/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:38:28,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:38:28,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:38:28,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:38:28,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:38:28,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:38:28,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:38:28,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:38:28,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:38:28,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:38:28,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:38:28,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:38:28,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:38:28,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:38:28,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:38:28,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:38:28,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:38:28,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:38:28,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:38:28,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:38:28,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:38:28,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:38:28,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:38:28,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:38:28,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:38:28,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:38:28,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:38:28,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:38:28,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:38:28,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:38:28,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:38:28,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:38:28,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:38:28,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:38:28,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:38:28,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:38:28,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:38:28,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:38:28,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:38:28,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:38:28,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:38:28,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:38:28,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:38:28,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:38:28,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:38:28,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:38:28,450 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:38:28,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:38:28,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:38:28,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:38:28,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:38:28,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:38:28,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:38:28,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:38:28,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:38:28,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:38:28,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:38:28,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:38:28,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:38:28,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:38:28,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:38:28,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:38:28,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:38:28,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:28,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:38:28,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:38:28,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:38:28,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:38:28,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:38:28,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:38:28,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:38:28,791 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:38:28,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 14:38:28,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf59c2bb/600f789a6cfb4d39aa7e72a9d7a3a6f5/FLAG8993b71d1 [2020-07-21 14:38:29,438 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:38:29,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 14:38:29,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf59c2bb/600f789a6cfb4d39aa7e72a9d7a3a6f5/FLAG8993b71d1 [2020-07-21 14:38:29,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faf59c2bb/600f789a6cfb4d39aa7e72a9d7a3a6f5 [2020-07-21 14:38:29,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:38:29,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:38:29,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:38:29,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:38:29,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:38:29,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:38:29" (1/1) ... [2020-07-21 14:38:29,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bb9df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:29, skipping insertion in model container [2020-07-21 14:38:29,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:38:29" (1/1) ... [2020-07-21 14:38:29,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:38:29,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:38:30,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:38:30,212 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:38:30,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:38:30,484 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:38:30,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30 WrapperNode [2020-07-21 14:38:30,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:38:30,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:38:30,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:38:30,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:38:30,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... [2020-07-21 14:38:30,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:38:30,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:38:30,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:38:30,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:38:30,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:38:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:38:30,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:38:30,710 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 14:38:30,710 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 14:38:30,711 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 14:38:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 14:38:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 14:38:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 14:38:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 14:38:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 14:38:30,713 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 14:38:30,713 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 14:38:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 14:38:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 14:38:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 14:38:30,717 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 14:38:30,717 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 14:38:30,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 14:38:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 14:38:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 14:38:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 14:38:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 14:38:30,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 14:38:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 14:38:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 14:38:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 14:38:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 14:38:30,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 14:38:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 14:38:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 14:38:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 14:38:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 14:38:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 14:38:30,722 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 14:38:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 14:38:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 14:38:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:38:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:38:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:38:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 14:38:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 14:38:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 14:38:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 14:38:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 14:38:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 14:38:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 14:38:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 14:38:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 14:38:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 14:38:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-21 14:38:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 14:38:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 14:38:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 14:38:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 14:38:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 14:38:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 14:38:30,731 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 14:38:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 14:38:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 14:38:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 14:38:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 14:38:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 14:38:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 14:38:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 14:38:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 14:38:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 14:38:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 14:38:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 14:38:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:38:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:38:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:38:31,940 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:38:31,941 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 14:38:31,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:38:31 BoogieIcfgContainer [2020-07-21 14:38:31,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:38:31,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:38:31,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:38:31,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:38:31,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:38:29" (1/3) ... [2020-07-21 14:38:31,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d98a367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:38:31, skipping insertion in model container [2020-07-21 14:38:31,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:30" (2/3) ... [2020-07-21 14:38:31,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d98a367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:38:31, skipping insertion in model container [2020-07-21 14:38:31,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:38:31" (3/3) ... [2020-07-21 14:38:31,958 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-21 14:38:31,969 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:38:31,978 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:38:31,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:38:32,022 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:38:32,022 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:38:32,022 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:38:32,022 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:38:32,022 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:38:32,023 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:38:32,023 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:38:32,023 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:38:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-21 14:38:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 14:38:32,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:32,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:32,080 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-21 14:38:32,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:32,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316841668] [2020-07-21 14:38:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:32,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:32,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:32,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:32,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316841668] [2020-07-21 14:38:32,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:32,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715426674] [2020-07-21 14:38:32,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:32,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:32,755 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-21 14:38:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:32,900 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-21 14:38:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:32,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 14:38:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:32,947 INFO L225 Difference]: With dead ends: 1034 [2020-07-21 14:38:32,947 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 14:38:32,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 14:38:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 14:38:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 14:38:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-21 14:38:33,061 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-21 14:38:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:33,063 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-21 14:38:33,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-21 14:38:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 14:38:33,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:33,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:33,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:33,285 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:33,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-21 14:38:33,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:33,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611025447] [2020-07-21 14:38:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:33,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:33,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:33,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:33,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611025447] [2020-07-21 14:38:33,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:33,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:33,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610415421] [2020-07-21 14:38:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:33,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:33,715 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-21 14:38:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:33,765 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-21 14:38:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:33,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 14:38:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:33,769 INFO L225 Difference]: With dead ends: 1010 [2020-07-21 14:38:33,770 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 14:38:33,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 14:38:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 14:38:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 14:38:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-21 14:38:33,833 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-21 14:38:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-21 14:38:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-21 14:38:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 14:38:33,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:33,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:34,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:34,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-21 14:38:34,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:34,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171334085] [2020-07-21 14:38:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:34,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:34,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:34,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:34,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171334085] [2020-07-21 14:38:34,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:34,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:34,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733698384] [2020-07-21 14:38:34,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:34,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:34,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:34,408 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-21 14:38:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:34,500 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-21 14:38:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:34,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 14:38:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:34,511 INFO L225 Difference]: With dead ends: 1479 [2020-07-21 14:38:34,511 INFO L226 Difference]: Without dead ends: 996 [2020-07-21 14:38:34,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-21 14:38:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-21 14:38:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-21 14:38:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-21 14:38:34,626 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-21 14:38:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:34,630 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-21 14:38:34,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-21 14:38:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:34,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:34,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:34,856 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-21 14:38:34,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:34,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820820101] [2020-07-21 14:38:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:35,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:35,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820820101] [2020-07-21 14:38:35,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:35,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:35,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758065399] [2020-07-21 14:38:35,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:35,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:35,365 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 3 states. [2020-07-21 14:38:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:35,479 INFO L93 Difference]: Finished difference Result 2854 states and 4374 transitions. [2020-07-21 14:38:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:35,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:35,493 INFO L225 Difference]: With dead ends: 2854 [2020-07-21 14:38:35,493 INFO L226 Difference]: Without dead ends: 1915 [2020-07-21 14:38:35,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-07-21 14:38:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1908. [2020-07-21 14:38:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-07-21 14:38:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2868 transitions. [2020-07-21 14:38:35,611 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2868 transitions. Word has length 255 [2020-07-21 14:38:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:35,612 INFO L479 AbstractCegarLoop]: Abstraction has 1908 states and 2868 transitions. [2020-07-21 14:38:35,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2868 transitions. [2020-07-21 14:38:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:35,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:35,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:35,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:35,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1424231433, now seen corresponding path program 1 times [2020-07-21 14:38:35,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:35,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696926263] [2020-07-21 14:38:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:36,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:36,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:36,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:36,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:36,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696926263] [2020-07-21 14:38:36,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:36,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:36,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469543973] [2020-07-21 14:38:36,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:36,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:36,248 INFO L87 Difference]: Start difference. First operand 1908 states and 2868 transitions. Second operand 3 states. [2020-07-21 14:38:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:36,466 INFO L93 Difference]: Finished difference Result 5612 states and 8630 transitions. [2020-07-21 14:38:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:36,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:36,493 INFO L225 Difference]: With dead ends: 5612 [2020-07-21 14:38:36,494 INFO L226 Difference]: Without dead ends: 3755 [2020-07-21 14:38:36,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2020-07-21 14:38:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3746. [2020-07-21 14:38:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3746 states. [2020-07-21 14:38:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 5635 transitions. [2020-07-21 14:38:36,722 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 5635 transitions. Word has length 255 [2020-07-21 14:38:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:36,722 INFO L479 AbstractCegarLoop]: Abstraction has 3746 states and 5635 transitions. [2020-07-21 14:38:36,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 5635 transitions. [2020-07-21 14:38:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:36,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:36,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:36,942 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1615137816, now seen corresponding path program 1 times [2020-07-21 14:38:36,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:36,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320444286] [2020-07-21 14:38:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:37,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:37,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:37,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:37,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320444286] [2020-07-21 14:38:37,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:37,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:37,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344603293] [2020-07-21 14:38:37,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:37,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:37,438 INFO L87 Difference]: Start difference. First operand 3746 states and 5635 transitions. Second operand 3 states. [2020-07-21 14:38:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:37,674 INFO L93 Difference]: Finished difference Result 11086 states and 17062 transitions. [2020-07-21 14:38:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:37,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:37,721 INFO L225 Difference]: With dead ends: 11086 [2020-07-21 14:38:37,721 INFO L226 Difference]: Without dead ends: 7391 [2020-07-21 14:38:37,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2020-07-21 14:38:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 7372. [2020-07-21 14:38:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7372 states. [2020-07-21 14:38:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 11119 transitions. [2020-07-21 14:38:38,132 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 11119 transitions. Word has length 255 [2020-07-21 14:38:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:38,133 INFO L479 AbstractCegarLoop]: Abstraction has 7372 states and 11119 transitions. [2020-07-21 14:38:38,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 11119 transitions. [2020-07-21 14:38:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:38,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:38,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:38,355 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash -102323093, now seen corresponding path program 1 times [2020-07-21 14:38:38,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:38,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390935771] [2020-07-21 14:38:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:38,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:38,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:38,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:38,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390935771] [2020-07-21 14:38:38,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:38,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:38,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857855996] [2020-07-21 14:38:38,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:38,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:38,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:38,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:38,779 INFO L87 Difference]: Start difference. First operand 7372 states and 11119 transitions. Second operand 3 states. [2020-07-21 14:38:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:38,983 INFO L93 Difference]: Finished difference Result 13472 states and 20082 transitions. [2020-07-21 14:38:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:38,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:39,026 INFO L225 Difference]: With dead ends: 13472 [2020-07-21 14:38:39,026 INFO L226 Difference]: Without dead ends: 6133 [2020-07-21 14:38:39,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2020-07-21 14:38:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 6133. [2020-07-21 14:38:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6133 states. [2020-07-21 14:38:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9011 transitions. [2020-07-21 14:38:39,380 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9011 transitions. Word has length 255 [2020-07-21 14:38:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:39,381 INFO L479 AbstractCegarLoop]: Abstraction has 6133 states and 9011 transitions. [2020-07-21 14:38:39,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9011 transitions. [2020-07-21 14:38:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:39,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:39,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:39,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:39,601 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash -454979607, now seen corresponding path program 1 times [2020-07-21 14:38:39,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:39,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487879482] [2020-07-21 14:38:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:40,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:40,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:40,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:40,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487879482] [2020-07-21 14:38:40,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:40,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:40,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689901827] [2020-07-21 14:38:40,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:40,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:40,127 INFO L87 Difference]: Start difference. First operand 6133 states and 9011 transitions. Second operand 3 states. [2020-07-21 14:38:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:40,436 INFO L93 Difference]: Finished difference Result 18256 states and 27394 transitions. [2020-07-21 14:38:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:40,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:40,503 INFO L225 Difference]: With dead ends: 18256 [2020-07-21 14:38:40,503 INFO L226 Difference]: Without dead ends: 12156 [2020-07-21 14:38:40,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2020-07-21 14:38:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 12129. [2020-07-21 14:38:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12129 states. [2020-07-21 14:38:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12129 states to 12129 states and 17881 transitions. [2020-07-21 14:38:41,115 INFO L78 Accepts]: Start accepts. Automaton has 12129 states and 17881 transitions. Word has length 255 [2020-07-21 14:38:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:41,116 INFO L479 AbstractCegarLoop]: Abstraction has 12129 states and 17881 transitions. [2020-07-21 14:38:41,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 12129 states and 17881 transitions. [2020-07-21 14:38:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:41,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:41,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:41,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:41,335 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash -167519702, now seen corresponding path program 1 times [2020-07-21 14:38:41,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:41,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981554505] [2020-07-21 14:38:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:41,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:41,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:41,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:41,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981554505] [2020-07-21 14:38:41,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:41,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:41,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782730392] [2020-07-21 14:38:41,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:41,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:41,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:41,748 INFO L87 Difference]: Start difference. First operand 12129 states and 17881 transitions. Second operand 3 states. [2020-07-21 14:38:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:42,437 INFO L93 Difference]: Finished difference Result 36240 states and 54724 transitions. [2020-07-21 14:38:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:42,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:42,553 INFO L225 Difference]: With dead ends: 36240 [2020-07-21 14:38:42,553 INFO L226 Difference]: Without dead ends: 24144 [2020-07-21 14:38:42,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24144 states. [2020-07-21 14:38:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24144 to 24093. [2020-07-21 14:38:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24093 states. [2020-07-21 14:38:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24093 states to 24093 states and 35707 transitions. [2020-07-21 14:38:44,474 INFO L78 Accepts]: Start accepts. Automaton has 24093 states and 35707 transitions. Word has length 255 [2020-07-21 14:38:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:44,474 INFO L479 AbstractCegarLoop]: Abstraction has 24093 states and 35707 transitions. [2020-07-21 14:38:44,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 24093 states and 35707 transitions. [2020-07-21 14:38:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:44,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:44,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:44,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:44,693 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash 970109163, now seen corresponding path program 1 times [2020-07-21 14:38:44,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:44,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338719346] [2020-07-21 14:38:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:45,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:45,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:45,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338719346] [2020-07-21 14:38:45,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:45,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:45,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734693238] [2020-07-21 14:38:45,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:45,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:45,092 INFO L87 Difference]: Start difference. First operand 24093 states and 35707 transitions. Second operand 3 states. [2020-07-21 14:38:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:46,374 INFO L93 Difference]: Finished difference Result 71908 states and 109422 transitions. [2020-07-21 14:38:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:46,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:46,648 INFO L225 Difference]: With dead ends: 71908 [2020-07-21 14:38:46,649 INFO L226 Difference]: Without dead ends: 47848 [2020-07-21 14:38:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47848 states. [2020-07-21 14:38:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47848 to 47749. [2020-07-21 14:38:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47749 states. [2020-07-21 14:38:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47749 states to 47749 states and 71321 transitions. [2020-07-21 14:38:48,395 INFO L78 Accepts]: Start accepts. Automaton has 47749 states and 71321 transitions. Word has length 255 [2020-07-21 14:38:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:48,396 INFO L479 AbstractCegarLoop]: Abstraction has 47749 states and 71321 transitions. [2020-07-21 14:38:48,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 47749 states and 71321 transitions. [2020-07-21 14:38:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:48,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:48,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:48,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:48,600 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1325705610, now seen corresponding path program 1 times [2020-07-21 14:38:48,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:48,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510262781] [2020-07-21 14:38:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:50,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:50,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:50,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510262781] [2020-07-21 14:38:50,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:50,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:50,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147974022] [2020-07-21 14:38:50,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:50,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:50,248 INFO L87 Difference]: Start difference. First operand 47749 states and 71321 transitions. Second operand 3 states. [2020-07-21 14:38:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:52,615 INFO L93 Difference]: Finished difference Result 142572 states and 219668 transitions. [2020-07-21 14:38:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:52,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:38:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:53,027 INFO L225 Difference]: With dead ends: 142572 [2020-07-21 14:38:53,027 INFO L226 Difference]: Without dead ends: 94856 [2020-07-21 14:38:53,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94856 states. [2020-07-21 14:38:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94856 to 94661. [2020-07-21 14:38:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94661 states. [2020-07-21 14:38:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94661 states to 94661 states and 143075 transitions. [2020-07-21 14:38:58,293 INFO L78 Accepts]: Start accepts. Automaton has 94661 states and 143075 transitions. Word has length 255 [2020-07-21 14:38:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:58,294 INFO L479 AbstractCegarLoop]: Abstraction has 94661 states and 143075 transitions. [2020-07-21 14:38:58,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 94661 states and 143075 transitions. [2020-07-21 14:38:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:38:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:58,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:58,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:58,497 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:58,498 INFO L82 PathProgramCache]: Analyzing trace with hash 48552937, now seen corresponding path program 1 times [2020-07-21 14:38:58,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:58,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686124954] [2020-07-21 14:38:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:58,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:58,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:58,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686124954] [2020-07-21 14:38:58,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:58,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:58,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102992141] [2020-07-21 14:38:58,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:58,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:58,897 INFO L87 Difference]: Start difference. First operand 94661 states and 143075 transitions. Second operand 3 states. [2020-07-21 14:39:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:39:05,768 INFO L93 Difference]: Finished difference Result 282700 states and 443878 transitions. [2020-07-21 14:39:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:39:05,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:39:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:39:06,877 INFO L225 Difference]: With dead ends: 282700 [2020-07-21 14:39:06,877 INFO L226 Difference]: Without dead ends: 188072 [2020-07-21 14:39:07,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:39:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188072 states. [2020-07-21 14:39:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188072 to 187685. [2020-07-21 14:39:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187685 states. [2020-07-21 14:39:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187685 states to 187685 states and 288769 transitions. [2020-07-21 14:39:15,647 INFO L78 Accepts]: Start accepts. Automaton has 187685 states and 288769 transitions. Word has length 255 [2020-07-21 14:39:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:39:15,647 INFO L479 AbstractCegarLoop]: Abstraction has 187685 states and 288769 transitions. [2020-07-21 14:39:15,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:39:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 187685 states and 288769 transitions. [2020-07-21 14:39:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:39:15,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:39:15,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:39:15,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:15,863 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:39:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:39:15,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2000899464, now seen corresponding path program 1 times [2020-07-21 14:39:15,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:39:15,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700052434] [2020-07-21 14:39:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:16,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:39:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:39:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:39:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:39:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:39:16,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:39:16,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700052434] [2020-07-21 14:39:16,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:39:16,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:39:16,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36078593] [2020-07-21 14:39:16,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:39:16,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:39:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:39:16,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:39:16,268 INFO L87 Difference]: Start difference. First operand 187685 states and 288769 transitions. Second operand 3 states. [2020-07-21 14:39:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:39:34,318 INFO L93 Difference]: Finished difference Result 561708 states and 908092 transitions. [2020-07-21 14:39:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:39:34,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 14:39:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:39:35,603 INFO L225 Difference]: With dead ends: 561708 [2020-07-21 14:39:35,603 INFO L226 Difference]: Without dead ends: 374056 [2020-07-21 14:39:36,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:39:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374056 states. [2020-07-21 14:39:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374056 to 373285. [2020-07-21 14:39:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-21 14:39:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 589723 transitions. [2020-07-21 14:39:58,566 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 589723 transitions. Word has length 255 [2020-07-21 14:39:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:39:58,566 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 589723 transitions. [2020-07-21 14:39:58,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:39:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 589723 transitions. [2020-07-21 14:39:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:39:58,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:39:58,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:39:58,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:58,777 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:39:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:39:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 94415271, now seen corresponding path program 1 times [2020-07-21 14:39:58,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:39:58,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787328994] [2020-07-21 14:39:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:59,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:39:59,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:39:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:39:59,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:39:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:39:59,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:39:59,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787328994] [2020-07-21 14:39:59,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:39:59,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:39:59,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586232182] [2020-07-21 14:39:59,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:39:59,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:39:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:39:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:39:59,195 INFO L87 Difference]: Start difference. First operand 373285 states and 589723 transitions. Second operand 5 states. [2020-07-21 14:40:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:40:21,401 INFO L93 Difference]: Finished difference Result 746538 states and 1181706 transitions. [2020-07-21 14:40:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:40:21,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:40:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:40:23,027 INFO L225 Difference]: With dead ends: 746538 [2020-07-21 14:40:23,027 INFO L226 Difference]: Without dead ends: 373285 [2020-07-21 14:40:25,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:40:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373285 states. [2020-07-21 14:40:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373285 to 373285. [2020-07-21 14:40:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-21 14:41:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 587419 transitions. [2020-07-21 14:41:00,580 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 587419 transitions. Word has length 255 [2020-07-21 14:41:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:00,580 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 587419 transitions. [2020-07-21 14:41:00,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:41:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 587419 transitions. [2020-07-21 14:41:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:41:00,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:00,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:00,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:00,797 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1147527449, now seen corresponding path program 1 times [2020-07-21 14:41:00,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:00,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494121653] [2020-07-21 14:41:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:01,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:41:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:41:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:01,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:01,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494121653] [2020-07-21 14:41:01,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:01,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:41:01,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572591776] [2020-07-21 14:41:01,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:41:01,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:41:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:41:01,211 INFO L87 Difference]: Start difference. First operand 373285 states and 587419 transitions. Second operand 5 states. [2020-07-21 14:41:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:34,729 INFO L93 Difference]: Finished difference Result 832747 states and 1453428 transitions. [2020-07-21 14:41:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:41:34,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:41:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:36,840 INFO L225 Difference]: With dead ends: 832747 [2020-07-21 14:41:36,841 INFO L226 Difference]: Without dead ends: 459494 [2020-07-21 14:41:54,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:41:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459494 states. [2020-07-21 14:42:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459494 to 433253. [2020-07-21 14:42:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 14:42:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 658139 transitions. [2020-07-21 14:42:31,025 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 658139 transitions. Word has length 255 [2020-07-21 14:42:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:31,026 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 658139 transitions. [2020-07-21 14:42:31,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:42:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 658139 transitions. [2020-07-21 14:42:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:42:31,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:31,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:31,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:31,229 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1292685735, now seen corresponding path program 1 times [2020-07-21 14:42:31,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:31,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059424065] [2020-07-21 14:42:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:32,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:42:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:42:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:42:32,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:32,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059424065] [2020-07-21 14:42:32,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:32,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:42:32,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650645848] [2020-07-21 14:42:32,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:42:32,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:42:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:42:32,574 INFO L87 Difference]: Start difference. First operand 433253 states and 658139 transitions. Second operand 5 states. [2020-07-21 14:43:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:01,005 INFO L93 Difference]: Finished difference Result 866474 states and 1318538 transitions. [2020-07-21 14:43:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:01,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:43:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:02,704 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 14:43:02,704 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 14:43:05,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:43:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-21 14:43:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-21 14:43:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 14:43:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 655835 transitions. [2020-07-21 14:43:55,370 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 655835 transitions. Word has length 255 [2020-07-21 14:43:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:55,371 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 655835 transitions. [2020-07-21 14:43:55,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:43:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 655835 transitions. [2020-07-21 14:43:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:43:55,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:55,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:55,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:55,589 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1050503449, now seen corresponding path program 1 times [2020-07-21 14:43:55,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:55,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656068317] [2020-07-21 14:43:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:55,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:43:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:55,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:55,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656068317] [2020-07-21 14:43:55,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:55,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:43:55,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592238591] [2020-07-21 14:43:55,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:43:55,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:43:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:55,985 INFO L87 Difference]: Start difference. First operand 433253 states and 655835 transitions. Second operand 5 states. [2020-07-21 14:44:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:18,129 INFO L93 Difference]: Finished difference Result 866474 states and 1313930 transitions. [2020-07-21 14:44:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:44:18,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:44:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:21,362 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 14:44:21,362 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 14:44:24,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:44:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-21 14:44:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-21 14:44:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 14:44:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 653531 transitions. [2020-07-21 14:44:56,868 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 653531 transitions. Word has length 255 [2020-07-21 14:44:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:56,868 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 653531 transitions. [2020-07-21 14:44:56,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:44:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 653531 transitions. [2020-07-21 14:44:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:44:56,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:56,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:57,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:57,071 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1264637529, now seen corresponding path program 1 times [2020-07-21 14:44:57,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:57,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807157237] [2020-07-21 14:44:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:58,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:44:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:44:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:58,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:58,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807157237] [2020-07-21 14:44:58,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:58,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:44:58,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500234487] [2020-07-21 14:44:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:44:58,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:44:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:44:58,401 INFO L87 Difference]: Start difference. First operand 433253 states and 653531 transitions. Second operand 5 states. [2020-07-21 14:45:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:28,790 INFO L93 Difference]: Finished difference Result 866474 states and 1309322 transitions. [2020-07-21 14:45:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:45:28,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:45:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:32,021 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 14:45:32,022 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 14:45:35,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:45:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-21 14:46:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-21 14:46:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 14:46:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 651227 transitions. [2020-07-21 14:46:14,073 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 651227 transitions. Word has length 255 [2020-07-21 14:46:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:14,074 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 651227 transitions. [2020-07-21 14:46:14,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:46:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 651227 transitions. [2020-07-21 14:46:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:46:14,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:14,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:14,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,290 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1238735975, now seen corresponding path program 1 times [2020-07-21 14:46:14,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:14,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213579120] [2020-07-21 14:46:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:46:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:14,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:14,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213579120] [2020-07-21 14:46:14,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:14,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:46:14,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860019662] [2020-07-21 14:46:14,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:46:14,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:46:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:14,702 INFO L87 Difference]: Start difference. First operand 433253 states and 651227 transitions. Second operand 5 states. [2020-07-21 14:46:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:59,180 INFO L93 Difference]: Finished difference Result 952683 states and 1581748 transitions. [2020-07-21 14:46:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:59,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 14:46:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:02,712 INFO L225 Difference]: With dead ends: 952683 [2020-07-21 14:47:02,712 INFO L226 Difference]: Without dead ends: 519462 [2020-07-21 14:47:23,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:47:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519462 states. [2020-07-21 14:47:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519462 to 493221. [2020-07-21 14:47:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493221 states. [2020-07-21 14:47:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493221 states to 493221 states and 721179 transitions. [2020-07-21 14:47:50,272 INFO L78 Accepts]: Start accepts. Automaton has 493221 states and 721179 transitions. Word has length 255 [2020-07-21 14:47:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:50,273 INFO L479 AbstractCegarLoop]: Abstraction has 493221 states and 721179 transitions. [2020-07-21 14:47:50,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:47:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 493221 states and 721179 transitions. [2020-07-21 14:47:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 14:47:50,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:50,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:50,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:50,475 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash 298422055, now seen corresponding path program 1 times [2020-07-21 14:47:50,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:50,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485388212] [2020-07-21 14:47:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:50,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:50,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:47:50,809 INFO L286 TraceCheckSpWp]: Computing forward predicates...