/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 NOT_INCREMENTALLY -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 [2020-07-20 12:26:39,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:26:39,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:26:39,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:26:39,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:26:39,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:26:39,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:26:39,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:26:39,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:26:39,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:26:39,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:26:39,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:26:39,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:26:39,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:26:39,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:26:39,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:26:39,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:26:39,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:26:39,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:26:39,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:26:39,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:26:39,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:26:39,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:26:39,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:26:39,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:26:39,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:26:39,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:26:39,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:26:39,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:26:39,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 12:26:39,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 12:26:39,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 12:26:39,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 12:26:39,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 12:26:39,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 12:26:39,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 12:26:39,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 12:26:39,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 12:26:39,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:26:39,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:26:39,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:26:39,301 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 [2020-07-20 12:26:39,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:26:39,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:26:39,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:26:39,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:26:39,324 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:26:39,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:26:39,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:26:39,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:26:39,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:26:39,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:26:39,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:26:39,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:26:39,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:26:39,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:26:39,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:26:39,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:26:39,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:26:39,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:26:39,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:26:39,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:26:39,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:26:39,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:26:39,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:26:39,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:26:39,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:26:39,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:26:39,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:39,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:26:39,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:26:39,331 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 -> NOT_INCREMENTALLY [2020-07-20 12:26:39,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:26:39,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:26:39,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:26:39,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:26:39,672 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:26:39,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-20 12:26:39,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa31a6006/e0fbb700b0954191aba53d17dd77af2f/FLAG5231ad722 [2020-07-20 12:26:40,320 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:26:40,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-20 12:26:40,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa31a6006/e0fbb700b0954191aba53d17dd77af2f/FLAG5231ad722 [2020-07-20 12:26:40,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa31a6006/e0fbb700b0954191aba53d17dd77af2f [2020-07-20 12:26:40,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:26:40,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:26:40,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:26:40,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:26:40,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:26:40,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:26:40" (1/1) ... [2020-07-20 12:26:40,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fe720f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:40, skipping insertion in model container [2020-07-20 12:26:40,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:26:40" (1/1) ... [2020-07-20 12:26:40,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:26:40,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:26:41,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:26:41,093 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:26:41,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:26:41,330 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:26:41,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41 WrapperNode [2020-07-20 12:26:41,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:26:41,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:26:41,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:26:41,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:26:41,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (1/1) ... [2020-07-20 12:26:41,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:26:41,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:26:41,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:26:41,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:26:41,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (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 [2020-07-20 12:26:41,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:26:41,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:26:41,539 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-20 12:26:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-20 12:26:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-20 12:26:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-20 12:26:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-20 12:26:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-20 12:26:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-20 12:26:41,541 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-20 12:26:41,542 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-20 12:26:41,542 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-20 12:26:41,543 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-20 12:26:41,543 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-20 12:26:41,543 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-20 12:26:41,544 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-20 12:26:41,544 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-20 12:26:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-20 12:26:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-20 12:26:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-20 12:26:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-20 12:26:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-20 12:26:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-20 12:26:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-20 12:26:41,547 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-20 12:26:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-20 12:26:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-20 12:26:41,548 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-20 12:26:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-20 12:26:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-20 12:26:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 12:26:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-20 12:26:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-20 12:26:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-20 12:26:41,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-20 12:26:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-20 12:26:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-20 12:26:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-20 12:26:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-20 12:26:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-20 12:26:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-20 12:26:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-20 12:26:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-20 12:26:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-20 12:26:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-20 12:26:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-20 12:26:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-20 12:26:41,556 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-20 12:26:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-20 12:26:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-20 12:26:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-20 12:26:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-20 12:26:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-20 12:26:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-20 12:26:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-20 12:26:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 12:26:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-20 12:26:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-20 12:26:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-20 12:26:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:26:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:26:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:26:42,933 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:26:42,933 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-20 12:26:42,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:26:42 BoogieIcfgContainer [2020-07-20 12:26:42,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:26:42,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:26:42,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:26:42,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:26:42,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:26:40" (1/3) ... [2020-07-20 12:26:42,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4cc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:26:42, skipping insertion in model container [2020-07-20 12:26:42,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:41" (2/3) ... [2020-07-20 12:26:42,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4cc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:26:42, skipping insertion in model container [2020-07-20 12:26:42,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:26:42" (3/3) ... [2020-07-20 12:26:42,951 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-20 12:26:42,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:26:42,970 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:26:42,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:26:43,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:26:43,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:26:43,011 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:26:43,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:26:43,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:26:43,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:26:43,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:26:43,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:26:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-20 12:26:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 12:26:43,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:43,064 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] [2020-07-20 12:26:43,064 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-20 12:26:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:43,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411419188] [2020-07-20 12:26:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:43,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:43,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411419188] [2020-07-20 12:26:43,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:43,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:43,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185699747] [2020-07-20 12:26:43,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:43,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:43,802 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-20 12:26:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:43,929 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-20 12:26:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:43,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 12:26:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:43,951 INFO L225 Difference]: With dead ends: 1034 [2020-07-20 12:26:43,951 INFO L226 Difference]: Without dead ends: 517 [2020-07-20 12:26:43,961 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 [2020-07-20 12:26:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-20 12:26:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-20 12:26:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-20 12:26:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-20 12:26:44,124 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-20 12:26:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:44,129 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-20 12:26:44,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-20 12:26:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 12:26:44,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:44,146 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] [2020-07-20 12:26:44,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:44,363 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-20 12:26:44,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:44,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881251562] [2020-07-20 12:26:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:44,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2233 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:44,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:44,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881251562] [2020-07-20 12:26:44,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:44,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:44,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859549271] [2020-07-20 12:26:44,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:44,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:44,871 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-20 12:26:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:44,949 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-20 12:26:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:44,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 12:26:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:44,954 INFO L225 Difference]: With dead ends: 1010 [2020-07-20 12:26:44,954 INFO L226 Difference]: Without dead ends: 517 [2020-07-20 12:26:44,957 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 [2020-07-20 12:26:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-20 12:26:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-20 12:26:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-20 12:26:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-20 12:26:44,984 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-20 12:26:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:44,985 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-20 12:26:44,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-20 12:26:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 12:26:44,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:44,990 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] [2020-07-20 12:26:45,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:45,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-20 12:26:45,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:45,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171026896] [2020-07-20 12:26:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:45,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:45,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171026896] [2020-07-20 12:26:45,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:45,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:45,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879618724] [2020-07-20 12:26:45,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:45,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:45,623 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-20 12:26:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:45,715 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-20 12:26:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:45,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 12:26:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:45,725 INFO L225 Difference]: With dead ends: 1479 [2020-07-20 12:26:45,725 INFO L226 Difference]: Without dead ends: 996 [2020-07-20 12:26:45,728 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 [2020-07-20 12:26:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-20 12:26:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-20 12:26:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-20 12:26:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-20 12:26:45,826 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-20 12:26:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:45,829 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-20 12:26:45,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-20 12:26:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:45,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:45,835 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] [2020-07-20 12:26:46,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:46,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-20 12:26:46,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:46,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520786865] [2020-07-20 12:26:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:46,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:46,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520786865] [2020-07-20 12:26:46,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:46,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:46,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103177298] [2020-07-20 12:26:46,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:46,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:46,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:46,489 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 3 states. [2020-07-20 12:26:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:46,642 INFO L93 Difference]: Finished difference Result 2854 states and 4374 transitions. [2020-07-20 12:26:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:46,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:46,657 INFO L225 Difference]: With dead ends: 2854 [2020-07-20 12:26:46,657 INFO L226 Difference]: Without dead ends: 1915 [2020-07-20 12:26:46,663 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 [2020-07-20 12:26:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-07-20 12:26:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1908. [2020-07-20 12:26:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-07-20 12:26:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2868 transitions. [2020-07-20 12:26:46,771 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2868 transitions. Word has length 255 [2020-07-20 12:26:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:46,772 INFO L479 AbstractCegarLoop]: Abstraction has 1908 states and 2868 transitions. [2020-07-20 12:26:46,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2868 transitions. [2020-07-20 12:26:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:46,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:46,779 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] [2020-07-20 12:26:46,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:46,995 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1424231433, now seen corresponding path program 1 times [2020-07-20 12:26:46,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:46,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898018054] [2020-07-20 12:26:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:47,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:47,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898018054] [2020-07-20 12:26:47,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:47,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:47,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468751290] [2020-07-20 12:26:47,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:47,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:47,397 INFO L87 Difference]: Start difference. First operand 1908 states and 2868 transitions. Second operand 3 states. [2020-07-20 12:26:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:47,634 INFO L93 Difference]: Finished difference Result 5612 states and 8630 transitions. [2020-07-20 12:26:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:47,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:47,659 INFO L225 Difference]: With dead ends: 5612 [2020-07-20 12:26:47,659 INFO L226 Difference]: Without dead ends: 3755 [2020-07-20 12:26:47,673 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 [2020-07-20 12:26:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2020-07-20 12:26:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3746. [2020-07-20 12:26:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3746 states. [2020-07-20 12:26:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 5635 transitions. [2020-07-20 12:26:47,866 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 5635 transitions. Word has length 255 [2020-07-20 12:26:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:47,866 INFO L479 AbstractCegarLoop]: Abstraction has 3746 states and 5635 transitions. [2020-07-20 12:26:47,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 5635 transitions. [2020-07-20 12:26:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:47,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:47,871 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] [2020-07-20 12:26:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:48,086 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1615137816, now seen corresponding path program 1 times [2020-07-20 12:26:48,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:48,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800976942] [2020-07-20 12:26:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:48,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:48,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800976942] [2020-07-20 12:26:48,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:48,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:48,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485532244] [2020-07-20 12:26:48,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:48,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:48,470 INFO L87 Difference]: Start difference. First operand 3746 states and 5635 transitions. Second operand 3 states. [2020-07-20 12:26:48,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:48,758 INFO L93 Difference]: Finished difference Result 11086 states and 17062 transitions. [2020-07-20 12:26:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:48,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:48,808 INFO L225 Difference]: With dead ends: 11086 [2020-07-20 12:26:48,808 INFO L226 Difference]: Without dead ends: 7391 [2020-07-20 12:26:48,829 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 [2020-07-20 12:26:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2020-07-20 12:26:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 7372. [2020-07-20 12:26:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7372 states. [2020-07-20 12:26:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 11119 transitions. [2020-07-20 12:26:49,225 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 11119 transitions. Word has length 255 [2020-07-20 12:26:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:49,226 INFO L479 AbstractCegarLoop]: Abstraction has 7372 states and 11119 transitions. [2020-07-20 12:26:49,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 11119 transitions. [2020-07-20 12:26:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:49,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:49,234 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] [2020-07-20 12:26:49,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:49,448 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -102323093, now seen corresponding path program 1 times [2020-07-20 12:26:49,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:49,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103043986] [2020-07-20 12:26:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:49,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:49,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103043986] [2020-07-20 12:26:49,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:49,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:49,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639957038] [2020-07-20 12:26:49,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:49,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:49,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:49,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:49,891 INFO L87 Difference]: Start difference. First operand 7372 states and 11119 transitions. Second operand 3 states. [2020-07-20 12:26:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:50,095 INFO L93 Difference]: Finished difference Result 13472 states and 20082 transitions. [2020-07-20 12:26:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:50,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:50,136 INFO L225 Difference]: With dead ends: 13472 [2020-07-20 12:26:50,136 INFO L226 Difference]: Without dead ends: 6133 [2020-07-20 12:26:50,173 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 [2020-07-20 12:26:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2020-07-20 12:26:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 6133. [2020-07-20 12:26:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6133 states. [2020-07-20 12:26:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9011 transitions. [2020-07-20 12:26:50,452 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9011 transitions. Word has length 255 [2020-07-20 12:26:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:50,452 INFO L479 AbstractCegarLoop]: Abstraction has 6133 states and 9011 transitions. [2020-07-20 12:26:50,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9011 transitions. [2020-07-20 12:26:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:50,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:50,456 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] [2020-07-20 12:26:50,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:50,670 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash -454979607, now seen corresponding path program 1 times [2020-07-20 12:26:50,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:50,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354884207] [2020-07-20 12:26:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:51,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:51,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:51,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354884207] [2020-07-20 12:26:51,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:51,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:51,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752953534] [2020-07-20 12:26:51,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:51,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:51,131 INFO L87 Difference]: Start difference. First operand 6133 states and 9011 transitions. Second operand 3 states. [2020-07-20 12:26:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:51,465 INFO L93 Difference]: Finished difference Result 18256 states and 27394 transitions. [2020-07-20 12:26:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:51,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:51,532 INFO L225 Difference]: With dead ends: 18256 [2020-07-20 12:26:51,533 INFO L226 Difference]: Without dead ends: 12156 [2020-07-20 12:26:51,571 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 [2020-07-20 12:26:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2020-07-20 12:26:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 12129. [2020-07-20 12:26:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12129 states. [2020-07-20 12:26:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12129 states to 12129 states and 17881 transitions. [2020-07-20 12:26:52,185 INFO L78 Accepts]: Start accepts. Automaton has 12129 states and 17881 transitions. Word has length 255 [2020-07-20 12:26:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:52,186 INFO L479 AbstractCegarLoop]: Abstraction has 12129 states and 17881 transitions. [2020-07-20 12:26:52,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12129 states and 17881 transitions. [2020-07-20 12:26:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:52,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:52,190 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] [2020-07-20 12:26:52,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:52,404 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash -167519702, now seen corresponding path program 1 times [2020-07-20 12:26:52,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:52,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134360220] [2020-07-20 12:26:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:52,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:52,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134360220] [2020-07-20 12:26:52,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:52,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:52,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740400943] [2020-07-20 12:26:52,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:52,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:52,788 INFO L87 Difference]: Start difference. First operand 12129 states and 17881 transitions. Second operand 3 states. [2020-07-20 12:26:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:53,920 INFO L93 Difference]: Finished difference Result 36240 states and 54724 transitions. [2020-07-20 12:26:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:53,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:54,044 INFO L225 Difference]: With dead ends: 36240 [2020-07-20 12:26:54,045 INFO L226 Difference]: Without dead ends: 24144 [2020-07-20 12:26:54,091 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 [2020-07-20 12:26:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24144 states. [2020-07-20 12:26:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24144 to 24093. [2020-07-20 12:26:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24093 states. [2020-07-20 12:26:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24093 states to 24093 states and 35707 transitions. [2020-07-20 12:26:55,201 INFO L78 Accepts]: Start accepts. Automaton has 24093 states and 35707 transitions. Word has length 255 [2020-07-20 12:26:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:55,201 INFO L479 AbstractCegarLoop]: Abstraction has 24093 states and 35707 transitions. [2020-07-20 12:26:55,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 24093 states and 35707 transitions. [2020-07-20 12:26:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:55,203 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] [2020-07-20 12:26:55,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:55,412 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash 970109163, now seen corresponding path program 1 times [2020-07-20 12:26:55,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:55,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250507824] [2020-07-20 12:26:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:26:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:55,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:55,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:55,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250507824] [2020-07-20 12:26:55,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:55,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:55,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977566592] [2020-07-20 12:26:55,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:55,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:55,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:55,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:55,803 INFO L87 Difference]: Start difference. First operand 24093 states and 35707 transitions. Second operand 3 states. [2020-07-20 12:26:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:56,730 INFO L93 Difference]: Finished difference Result 71908 states and 109422 transitions. [2020-07-20 12:26:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:56,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:26:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:56,939 INFO L225 Difference]: With dead ends: 71908 [2020-07-20 12:26:56,939 INFO L226 Difference]: Without dead ends: 47848 [2020-07-20 12:26:57,033 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 [2020-07-20 12:26:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47848 states. [2020-07-20 12:26:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47848 to 47749. [2020-07-20 12:26:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47749 states. [2020-07-20 12:26:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47749 states to 47749 states and 71321 transitions. [2020-07-20 12:26:59,903 INFO L78 Accepts]: Start accepts. Automaton has 47749 states and 71321 transitions. Word has length 255 [2020-07-20 12:26:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:59,904 INFO L479 AbstractCegarLoop]: Abstraction has 47749 states and 71321 transitions. [2020-07-20 12:26:59,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 47749 states and 71321 transitions. [2020-07-20 12:26:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:26:59,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:59,906 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] [2020-07-20 12:27:00,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:00,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:27:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:27:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1325705610, now seen corresponding path program 1 times [2020-07-20 12:27:00,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:27:00,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556057540] [2020-07-20 12:27:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:27:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:27:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:27:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:27:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:27:00,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:27:00,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556057540] [2020-07-20 12:27:00,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:27:00,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:27:00,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144851655] [2020-07-20 12:27:00,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:27:00,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:27:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:27:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:00,508 INFO L87 Difference]: Start difference. First operand 47749 states and 71321 transitions. Second operand 3 states. [2020-07-20 12:27:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:03,615 INFO L93 Difference]: Finished difference Result 142572 states and 219668 transitions. [2020-07-20 12:27:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:27:03,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:27:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:04,000 INFO L225 Difference]: With dead ends: 142572 [2020-07-20 12:27:04,000 INFO L226 Difference]: Without dead ends: 94856 [2020-07-20 12:27:04,315 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 [2020-07-20 12:27:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94856 states. [2020-07-20 12:27:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94856 to 94661. [2020-07-20 12:27:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94661 states. [2020-07-20 12:27:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94661 states to 94661 states and 143075 transitions. [2020-07-20 12:27:09,108 INFO L78 Accepts]: Start accepts. Automaton has 94661 states and 143075 transitions. Word has length 255 [2020-07-20 12:27:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:27:09,109 INFO L479 AbstractCegarLoop]: Abstraction has 94661 states and 143075 transitions. [2020-07-20 12:27:09,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:27:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 94661 states and 143075 transitions. [2020-07-20 12:27:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:27:09,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:27:09,111 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] [2020-07-20 12:27:09,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:09,312 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:27:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:27:09,313 INFO L82 PathProgramCache]: Analyzing trace with hash 48552937, now seen corresponding path program 1 times [2020-07-20 12:27:09,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:27:09,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923374912] [2020-07-20 12:27:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:27:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:27:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:27:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:27:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:27:09,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:27:09,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923374912] [2020-07-20 12:27:09,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:27:09,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:27:09,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100543997] [2020-07-20 12:27:09,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:27:09,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:27:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:27:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:09,704 INFO L87 Difference]: Start difference. First operand 94661 states and 143075 transitions. Second operand 3 states. [2020-07-20 12:27:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:13,654 INFO L93 Difference]: Finished difference Result 282700 states and 443878 transitions. [2020-07-20 12:27:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:27:13,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:27:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:14,346 INFO L225 Difference]: With dead ends: 282700 [2020-07-20 12:27:14,346 INFO L226 Difference]: Without dead ends: 188072 [2020-07-20 12:27:18,584 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 [2020-07-20 12:27:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188072 states. [2020-07-20 12:27:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188072 to 187685. [2020-07-20 12:27:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187685 states. [2020-07-20 12:27:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187685 states to 187685 states and 288769 transitions. [2020-07-20 12:27:23,424 INFO L78 Accepts]: Start accepts. Automaton has 187685 states and 288769 transitions. Word has length 255 [2020-07-20 12:27:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:27:23,424 INFO L479 AbstractCegarLoop]: Abstraction has 187685 states and 288769 transitions. [2020-07-20 12:27:23,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:27:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 187685 states and 288769 transitions. [2020-07-20 12:27:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:27:23,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:27:23,427 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] [2020-07-20 12:27:23,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:23,641 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:27:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:27:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2000899464, now seen corresponding path program 1 times [2020-07-20 12:27:23,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:27:23,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283526794] [2020-07-20 12:27:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:27:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:27:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:27:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:27:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:27:24,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:27:24,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283526794] [2020-07-20 12:27:24,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:27:24,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:27:24,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217825057] [2020-07-20 12:27:24,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:27:24,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:27:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:27:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:24,028 INFO L87 Difference]: Start difference. First operand 187685 states and 288769 transitions. Second operand 3 states. [2020-07-20 12:27:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:36,063 INFO L93 Difference]: Finished difference Result 561708 states and 908092 transitions. [2020-07-20 12:27:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:27:36,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 12:27:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:37,444 INFO L225 Difference]: With dead ends: 561708 [2020-07-20 12:27:37,444 INFO L226 Difference]: Without dead ends: 374056 [2020-07-20 12:27:38,408 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 [2020-07-20 12:27:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374056 states. [2020-07-20 12:28:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374056 to 373285. [2020-07-20 12:28:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-20 12:28:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 589723 transitions. [2020-07-20 12:28:12,457 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 589723 transitions. Word has length 255 [2020-07-20 12:28:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:28:12,458 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 589723 transitions. [2020-07-20 12:28:12,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:28:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 589723 transitions. [2020-07-20 12:28:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:28:12,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:28:12,460 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] [2020-07-20 12:28:12,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:12,674 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:28:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:28:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash 94415271, now seen corresponding path program 1 times [2020-07-20 12:28:12,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:28:12,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126506194] [2020-07-20 12:28:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:28:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:28:12,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:28:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:28:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:28:13,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:28:13,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126506194] [2020-07-20 12:28:13,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:28:13,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:28:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34285152] [2020-07-20 12:28:13,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:28:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:28:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:28:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:28:13,077 INFO L87 Difference]: Start difference. First operand 373285 states and 589723 transitions. Second operand 5 states. [2020-07-20 12:28:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:28:35,161 INFO L93 Difference]: Finished difference Result 746538 states and 1181706 transitions. [2020-07-20 12:28:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:28:35,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:28:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:28:36,753 INFO L225 Difference]: With dead ends: 746538 [2020-07-20 12:28:36,753 INFO L226 Difference]: Without dead ends: 373285 [2020-07-20 12:28:39,103 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 [2020-07-20 12:28:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373285 states. [2020-07-20 12:29:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373285 to 373285. [2020-07-20 12:29:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-20 12:29:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 587419 transitions. [2020-07-20 12:29:14,600 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 587419 transitions. Word has length 255 [2020-07-20 12:29:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:29:14,601 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 587419 transitions. [2020-07-20 12:29:14,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:29:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 587419 transitions. [2020-07-20 12:29:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:29:14,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:29:14,602 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] [2020-07-20 12:29:14,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:29:14,811 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:29:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:29:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1147527449, now seen corresponding path program 1 times [2020-07-20 12:29:14,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:29:14,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728479958] [2020-07-20 12:29:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:29:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:29:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:29:15,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:29:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:29:15,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:29:15,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728479958] [2020-07-20 12:29:15,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:29:15,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:29:15,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230883642] [2020-07-20 12:29:15,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:29:15,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:29:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:29:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:29:15,225 INFO L87 Difference]: Start difference. First operand 373285 states and 587419 transitions. Second operand 5 states. [2020-07-20 12:29:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:29:47,267 INFO L93 Difference]: Finished difference Result 832747 states and 1453428 transitions. [2020-07-20 12:29:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:29:47,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:29:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:29:49,417 INFO L225 Difference]: With dead ends: 832747 [2020-07-20 12:29:49,417 INFO L226 Difference]: Without dead ends: 459494 [2020-07-20 12:30:07,252 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 [2020-07-20 12:30:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459494 states. [2020-07-20 12:30:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459494 to 433253. [2020-07-20 12:30:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-20 12:30:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 658139 transitions. [2020-07-20 12:30:43,133 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 658139 transitions. Word has length 255 [2020-07-20 12:30:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:30:43,133 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 658139 transitions. [2020-07-20 12:30:43,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:30:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 658139 transitions. [2020-07-20 12:30:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:30:43,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:30:43,136 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] [2020-07-20 12:30:43,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:30:43,337 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:30:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:30:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1292685735, now seen corresponding path program 1 times [2020-07-20 12:30:43,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:30:43,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233563249] [2020-07-20 12:30:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:30:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:30:43,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:30:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:30:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:30:44,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:30:44,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233563249] [2020-07-20 12:30:44,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:30:44,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:30:44,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928043471] [2020-07-20 12:30:44,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:30:44,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:30:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:30:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:30:44,524 INFO L87 Difference]: Start difference. First operand 433253 states and 658139 transitions. Second operand 5 states. [2020-07-20 12:31:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:31:14,781 INFO L93 Difference]: Finished difference Result 866474 states and 1318538 transitions. [2020-07-20 12:31:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:31:14,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:31:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:31:17,315 INFO L225 Difference]: With dead ends: 866474 [2020-07-20 12:31:17,316 INFO L226 Difference]: Without dead ends: 433253 [2020-07-20 12:31:18,839 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 [2020-07-20 12:31:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-20 12:31:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-20 12:31:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-20 12:31:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 655835 transitions. [2020-07-20 12:31:55,482 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 655835 transitions. Word has length 255 [2020-07-20 12:31:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:55,483 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 655835 transitions. [2020-07-20 12:31:55,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:31:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 655835 transitions. [2020-07-20 12:31:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:31:55,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:55,485 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] [2020-07-20 12:31:55,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:55,693 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1050503449, now seen corresponding path program 1 times [2020-07-20 12:31:55,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:55,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233724284] [2020-07-20 12:31:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:31:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:31:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:56,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:56,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233724284] [2020-07-20 12:31:56,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:56,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:31:56,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137262780] [2020-07-20 12:31:56,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:31:56,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:31:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:31:56,132 INFO L87 Difference]: Start difference. First operand 433253 states and 655835 transitions. Second operand 5 states. [2020-07-20 12:32:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:24,769 INFO L93 Difference]: Finished difference Result 866474 states and 1313930 transitions. [2020-07-20 12:32:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:32:24,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:32:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:27,923 INFO L225 Difference]: With dead ends: 866474 [2020-07-20 12:32:27,924 INFO L226 Difference]: Without dead ends: 433253 [2020-07-20 12:32:29,252 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 [2020-07-20 12:32:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-20 12:33:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-20 12:33:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-20 12:33:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 653531 transitions. [2020-07-20 12:33:05,054 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 653531 transitions. Word has length 255 [2020-07-20 12:33:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:05,054 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 653531 transitions. [2020-07-20 12:33:05,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:33:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 653531 transitions. [2020-07-20 12:33:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:33:05,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:05,056 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] [2020-07-20 12:33:05,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:05,257 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:05,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1264637529, now seen corresponding path program 1 times [2020-07-20 12:33:05,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:05,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330493063] [2020-07-20 12:33:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:33:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:33:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:06,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:06,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330493063] [2020-07-20 12:33:06,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:06,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:33:06,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497542659] [2020-07-20 12:33:06,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:33:06,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:33:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:33:06,489 INFO L87 Difference]: Start difference. First operand 433253 states and 653531 transitions. Second operand 5 states. [2020-07-20 12:33:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:37,325 INFO L93 Difference]: Finished difference Result 866474 states and 1309322 transitions. [2020-07-20 12:33:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:33:37,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:33:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:40,780 INFO L225 Difference]: With dead ends: 866474 [2020-07-20 12:33:40,780 INFO L226 Difference]: Without dead ends: 433253 [2020-07-20 12:33:43,803 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 [2020-07-20 12:33:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-20 12:34:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-20 12:34:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-20 12:34:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 651227 transitions. [2020-07-20 12:34:20,953 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 651227 transitions. Word has length 255 [2020-07-20 12:34:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:34:20,953 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 651227 transitions. [2020-07-20 12:34:20,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:34:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 651227 transitions. [2020-07-20 12:34:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:34:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:34:20,955 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] [2020-07-20 12:34:21,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:21,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:34:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:34:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1238735975, now seen corresponding path program 1 times [2020-07-20 12:34:21,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:34:21,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621949805] [2020-07-20 12:34:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:34:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:34:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:34:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:34:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:34:21,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:34:21,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621949805] [2020-07-20 12:34:21,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:34:21,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:34:21,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050099323] [2020-07-20 12:34:21,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:34:21,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:34:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:34:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:34:21,532 INFO L87 Difference]: Start difference. First operand 433253 states and 651227 transitions. Second operand 5 states. [2020-07-20 12:35:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:35:07,479 INFO L93 Difference]: Finished difference Result 952683 states and 1581748 transitions. [2020-07-20 12:35:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:35:07,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 12:35:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:35:09,582 INFO L225 Difference]: With dead ends: 952683 [2020-07-20 12:35:09,583 INFO L226 Difference]: Without dead ends: 519462 [2020-07-20 12:35:29,946 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 [2020-07-20 12:35:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519462 states. [2020-07-20 12:35:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519462 to 493221. [2020-07-20 12:35:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493221 states. [2020-07-20 12:35:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493221 states to 493221 states and 721179 transitions. [2020-07-20 12:35:57,264 INFO L78 Accepts]: Start accepts. Automaton has 493221 states and 721179 transitions. Word has length 255 [2020-07-20 12:35:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:57,265 INFO L479 AbstractCegarLoop]: Abstraction has 493221 states and 721179 transitions. [2020-07-20 12:35:57,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:35:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 493221 states and 721179 transitions. [2020-07-20 12:35:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 12:35:57,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:57,266 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] [2020-07-20 12:35:57,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:57,468 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash 298422055, now seen corresponding path program 1 times [2020-07-20 12:35:57,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:57,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619231232] [2020-07-20 12:35:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 12:35:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:35:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:57,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:57,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619231232] [2020-07-20 12:35:57,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:57,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:35:57,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761959901] [2020-07-20 12:35:57,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:35:57,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:35:57,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:35:57,872 INFO L87 Difference]: Start difference. First operand 493221 states and 721179 transitions. Second operand 5 states.