193 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2020-07-21 01:33:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2020-07-21 01:33:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6300. [2020-07-21 01:33:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2020-07-21 01:33:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 6491 transitions. [2020-07-21 01:33:55,838 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 6491 transitions. Word has length 1097 [2020-07-21 01:33:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:33:55,839 INFO L479 AbstractCegarLoop]: Abstraction has 6300 states and 6491 transitions. [2020-07-21 01:33:55,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:33:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 6491 transitions. [2020-07-21 01:33:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1515 [2020-07-21 01:33:55,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:33:55,859 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:33:56,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:56,060 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:33:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:33:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1398103861, now seen corresponding path program 1 times [2020-07-21 01:33:56,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:33:56,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702333052] [2020-07-21 01:33:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:33:56,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:33:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:33:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:33:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:33:56,661 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:33:56,662 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:33:56,662 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,663 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 01:33:56,664 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,665 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,665 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,667 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,668 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 01:33:56,670 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:33:56,670 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,671 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-07-21 01:33:56,672 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,672 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,674 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:33:56,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,676 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,677 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,680 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,680 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,682 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 01:33:56,683 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,684 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:33:56,685 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-21 01:34:15,495 WARN L193 SmtUtils]: Spent 16.66 s on a formula simplification. DAG size of input: 104 DAG size of output: 51 [2020-07-21 01:34:17,583 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-21 01:34:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6489 backedges. 1708 proven. 43 refuted. 0 times theorem prover too weak. 4738 trivial. 0 not checked. [2020-07-21 01:34:21,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:34:21,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:34:21,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:34:21,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:34:21,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:34:21,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 01:34:21,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:34:21,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:34:21,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:34:21,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:34:21,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 01:34:21,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 01:34:35,935 WARN L193 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-07-21 01:34:35,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702333052] [2020-07-21 01:34:35,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:34:35,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 01:34:35,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287110807] [2020-07-21 01:34:35,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:34:35,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:34:35,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:34:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-21 01:34:35,942 INFO L87 Difference]: Start difference. First operand 6300 states and 6491 transitions. Second operand 6 states. [2020-07-21 01:40:12,280 WARN L193 SmtUtils]: Spent 12.47 s on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-07-21 01:40:19,118 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-07-21 01:41:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:49,883 INFO L93 Difference]: Finished difference Result 13340 states and 13773 transitions. [2020-07-21 01:41:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:41:49,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1514 [2020-07-21 01:41:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:49,913 INFO L225 Difference]: With dead ends: 13340 [2020-07-21 01:41:49,913 INFO L226 Difference]: Without dead ends: 7226 [2020-07-21 01:41:49,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1562 GetRequests, 1552 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=32, Invalid=74, Unknown=4, NotChecked=0, Total=110 [2020-07-21 01:41:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2020-07-21 01:41:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6860. [2020-07-21 01:41:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6860 states. [2020-07-21 01:41:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6860 states to 6860 states and 7068 transitions. [2020-07-21 01:41:50,025 INFO L78 Accepts]: Start accepts. Automaton has 6860 states and 7068 transitions. Word has length 1514 [2020-07-21 01:41:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:50,026 INFO L479 AbstractCegarLoop]: Abstraction has 6860 states and 7068 transitions. [2020-07-21 01:41:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:41:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6860 states and 7068 transitions. [2020-07-21 01:41:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2020-07-21 01:41:50,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:50,056 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:50,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:50,262 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:50,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1464304767, now seen corresponding path program 1 times [2020-07-21 01:41:50,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:50,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813700924] [2020-07-21 01:41:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:50,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2251 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:41:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:51,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:41:51,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:41:53,311 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-07-21 01:41:55,433 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:41:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8459 backedges. 2514 proven. 88 refuted. 0 times theorem prover too weak. 5857 trivial. 0 not checked. [2020-07-21 01:41:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:41:59,143 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 01:41:59,262 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 01:41:59,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:41:59,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:41:59,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:41:59,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813700924] [2020-07-21 01:41:59,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:41:59,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 01:41:59,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771036193] [2020-07-21 01:41:59,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:41:59,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:59,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:41:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=59, Unknown=2, NotChecked=0, Total=90 [2020-07-21 01:41:59,478 INFO L87 Difference]: Start difference. First operand 6860 states and 7068 transitions. Second operand 8 states. [2020-07-21 01:42:13,866 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 01:42:14,609 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 6 [2020-07-21 01:42:27,795 WARN L193 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-07-21 01:42:58,617 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 32 DAG size of output: 13 [2020-07-21 01:43:01,013 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 16 [2020-07-21 01:43:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:17,926 INFO L93 Difference]: Finished difference Result 14462 states and 14936 transitions. [2020-07-21 01:43:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:43:17,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1650 [2020-07-21 01:43:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:17,951 INFO L225 Difference]: With dead ends: 14462 [2020-07-21 01:43:17,951 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:43:17,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1705 GetRequests, 1689 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=100, Invalid=169, Unknown=3, NotChecked=0, Total=272 [2020-07-21 01:43:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:43:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:43:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:43:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:43:17,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1650 [2020-07-21 01:43:17,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:17,964 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:43:17,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:43:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:43:17,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:43:18,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:18,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:43:23,023 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 519 [2020-07-21 01:43:23,541 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 519 [2020-07-21 01:43:24,123 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 01:43:25,551 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 109 DAG size of output: 32 [2020-07-21 01:45:06,040 WARN L193 SmtUtils]: Spent 1.67 m on a formula simplification. DAG size of input: 465 DAG size of output: 192 [2020-07-21 01:45:06,385 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2020-07-21 01:46:09,906 WARN L193 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 541 DAG size of output: 157