/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:58:14,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:58:14,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:58:14,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:58:14,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:58:14,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:58:14,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:58:14,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:58:14,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:58:14,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:58:14,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:58:14,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:58:14,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:58:14,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:58:14,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:58:14,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:58:14,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:58:14,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:58:14,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:58:14,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:58:14,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:58:14,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:58:14,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:58:14,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:58:14,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:58:14,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:58:14,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:58:14,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:58:14,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:58:14,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:58:14,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:58:14,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:58:14,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:58:14,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:58:14,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:58:14,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:58:14,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:58:14,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:58:14,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:58:14,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:58:14,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:58:14,338 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 20:58:14,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:58:14,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:58:14,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:58:14,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:58:14,353 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:58:14,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:58:14,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:58:14,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:58:14,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:58:14,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:58:14,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:58:14,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:58:14,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:58:14,355 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:58:14,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:58:14,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:58:14,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:58:14,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:58:14,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:58:14,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:58:14,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:58:14,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:58:14,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:58:14,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:58:14,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:58:14,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:58:14,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:14,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:58:14,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:58:14,358 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 -> DAGSIZE 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 -> 2 [2020-07-21 20:58:14,623 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:58:14,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:58:14,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:58:14,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:58:14,645 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:58:14,647 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 20:58:14,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcfbd3a38/b898aeec9fcb4295bfe1961800f5528c/FLAGce6494a65 [2020-07-21 20:58:15,254 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:58:15,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 20:58:15,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcfbd3a38/b898aeec9fcb4295bfe1961800f5528c/FLAGce6494a65 [2020-07-21 20:58:15,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcfbd3a38/b898aeec9fcb4295bfe1961800f5528c [2020-07-21 20:58:15,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:58:15,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:58:15,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:58:15,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:58:15,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:58:15,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:58:15" (1/1) ... [2020-07-21 20:58:15,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed5a0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:15, skipping insertion in model container [2020-07-21 20:58:15,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:58:15" (1/1) ... [2020-07-21 20:58:15,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:58:15,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:58:15,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:58:15,906 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:58:16,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:58:16,146 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:58:16,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16 WrapperNode [2020-07-21 20:58:16,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:58:16,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:58:16,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:58:16,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:58:16,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (1/1) ... [2020-07-21 20:58:16,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:58:16,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:58:16,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:58:16,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:58:16,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (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 20:58:16,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:58:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:58:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 20:58:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 20:58:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 20:58:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 20:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 20:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 20:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 20:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 20:58:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 20:58:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 20:58:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 20:58:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 20:58:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 20:58:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 20:58:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 20:58:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-21 20:58:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 20:58:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 20:58:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 20:58:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 20:58:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 20:58:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 20:58:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 20:58:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 20:58:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 20:58:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 20:58:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 20:58:16,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 20:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 20:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 20:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 20:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 20:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 20:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 20:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 20:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 20:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 20:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 20:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 20:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 20:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 20:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 20:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 20:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 20:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 20:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 20:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 20:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 20:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 20:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 20:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 20:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 20:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 20:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 20:58:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 20:58:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 20:58:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 20:58:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 20:58:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 20:58:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 20:58:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:58:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:58:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:58:17,817 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:58:17,817 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 20:58:17,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:58:17 BoogieIcfgContainer [2020-07-21 20:58:17,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:58:17,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:58:17,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:58:17,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:58:17,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:58:15" (1/3) ... [2020-07-21 20:58:17,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1724f460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:58:17, skipping insertion in model container [2020-07-21 20:58:17,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:16" (2/3) ... [2020-07-21 20:58:17,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1724f460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:58:17, skipping insertion in model container [2020-07-21 20:58:17,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:58:17" (3/3) ... [2020-07-21 20:58:17,840 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-21 20:58:17,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:58:17,871 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:58:17,888 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:58:17,923 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:58:17,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:58:17,924 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:58:17,924 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:58:17,924 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:58:17,925 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:58:17,925 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:58:17,926 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:58:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-21 20:58:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 20:58:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:17,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:17,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-21 20:58:17,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:17,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902714339] [2020-07-21 20:58:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:18,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:18,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:18,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:18,593 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 20:58:18,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:18,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902714339] [2020-07-21 20:58:18,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:18,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:18,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236731822] [2020-07-21 20:58:18,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:18,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:18,626 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-21 20:58:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:18,734 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-21 20:58:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:18,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 20:58:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:18,755 INFO L225 Difference]: With dead ends: 1034 [2020-07-21 20:58:18,755 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 20:58:18,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 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 20:58:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 20:58:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 20:58:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 20:58:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-21 20:58:18,859 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-21 20:58:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:18,861 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-21 20:58:18,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-21 20:58:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 20:58:18,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:18,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:19,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:19,083 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-21 20:58:19,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:19,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93362293] [2020-07-21 20:58:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:19,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:19,396 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 20:58:19,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:19,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93362293] [2020-07-21 20:58:19,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:19,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:19,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268222625] [2020-07-21 20:58:19,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:19,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:19,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:19,403 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-21 20:58:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:19,486 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-21 20:58:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:19,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 20:58:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:19,498 INFO L225 Difference]: With dead ends: 1010 [2020-07-21 20:58:19,499 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 20:58:19,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 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 20:58:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 20:58:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 20:58:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 20:58:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-21 20:58:19,564 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-21 20:58:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:19,567 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-21 20:58:19,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-21 20:58:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 20:58:19,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:19,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:19,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:19,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-21 20:58:19,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:19,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026240570] [2020-07-21 20:58:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:19,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:20,056 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 20:58:20,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:20,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026240570] [2020-07-21 20:58:20,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:20,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:20,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144153240] [2020-07-21 20:58:20,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:20,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:20,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:20,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:20,060 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-21 20:58:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:20,136 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-21 20:58:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:20,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 20:58:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:20,144 INFO L225 Difference]: With dead ends: 1479 [2020-07-21 20:58:20,145 INFO L226 Difference]: Without dead ends: 996 [2020-07-21 20:58:20,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 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 20:58:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-21 20:58:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-21 20:58:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-21 20:58:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-21 20:58:20,205 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-21 20:58:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:20,206 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-21 20:58:20,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-21 20:58:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:20,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:20,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:20,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:20,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:20,427 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-21 20:58:20,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:20,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002520382] [2020-07-21 20:58:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:20,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:20,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:58:20,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:20,937 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 20:58:20,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:20,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002520382] [2020-07-21 20:58:20,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:20,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:20,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541148521] [2020-07-21 20:58:20,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:20,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:20,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:20,940 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 6 states. [2020-07-21 20:58:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:21,045 INFO L93 Difference]: Finished difference Result 1997 states and 3101 transitions. [2020-07-21 20:58:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:21,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 20:58:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:21,055 INFO L225 Difference]: With dead ends: 1997 [2020-07-21 20:58:21,055 INFO L226 Difference]: Without dead ends: 1058 [2020-07-21 20:58:21,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-07-21 20:58:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1000. [2020-07-21 20:58:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-07-21 20:58:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1498 transitions. [2020-07-21 20:58:21,136 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1498 transitions. Word has length 255 [2020-07-21 20:58:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:21,138 INFO L479 AbstractCegarLoop]: Abstraction has 1000 states and 1498 transitions. [2020-07-21 20:58:21,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1498 transitions. [2020-07-21 20:58:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:21,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:21,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:21,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:21,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash -660621370, now seen corresponding path program 1 times [2020-07-21 20:58:21,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:21,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216182092] [2020-07-21 20:58:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:21,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:58:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:21,810 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 20:58:21,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:21,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216182092] [2020-07-21 20:58:21,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:21,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:21,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682832993] [2020-07-21 20:58:21,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:21,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:21,813 INFO L87 Difference]: Start difference. First operand 1000 states and 1498 transitions. Second operand 6 states. [2020-07-21 20:58:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:21,895 INFO L93 Difference]: Finished difference Result 2005 states and 3101 transitions. [2020-07-21 20:58:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:21,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 20:58:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:21,902 INFO L225 Difference]: With dead ends: 2005 [2020-07-21 20:58:21,902 INFO L226 Difference]: Without dead ends: 1056 [2020-07-21 20:58:21,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2020-07-21 20:58:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1010. [2020-07-21 20:58:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-07-21 20:58:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1508 transitions. [2020-07-21 20:58:21,957 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1508 transitions. Word has length 255 [2020-07-21 20:58:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:21,957 INFO L479 AbstractCegarLoop]: Abstraction has 1010 states and 1508 transitions. [2020-07-21 20:58:21,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1508 transitions. [2020-07-21 20:58:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:21,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:21,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:22,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:22,176 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:22,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1061381316, now seen corresponding path program 1 times [2020-07-21 20:58:22,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:22,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25385226] [2020-07-21 20:58:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:22,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:58:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:22,612 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 20:58:22,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:22,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25385226] [2020-07-21 20:58:22,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:22,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:22,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947091612] [2020-07-21 20:58:22,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:22,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:22,614 INFO L87 Difference]: Start difference. First operand 1010 states and 1508 transitions. Second operand 6 states. [2020-07-21 20:58:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:22,695 INFO L93 Difference]: Finished difference Result 2013 states and 3101 transitions. [2020-07-21 20:58:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:22,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 20:58:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:22,703 INFO L225 Difference]: With dead ends: 2013 [2020-07-21 20:58:22,703 INFO L226 Difference]: Without dead ends: 1054 [2020-07-21 20:58:22,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-07-21 20:58:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1020. [2020-07-21 20:58:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2020-07-21 20:58:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1518 transitions. [2020-07-21 20:58:22,757 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1518 transitions. Word has length 255 [2020-07-21 20:58:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:22,758 INFO L479 AbstractCegarLoop]: Abstraction has 1020 states and 1518 transitions. [2020-07-21 20:58:22,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1518 transitions. [2020-07-21 20:58:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:22,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:22,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:22,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:22,976 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 30340418, now seen corresponding path program 1 times [2020-07-21 20:58:22,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:22,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080884154] [2020-07-21 20:58:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:23,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2244 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:58:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:23,409 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 20:58:23,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:23,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080884154] [2020-07-21 20:58:23,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:23,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:23,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005893691] [2020-07-21 20:58:23,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:23,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:23,412 INFO L87 Difference]: Start difference. First operand 1020 states and 1518 transitions. Second operand 6 states. [2020-07-21 20:58:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:23,480 INFO L93 Difference]: Finished difference Result 2009 states and 3081 transitions. [2020-07-21 20:58:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:23,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 20:58:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:23,488 INFO L225 Difference]: With dead ends: 2009 [2020-07-21 20:58:23,488 INFO L226 Difference]: Without dead ends: 1040 [2020-07-21 20:58:23,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-07-21 20:58:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1030. [2020-07-21 20:58:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-07-21 20:58:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1528 transitions. [2020-07-21 20:58:23,536 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1528 transitions. Word has length 255 [2020-07-21 20:58:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:23,536 INFO L479 AbstractCegarLoop]: Abstraction has 1030 states and 1528 transitions. [2020-07-21 20:58:23,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1528 transitions. [2020-07-21 20:58:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:23,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:23,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:23,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:23,754 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 447737024, now seen corresponding path program 1 times [2020-07-21 20:58:23,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:23,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950734120] [2020-07-21 20:58:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:24,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:24,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2245 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:24,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:24,231 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 20:58:24,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:24,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950734120] [2020-07-21 20:58:24,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:24,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:24,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442906058] [2020-07-21 20:58:24,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:24,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:24,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:24,234 INFO L87 Difference]: Start difference. First operand 1030 states and 1528 transitions. Second operand 3 states. [2020-07-21 20:58:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:24,365 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2020-07-21 20:58:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:24,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:24,381 INFO L225 Difference]: With dead ends: 2964 [2020-07-21 20:58:24,381 INFO L226 Difference]: Without dead ends: 1985 [2020-07-21 20:58:24,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-07-21 20:58:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1978. [2020-07-21 20:58:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-07-21 20:58:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2938 transitions. [2020-07-21 20:58:24,503 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2938 transitions. Word has length 255 [2020-07-21 20:58:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:24,504 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2938 transitions. [2020-07-21 20:58:24,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2938 transitions. [2020-07-21 20:58:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:24,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:24,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:24,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:24,722 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1762377469, now seen corresponding path program 1 times [2020-07-21 20:58:24,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:24,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109745203] [2020-07-21 20:58:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:25,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:25,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:25,183 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 20:58:25,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:25,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109745203] [2020-07-21 20:58:25,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:25,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:25,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662824785] [2020-07-21 20:58:25,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:25,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:25,186 INFO L87 Difference]: Start difference. First operand 1978 states and 2938 transitions. Second operand 3 states. [2020-07-21 20:58:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:25,355 INFO L93 Difference]: Finished difference Result 5822 states and 8840 transitions. [2020-07-21 20:58:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:25,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:25,379 INFO L225 Difference]: With dead ends: 5822 [2020-07-21 20:58:25,380 INFO L226 Difference]: Without dead ends: 3895 [2020-07-21 20:58:25,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2020-07-21 20:58:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3886. [2020-07-21 20:58:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3886 states. [2020-07-21 20:58:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5775 transitions. [2020-07-21 20:58:25,570 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5775 transitions. Word has length 255 [2020-07-21 20:58:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:25,571 INFO L479 AbstractCegarLoop]: Abstraction has 3886 states and 5775 transitions. [2020-07-21 20:58:25,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5775 transitions. [2020-07-21 20:58:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:25,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:25,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:25,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:25,788 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -154122908, now seen corresponding path program 1 times [2020-07-21 20:58:25,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:25,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118684502] [2020-07-21 20:58:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:25,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:25,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:26,035 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 20:58:26,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:26,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118684502] [2020-07-21 20:58:26,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:26,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:26,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456807985] [2020-07-21 20:58:26,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:26,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:26,039 INFO L87 Difference]: Start difference. First operand 3886 states and 5775 transitions. Second operand 3 states. [2020-07-21 20:58:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:26,205 INFO L93 Difference]: Finished difference Result 7103 states and 10426 transitions. [2020-07-21 20:58:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:26,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:26,234 INFO L225 Difference]: With dead ends: 7103 [2020-07-21 20:58:26,234 INFO L226 Difference]: Without dead ends: 3250 [2020-07-21 20:58:26,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 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 20:58:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-07-21 20:58:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3250. [2020-07-21 20:58:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3250 states. [2020-07-21 20:58:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 4699 transitions. [2020-07-21 20:58:26,445 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 4699 transitions. Word has length 255 [2020-07-21 20:58:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:26,446 INFO L479 AbstractCegarLoop]: Abstraction has 3250 states and 4699 transitions. [2020-07-21 20:58:26,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 4699 transitions. [2020-07-21 20:58:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:26,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:26,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:26,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:26,708 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash -506779422, now seen corresponding path program 1 times [2020-07-21 20:58:26,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:26,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133533246] [2020-07-21 20:58:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:26,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:58:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:58:26,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:26,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133533246] [2020-07-21 20:58:26,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:26,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:26,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358058879] [2020-07-21 20:58:26,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:26,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:26,922 INFO L87 Difference]: Start difference. First operand 3250 states and 4699 transitions. Second operand 6 states. [2020-07-21 20:58:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:27,069 INFO L93 Difference]: Finished difference Result 6589 states and 9727 transitions. [2020-07-21 20:58:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:27,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 20:58:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:27,089 INFO L225 Difference]: With dead ends: 6589 [2020-07-21 20:58:27,090 INFO L226 Difference]: Without dead ends: 3372 [2020-07-21 20:58:27,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-07-21 20:58:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3372. [2020-07-21 20:58:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3372 states. [2020-07-21 20:58:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4880 transitions. [2020-07-21 20:58:27,245 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4880 transitions. Word has length 255 [2020-07-21 20:58:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:27,245 INFO L479 AbstractCegarLoop]: Abstraction has 3372 states and 4880 transitions. [2020-07-21 20:58:27,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4880 transitions. [2020-07-21 20:58:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:27,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:27,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:27,463 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash -34439776, now seen corresponding path program 1 times [2020-07-21 20:58:27,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:27,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746856344] [2020-07-21 20:58:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:27,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:27,883 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 20:58:27,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:27,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746856344] [2020-07-21 20:58:27,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:27,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:27,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969933955] [2020-07-21 20:58:27,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:27,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:27,886 INFO L87 Difference]: Start difference. First operand 3372 states and 4880 transitions. Second operand 3 states. [2020-07-21 20:58:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:28,105 INFO L93 Difference]: Finished difference Result 9967 states and 14727 transitions. [2020-07-21 20:58:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:28,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:28,152 INFO L225 Difference]: With dead ends: 9967 [2020-07-21 20:58:28,152 INFO L226 Difference]: Without dead ends: 6628 [2020-07-21 20:58:28,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2020-07-21 20:58:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 6613. [2020-07-21 20:58:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6613 states. [2020-07-21 20:58:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6613 states to 6613 states and 9607 transitions. [2020-07-21 20:58:28,545 INFO L78 Accepts]: Start accepts. Automaton has 6613 states and 9607 transitions. Word has length 255 [2020-07-21 20:58:28,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:28,546 INFO L479 AbstractCegarLoop]: Abstraction has 6613 states and 9607 transitions. [2020-07-21 20:58:28,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6613 states and 9607 transitions. [2020-07-21 20:58:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:28,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:28,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:28,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:28,764 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash -596284253, now seen corresponding path program 1 times [2020-07-21 20:58:28,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:28,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569575640] [2020-07-21 20:58:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:29,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 2233 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:29,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:29,194 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 20:58:29,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:29,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569575640] [2020-07-21 20:58:29,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:29,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:29,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114068472] [2020-07-21 20:58:29,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:29,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:29,197 INFO L87 Difference]: Start difference. First operand 6613 states and 9607 transitions. Second operand 3 states. [2020-07-21 20:58:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:29,587 INFO L93 Difference]: Finished difference Result 19608 states and 29118 transitions. [2020-07-21 20:58:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:29,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:29,653 INFO L225 Difference]: With dead ends: 19608 [2020-07-21 20:58:29,653 INFO L226 Difference]: Without dead ends: 13028 [2020-07-21 20:58:29,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13028 states. [2020-07-21 20:58:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13028 to 13001. [2020-07-21 20:58:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13001 states. [2020-07-21 20:58:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13001 states to 13001 states and 18981 transitions. [2020-07-21 20:58:30,204 INFO L78 Accepts]: Start accepts. Automaton has 13001 states and 18981 transitions. Word has length 255 [2020-07-21 20:58:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:30,205 INFO L479 AbstractCegarLoop]: Abstraction has 13001 states and 18981 transitions. [2020-07-21 20:58:30,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13001 states and 18981 transitions. [2020-07-21 20:58:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:30,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:30,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:30,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:30,421 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 722216550, now seen corresponding path program 1 times [2020-07-21 20:58:30,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995297663] [2020-07-21 20:58:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:30,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:30,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:30,892 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 20:58:30,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:30,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995297663] [2020-07-21 20:58:30,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:30,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:30,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371177833] [2020-07-21 20:58:30,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:30,894 INFO L87 Difference]: Start difference. First operand 13001 states and 18981 transitions. Second operand 3 states. [2020-07-21 20:58:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:31,489 INFO L93 Difference]: Finished difference Result 38680 states and 57896 transitions. [2020-07-21 20:58:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:31,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:31,597 INFO L225 Difference]: With dead ends: 38680 [2020-07-21 20:58:31,597 INFO L226 Difference]: Without dead ends: 25712 [2020-07-21 20:58:31,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2020-07-21 20:58:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 25661. [2020-07-21 20:58:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25661 states. [2020-07-21 20:58:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25661 states to 25661 states and 37723 transitions. [2020-07-21 20:58:33,354 INFO L78 Accepts]: Start accepts. Automaton has 25661 states and 37723 transitions. Word has length 255 [2020-07-21 20:58:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:33,355 INFO L479 AbstractCegarLoop]: Abstraction has 25661 states and 37723 transitions. [2020-07-21 20:58:33,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 25661 states and 37723 transitions. [2020-07-21 20:58:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:33,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:33,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:33,573 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1442448809, now seen corresponding path program 1 times [2020-07-21 20:58:33,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:33,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053463871] [2020-07-21 20:58:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:33,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:34,094 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 20:58:34,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:34,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053463871] [2020-07-21 20:58:34,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:34,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:34,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72122777] [2020-07-21 20:58:34,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:34,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:34,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:34,096 INFO L87 Difference]: Start difference. First operand 25661 states and 37723 transitions. Second operand 3 states. [2020-07-21 20:58:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:35,262 INFO L93 Difference]: Finished difference Result 76612 states and 115502 transitions. [2020-07-21 20:58:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:35,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:35,461 INFO L225 Difference]: With dead ends: 76612 [2020-07-21 20:58:35,461 INFO L226 Difference]: Without dead ends: 50984 [2020-07-21 20:58:35,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50984 states. [2020-07-21 20:58:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50984 to 50885. [2020-07-21 20:58:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50885 states. [2020-07-21 20:58:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50885 states to 50885 states and 75353 transitions. [2020-07-21 20:58:38,598 INFO L78 Accepts]: Start accepts. Automaton has 50885 states and 75353 transitions. Word has length 255 [2020-07-21 20:58:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:38,598 INFO L479 AbstractCegarLoop]: Abstraction has 50885 states and 75353 transitions. [2020-07-21 20:58:38,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 50885 states and 75353 transitions. [2020-07-21 20:58:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:38,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:38,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:38,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:38,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1798045256, now seen corresponding path program 1 times [2020-07-21 20:58:38,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:38,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440584888] [2020-07-21 20:58:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:39,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:39,209 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 20:58:39,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:39,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440584888] [2020-07-21 20:58:39,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:39,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:39,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055154009] [2020-07-21 20:58:39,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:39,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:39,212 INFO L87 Difference]: Start difference. First operand 50885 states and 75353 transitions. Second operand 3 states. [2020-07-21 20:58:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:41,249 INFO L93 Difference]: Finished difference Result 151980 states and 231828 transitions. [2020-07-21 20:58:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:41,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:41,592 INFO L225 Difference]: With dead ends: 151980 [2020-07-21 20:58:41,592 INFO L226 Difference]: Without dead ends: 101128 [2020-07-21 20:58:41,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101128 states. [2020-07-21 20:58:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101128 to 100933. [2020-07-21 20:58:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100933 states. [2020-07-21 20:58:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100933 states to 100933 states and 151139 transitions. [2020-07-21 20:58:46,490 INFO L78 Accepts]: Start accepts. Automaton has 100933 states and 151139 transitions. Word has length 255 [2020-07-21 20:58:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:46,490 INFO L479 AbstractCegarLoop]: Abstraction has 100933 states and 151139 transitions. [2020-07-21 20:58:46,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 100933 states and 151139 transitions. [2020-07-21 20:58:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:58:46,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:46,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:46,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:46,700 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 520892583, now seen corresponding path program 1 times [2020-07-21 20:58:46,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:46,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404039817] [2020-07-21 20:58:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:58:47,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:47,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 2219 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:47,097 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 20:58:47,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:47,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404039817] [2020-07-21 20:58:47,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:47,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:47,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345330230] [2020-07-21 20:58:47,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:47,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:47,099 INFO L87 Difference]: Start difference. First operand 100933 states and 151139 transitions. Second operand 3 states. [2020-07-21 20:58:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:54,980 INFO L93 Difference]: Finished difference Result 301516 states and 468198 transitions. [2020-07-21 20:58:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:54,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:58:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:55,588 INFO L225 Difference]: With dead ends: 301516 [2020-07-21 20:58:55,588 INFO L226 Difference]: Without dead ends: 200616 [2020-07-21 20:58:55,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:58:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200616 states. [2020-07-21 20:59:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200616 to 200229. [2020-07-21 20:59:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200229 states. [2020-07-21 20:59:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200229 states to 200229 states and 304897 transitions. [2020-07-21 20:59:01,758 INFO L78 Accepts]: Start accepts. Automaton has 200229 states and 304897 transitions. Word has length 255 [2020-07-21 20:59:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:59:01,759 INFO L479 AbstractCegarLoop]: Abstraction has 200229 states and 304897 transitions. [2020-07-21 20:59:01,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:59:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 200229 states and 304897 transitions. [2020-07-21 20:59:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:59:01,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:59:01,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:01,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:59:01,976 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:59:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:59:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1821728186, now seen corresponding path program 1 times [2020-07-21 20:59:01,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:59:01,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014953136] [2020-07-21 20:59:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:59:02,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:59:02,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:59:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:59:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:59:02,352 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 20:59:02,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:59:02,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014953136] [2020-07-21 20:59:02,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:59:02,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:59:02,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480688895] [2020-07-21 20:59:02,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:59:02,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:59:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:59:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:59:02,355 INFO L87 Difference]: Start difference. First operand 200229 states and 304897 transitions. Second operand 3 states. [2020-07-21 20:59:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:59:19,041 INFO L93 Difference]: Finished difference Result 599340 states and 956732 transitions. [2020-07-21 20:59:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:59:19,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 20:59:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:59:20,402 INFO L225 Difference]: With dead ends: 599340 [2020-07-21 20:59:20,402 INFO L226 Difference]: Without dead ends: 399144 [2020-07-21 20:59:22,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 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 20:59:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399144 states. [2020-07-21 20:59:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399144 to 398373. [2020-07-21 20:59:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398373 states. [2020-07-21 20:59:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398373 states to 398373 states and 621979 transitions. [2020-07-21 20:59:51,009 INFO L78 Accepts]: Start accepts. Automaton has 398373 states and 621979 transitions. Word has length 255 [2020-07-21 20:59:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:59:51,009 INFO L479 AbstractCegarLoop]: Abstraction has 398373 states and 621979 transitions. [2020-07-21 20:59:51,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:59:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 398373 states and 621979 transitions. [2020-07-21 20:59:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 20:59:51,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:59:51,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:51,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:59:51,225 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:59:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:59:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash 566754917, now seen corresponding path program 1 times [2020-07-21 20:59:51,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:59:51,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776797551] [2020-07-21 20:59:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:59:53,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:59:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:59:53,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 2213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:59:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:59:53,135 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 20:59:53,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:59:53,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776797551] [2020-07-21 20:59:53,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:59:53,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:59:53,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684125284] [2020-07-21 20:59:53,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:59:53,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:59:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:59:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:59:53,138 INFO L87 Difference]: Start difference. First operand 398373 states and 621979 transitions. Second operand 5 states. [2020-07-21 21:00:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:00:16,537 INFO L93 Difference]: Finished difference Result 796714 states and 1246218 transitions. [2020-07-21 21:00:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:00:16,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:00:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:00:17,769 INFO L225 Difference]: With dead ends: 796714 [2020-07-21 21:00:17,769 INFO L226 Difference]: Without dead ends: 398373 [2020-07-21 21:00:19,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:00:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398373 states. [2020-07-21 21:00:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398373 to 398373. [2020-07-21 21:00:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398373 states. [2020-07-21 21:00:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398373 states to 398373 states and 619675 transitions. [2020-07-21 21:00:45,338 INFO L78 Accepts]: Start accepts. Automaton has 398373 states and 619675 transitions. Word has length 255 [2020-07-21 21:00:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:00:45,339 INFO L479 AbstractCegarLoop]: Abstraction has 398373 states and 619675 transitions. [2020-07-21 21:00:45,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:00:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 398373 states and 619675 transitions. [2020-07-21 21:00:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:00:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:00:45,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:45,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:00:45,556 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:00:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:00:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash -675187803, now seen corresponding path program 1 times [2020-07-21 21:00:45,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:00:45,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252221599] [2020-07-21 21:00:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:00:45,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:00:45,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:00:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:00:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:00:46,010 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 21:00:46,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:00:46,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252221599] [2020-07-21 21:00:46,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:00:46,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:00:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942778303] [2020-07-21 21:00:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:00:46,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:00:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:00:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:00:46,014 INFO L87 Difference]: Start difference. First operand 398373 states and 619675 transitions. Second operand 5 states. [2020-07-21 21:01:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:01:23,536 INFO L93 Difference]: Finished difference Result 894187 states and 1533940 transitions. [2020-07-21 21:01:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:01:23,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:01:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:01:36,730 INFO L225 Difference]: With dead ends: 894187 [2020-07-21 21:01:36,731 INFO L226 Difference]: Without dead ends: 495846 [2020-07-21 21:01:40,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:01:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495846 states. [2020-07-21 21:02:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495846 to 469605. [2020-07-21 21:02:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-21 21:02:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 705371 transitions. [2020-07-21 21:02:17,752 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 705371 transitions. Word has length 255 [2020-07-21 21:02:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:17,752 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 705371 transitions. [2020-07-21 21:02:17,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:02:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 705371 transitions. [2020-07-21 21:02:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:02:17,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:17,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:17,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:17,955 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:17,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1765025381, now seen corresponding path program 1 times [2020-07-21 21:02:17,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:17,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584729909] [2020-07-21 21:02:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:02:18,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:02:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:18,340 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 21:02:18,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:18,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584729909] [2020-07-21 21:02:18,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:18,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:02:18,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404491662] [2020-07-21 21:02:18,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:02:18,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:02:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:18,343 INFO L87 Difference]: Start difference. First operand 469605 states and 705371 transitions. Second operand 5 states. [2020-07-21 21:02:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:45,990 INFO L93 Difference]: Finished difference Result 939178 states and 1413002 transitions. [2020-07-21 21:02:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:02:45,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:02:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:47,530 INFO L225 Difference]: With dead ends: 939178 [2020-07-21 21:02:47,530 INFO L226 Difference]: Without dead ends: 469605 [2020-07-21 21:02:49,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:02:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-21 21:03:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-21 21:03:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-21 21:03:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 703067 transitions. [2020-07-21 21:03:36,261 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 703067 transitions. Word has length 255 [2020-07-21 21:03:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:36,261 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 703067 transitions. [2020-07-21 21:03:36,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:03:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 703067 transitions. [2020-07-21 21:03:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:03:36,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:36,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:38,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:38,558 INFO L427 AbstractCegarLoop]: === Iteration 22 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash -578163803, now seen corresponding path program 1 times [2020-07-21 21:03:38,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:38,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820132332] [2020-07-21 21:03:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:03:38,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:38,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2195 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:03:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:38,960 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 21:03:38,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:38,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820132332] [2020-07-21 21:03:38,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:38,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:03:38,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424005164] [2020-07-21 21:03:38,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:03:38,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:03:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:38,961 INFO L87 Difference]: Start difference. First operand 469605 states and 703067 transitions. Second operand 5 states. [2020-07-21 21:04:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:04:07,570 INFO L93 Difference]: Finished difference Result 939178 states and 1408394 transitions. [2020-07-21 21:04:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:04:07,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:04:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:04:10,354 INFO L225 Difference]: With dead ends: 939178 [2020-07-21 21:04:10,354 INFO L226 Difference]: Without dead ends: 469605 [2020-07-21 21:04:11,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:04:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-21 21:04:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-21 21:04:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-21 21:04:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 700763 transitions. [2020-07-21 21:04:47,847 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 700763 transitions. Word has length 255 [2020-07-21 21:04:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:04:47,847 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 700763 transitions. [2020-07-21 21:04:47,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:04:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 700763 transitions. [2020-07-21 21:04:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:04:47,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:04:47,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:48,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:48,063 INFO L427 AbstractCegarLoop]: === Iteration 23 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:04:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:04:48,064 INFO L82 PathProgramCache]: Analyzing trace with hash -792297883, now seen corresponding path program 1 times [2020-07-21 21:04:48,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:04:48,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949356789] [2020-07-21 21:04:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 21:04:48,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:04:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:04:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2189 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:04:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:04:48,462 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 21:04:48,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:04:48,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949356789] [2020-07-21 21:04:48,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:04:48,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:04:48,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838108794] [2020-07-21 21:04:48,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:04:48,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:04:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:04:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:04:48,465 INFO L87 Difference]: Start difference. First operand 469605 states and 700763 transitions. Second operand 5 states. [2020-07-21 21:05:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:21,379 INFO L93 Difference]: Finished difference Result 939178 states and 1403786 transitions. [2020-07-21 21:05:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:05:21,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:05:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:22,921 INFO L225 Difference]: With dead ends: 939178 [2020-07-21 21:05:22,921 INFO L226 Difference]: Without dead ends: 469605 [2020-07-21 21:05:25,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:05:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-21 21:06:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-21 21:06:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-21 21:06:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 698459 transitions. [2020-07-21 21:06:04,206 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 698459 transitions. Word has length 255 [2020-07-21 21:06:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:04,207 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 698459 transitions. [2020-07-21 21:06:04,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:06:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 698459 transitions. [2020-07-21 21:06:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:06:04,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:04,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:06:04,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:04,409 INFO L427 AbstractCegarLoop]: === Iteration 24 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1711075621, now seen corresponding path program 1 times [2020-07-21 21:06:04,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:04,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730100789] [2020-07-21 21:06:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:04,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:04,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:06:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:04,812 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 21:06:04,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:04,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730100789] [2020-07-21 21:06:04,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:04,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:06:04,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425821101] [2020-07-21 21:06:04,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:06:04,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:06:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:06:04,816 INFO L87 Difference]: Start difference. First operand 469605 states and 698459 transitions. Second operand 5 states. [2020-07-21 21:06:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:52,287 INFO L93 Difference]: Finished difference Result 1036651 states and 1692468 transitions. [2020-07-21 21:06:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:06:52,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 21:06:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:56,086 INFO L225 Difference]: With dead ends: 1036651 [2020-07-21 21:06:56,086 INFO L226 Difference]: Without dead ends: 567078 [2020-07-21 21:07:18,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:07:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567078 states. [2020-07-21 21:07:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567078 to 540837. [2020-07-21 21:07:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540837 states. [2020-07-21 21:07:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540837 states to 540837 states and 783387 transitions. [2020-07-21 21:07:47,577 INFO L78 Accepts]: Start accepts. Automaton has 540837 states and 783387 transitions. Word has length 255 [2020-07-21 21:07:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:47,577 INFO L479 AbstractCegarLoop]: Abstraction has 540837 states and 783387 transitions. [2020-07-21 21:07:47,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:07:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 540837 states and 783387 transitions. [2020-07-21 21:07:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 21:07:47,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:47,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:47,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:47,780 INFO L427 AbstractCegarLoop]: === Iteration 25 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 770761701, now seen corresponding path program 1 times [2020-07-21 21:07:47,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:47,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69622104] [2020-07-21 21:07:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:48,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:07:48,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:07:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:48,163 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 21:07:48,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:48,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69622104] [2020-07-21 21:07:48,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:48,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:07:48,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949264900] [2020-07-21 21:07:48,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:07:48,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:07:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:07:48,164 INFO L87 Difference]: Start difference. First operand 540837 states and 783387 transitions. Second operand 5 states.