/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:16:00,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:16:00,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:16:00,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:16:00,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:16:00,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:16:00,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:16:00,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:16:00,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:16:00,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:16:00,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:16:00,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:16:00,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:16:00,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:16:00,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:16:00,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:16:00,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:16:00,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:16:00,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:16:00,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:16:00,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:16:00,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:16:00,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:16:00,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:16:00,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:16:00,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:16:00,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:16:00,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:16:00,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:16:00,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:16:00,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:16:00,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:16:00,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:16:00,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:16:00,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:16:00,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:16:00,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:16:00,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:16:00,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:16:00,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:16:00,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:16:00,474 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 12:16:00,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:16:00,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:16:00,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:16:00,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:16:00,493 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:16:00,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:16:00,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:16:00,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:16:00,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:16:00,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:16:00,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:16:00,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:16:00,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:16:00,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:16:00,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:16:00,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:16:00,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:16:00,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:16:00,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:16:00,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:16:00,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:16:00,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:16:00,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:16:00,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:16:00,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:16:00,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:16:00,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:00,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:16:00,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:16:00,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:16:00,771 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:16:00,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:16:00,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:16:00,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:16:00,789 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:16:00,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 12:16:00,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cffd8d8/43cd72437e4d4d0fbfd619355a5c4566/FLAG72b8fe08c [2020-07-21 12:16:01,416 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:16:01,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 12:16:01,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cffd8d8/43cd72437e4d4d0fbfd619355a5c4566/FLAG72b8fe08c [2020-07-21 12:16:01,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cffd8d8/43cd72437e4d4d0fbfd619355a5c4566 [2020-07-21 12:16:01,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:16:01,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:16:01,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:16:01,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:16:01,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:16:01,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:16:01" (1/1) ... [2020-07-21 12:16:01,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0b6dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:01, skipping insertion in model container [2020-07-21 12:16:01,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:16:01" (1/1) ... [2020-07-21 12:16:01,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:16:01,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:16:02,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:16:02,154 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:16:02,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:16:02,414 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:16:02,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02 WrapperNode [2020-07-21 12:16:02,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:16:02,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:16:02,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:16:02,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:16:02,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (1/1) ... [2020-07-21 12:16:02,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:16:02,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:16:02,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:16:02,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:16:02,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (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 12:16:02,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 12:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 12:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 12:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 12:16:02,595 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 12:16:02,595 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 12:16:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 12:16:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 12:16:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 12:16:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 12:16:02,597 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 12:16:02,597 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 12:16:02,597 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 12:16:02,598 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 12:16:02,598 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 12:16:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 12:16:02,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 12:16:02,601 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 12:16:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 12:16:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 12:16:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 12:16:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 12:16:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 12:16:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 12:16:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 12:16:02,603 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 12:16:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 12:16:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 12:16:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 12:16:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 12:16:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:16:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:16:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:16:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 12:16:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 12:16:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 12:16:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 12:16:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 12:16:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 12:16:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 12:16:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 12:16:02,610 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 12:16:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 12:16:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 12:16:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 12:16:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 12:16:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 12:16:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 12:16:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 12:16:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 12:16:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 12:16:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 12:16:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 12:16:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 12:16:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:16:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:16:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:16:03,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:16:03,912 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 12:16:03,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:16:03 BoogieIcfgContainer [2020-07-21 12:16:03,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:16:03,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:16:03,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:16:03,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:16:03,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:16:01" (1/3) ... [2020-07-21 12:16:03,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc0b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:16:03, skipping insertion in model container [2020-07-21 12:16:03,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:02" (2/3) ... [2020-07-21 12:16:03,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc0b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:16:03, skipping insertion in model container [2020-07-21 12:16:03,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:16:03" (3/3) ... [2020-07-21 12:16:03,930 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-21 12:16:03,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:16:03,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:16:03,962 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:16:03,986 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:16:03,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:16:03,987 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:16:03,987 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:16:03,987 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:16:03,987 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:16:03,987 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:16:03,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:16:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-21 12:16:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 12:16:04,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:04,048 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] [2020-07-21 12:16:04,048 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-21 12:16:04,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:04,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964473788] [2020-07-21 12:16:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:04,704 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 12:16:04,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:04,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964473788] [2020-07-21 12:16:04,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:04,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:04,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659759561] [2020-07-21 12:16:04,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:04,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:04,733 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-21 12:16:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:04,849 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-21 12:16:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:04,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 12:16:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:04,872 INFO L225 Difference]: With dead ends: 981 [2020-07-21 12:16:04,872 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 12:16:04,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 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 12:16:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 12:16:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 12:16:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 12:16:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-21 12:16:04,975 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-21 12:16:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:04,977 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-21 12:16:04,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-21 12:16:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 12:16:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:04,992 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] [2020-07-21 12:16:05,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:05,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-21 12:16:05,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:05,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586923702] [2020-07-21 12:16:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:05,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:05,632 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 12:16:05,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:05,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586923702] [2020-07-21 12:16:05,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:05,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:05,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974258628] [2020-07-21 12:16:05,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:05,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:05,637 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-21 12:16:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:05,733 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-21 12:16:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:05,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 12:16:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:05,739 INFO L225 Difference]: With dead ends: 957 [2020-07-21 12:16:05,739 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 12:16:05,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 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 12:16:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 12:16:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 12:16:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 12:16:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-21 12:16:05,778 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-21 12:16:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:05,779 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-21 12:16:05,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-21 12:16:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 12:16:05,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:05,784 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] [2020-07-21 12:16:05,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:05,999 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-21 12:16:06,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:06,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539179054] [2020-07-21 12:16:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:06,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:06,381 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 12:16:06,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:06,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539179054] [2020-07-21 12:16:06,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:06,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:06,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702441404] [2020-07-21 12:16:06,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:06,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:06,385 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-21 12:16:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:06,513 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-21 12:16:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:06,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 12:16:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:06,521 INFO L225 Difference]: With dead ends: 1382 [2020-07-21 12:16:06,521 INFO L226 Difference]: Without dead ends: 925 [2020-07-21 12:16:06,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 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 12:16:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-21 12:16:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-21 12:16:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-21 12:16:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-21 12:16:06,576 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-21 12:16:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:06,577 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-21 12:16:06,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-21 12:16:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:06,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:06,581 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] [2020-07-21 12:16:06,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:06,796 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-21 12:16:06,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:06,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540712046] [2020-07-21 12:16:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:07,222 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 12:16:07,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:07,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540712046] [2020-07-21 12:16:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:07,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:07,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007586730] [2020-07-21 12:16:07,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:07,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:07,229 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 3 states. [2020-07-21 12:16:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:07,329 INFO L93 Difference]: Finished difference Result 2680 states and 4099 transitions. [2020-07-21 12:16:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:07,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:07,342 INFO L225 Difference]: With dead ends: 2680 [2020-07-21 12:16:07,342 INFO L226 Difference]: Without dead ends: 1793 [2020-07-21 12:16:07,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-07-21 12:16:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1786. [2020-07-21 12:16:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-07-21 12:16:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2675 transitions. [2020-07-21 12:16:07,437 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2675 transitions. Word has length 241 [2020-07-21 12:16:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:07,437 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2675 transitions. [2020-07-21 12:16:07,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2675 transitions. [2020-07-21 12:16:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:07,442 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] [2020-07-21 12:16:07,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:07,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1455894560, now seen corresponding path program 1 times [2020-07-21 12:16:07,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:07,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41893405] [2020-07-21 12:16:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:08,095 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 12:16:08,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:08,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41893405] [2020-07-21 12:16:08,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:08,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:08,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472172763] [2020-07-21 12:16:08,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:08,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:08,099 INFO L87 Difference]: Start difference. First operand 1786 states and 2675 transitions. Second operand 3 states. [2020-07-21 12:16:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:08,310 INFO L93 Difference]: Finished difference Result 5269 states and 8082 transitions. [2020-07-21 12:16:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:08,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:08,346 INFO L225 Difference]: With dead ends: 5269 [2020-07-21 12:16:08,347 INFO L226 Difference]: Without dead ends: 3515 [2020-07-21 12:16:08,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-07-21 12:16:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3504. [2020-07-21 12:16:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3504 states. [2020-07-21 12:16:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5263 transitions. [2020-07-21 12:16:08,570 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5263 transitions. Word has length 241 [2020-07-21 12:16:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:08,571 INFO L479 AbstractCegarLoop]: Abstraction has 3504 states and 5263 transitions. [2020-07-21 12:16:08,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5263 transitions. [2020-07-21 12:16:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:08,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:08,576 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] [2020-07-21 12:16:08,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:08,793 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1836447041, now seen corresponding path program 1 times [2020-07-21 12:16:08,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:08,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222523802] [2020-07-21 12:16:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:09,213 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 12:16:09,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:09,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222523802] [2020-07-21 12:16:09,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:09,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:09,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014452260] [2020-07-21 12:16:09,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:09,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:09,216 INFO L87 Difference]: Start difference. First operand 3504 states and 5263 transitions. Second operand 3 states. [2020-07-21 12:16:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:09,440 INFO L93 Difference]: Finished difference Result 10399 states and 16010 transitions. [2020-07-21 12:16:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:09,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:09,484 INFO L225 Difference]: With dead ends: 10399 [2020-07-21 12:16:09,484 INFO L226 Difference]: Without dead ends: 6927 [2020-07-21 12:16:09,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2020-07-21 12:16:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6908. [2020-07-21 12:16:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6908 states. [2020-07-21 12:16:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 10415 transitions. [2020-07-21 12:16:09,846 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 10415 transitions. Word has length 241 [2020-07-21 12:16:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:09,846 INFO L479 AbstractCegarLoop]: Abstraction has 6908 states and 10415 transitions. [2020-07-21 12:16:09,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 10415 transitions. [2020-07-21 12:16:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:09,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:09,852 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] [2020-07-21 12:16:10,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:10,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1563451618, now seen corresponding path program 1 times [2020-07-21 12:16:10,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:10,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828873233] [2020-07-21 12:16:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:10,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:10,502 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 12:16:10,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:10,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828873233] [2020-07-21 12:16:10,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:10,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:10,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422791133] [2020-07-21 12:16:10,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:10,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:10,505 INFO L87 Difference]: Start difference. First operand 6908 states and 10415 transitions. Second operand 3 states. [2020-07-21 12:16:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:10,890 INFO L93 Difference]: Finished difference Result 20563 states and 31830 transitions. [2020-07-21 12:16:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:10,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:10,991 INFO L225 Difference]: With dead ends: 20563 [2020-07-21 12:16:10,991 INFO L226 Difference]: Without dead ends: 13687 [2020-07-21 12:16:11,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2020-07-21 12:16:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13652. [2020-07-21 12:16:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13652 states. [2020-07-21 12:16:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20695 transitions. [2020-07-21 12:16:11,665 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20695 transitions. Word has length 241 [2020-07-21 12:16:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:11,666 INFO L479 AbstractCegarLoop]: Abstraction has 13652 states and 20695 transitions. [2020-07-21 12:16:11,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20695 transitions. [2020-07-21 12:16:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:11,670 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] [2020-07-21 12:16:11,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:11,885 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1484333763, now seen corresponding path program 1 times [2020-07-21 12:16:11,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:11,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860114262] [2020-07-21 12:16:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:12,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:12,249 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 12:16:12,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:12,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860114262] [2020-07-21 12:16:12,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:12,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:12,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982941983] [2020-07-21 12:16:12,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:12,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:12,252 INFO L87 Difference]: Start difference. First operand 13652 states and 20695 transitions. Second operand 3 states. [2020-07-21 12:16:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:13,003 INFO L93 Difference]: Finished difference Result 40699 states and 63518 transitions. [2020-07-21 12:16:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:13,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:13,160 INFO L225 Difference]: With dead ends: 40699 [2020-07-21 12:16:13,160 INFO L226 Difference]: Without dead ends: 27079 [2020-07-21 12:16:13,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-07-21 12:16:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 27012. [2020-07-21 12:16:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-21 12:16:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41279 transitions. [2020-07-21 12:16:15,085 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41279 transitions. Word has length 241 [2020-07-21 12:16:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:15,086 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41279 transitions. [2020-07-21 12:16:15,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41279 transitions. [2020-07-21 12:16:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:15,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:15,090 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] [2020-07-21 12:16:15,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:15,303 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446910, now seen corresponding path program 1 times [2020-07-21 12:16:15,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:15,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449095150] [2020-07-21 12:16:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:15,849 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 12:16:15,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:15,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449095150] [2020-07-21 12:16:15,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:15,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:15,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384306170] [2020-07-21 12:16:15,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:15,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:15,852 INFO L87 Difference]: Start difference. First operand 27012 states and 41279 transitions. Second operand 3 states. [2020-07-21 12:16:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:16,980 INFO L93 Difference]: Finished difference Result 80587 states and 127350 transitions. [2020-07-21 12:16:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:16,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:17,219 INFO L225 Difference]: With dead ends: 80587 [2020-07-21 12:16:17,219 INFO L226 Difference]: Without dead ends: 53607 [2020-07-21 12:16:17,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53607 states. [2020-07-21 12:16:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53607 to 53476. [2020-07-21 12:16:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53476 states. [2020-07-21 12:16:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53476 states to 53476 states and 82711 transitions. [2020-07-21 12:16:20,672 INFO L78 Accepts]: Start accepts. Automaton has 53476 states and 82711 transitions. Word has length 241 [2020-07-21 12:16:20,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:20,673 INFO L479 AbstractCegarLoop]: Abstraction has 53476 states and 82711 transitions. [2020-07-21 12:16:20,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 53476 states and 82711 transitions. [2020-07-21 12:16:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:20,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:20,677 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] [2020-07-21 12:16:20,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:20,892 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash -564026113, now seen corresponding path program 1 times [2020-07-21 12:16:20,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:20,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631120778] [2020-07-21 12:16:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:21,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:21,288 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 12:16:21,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:21,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631120778] [2020-07-21 12:16:21,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:21,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:21,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059580972] [2020-07-21 12:16:21,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:21,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:21,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:21,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:21,291 INFO L87 Difference]: Start difference. First operand 53476 states and 82711 transitions. Second operand 3 states. [2020-07-21 12:16:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:24,735 INFO L93 Difference]: Finished difference Result 159595 states and 257006 transitions. [2020-07-21 12:16:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:24,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:25,257 INFO L225 Difference]: With dead ends: 159595 [2020-07-21 12:16:25,258 INFO L226 Difference]: Without dead ends: 106151 [2020-07-21 12:16:25,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106151 states. [2020-07-21 12:16:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106151 to 105892. [2020-07-21 12:16:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105892 states. [2020-07-21 12:16:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105892 states to 105892 states and 166751 transitions. [2020-07-21 12:16:30,360 INFO L78 Accepts]: Start accepts. Automaton has 105892 states and 166751 transitions. Word has length 241 [2020-07-21 12:16:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:30,361 INFO L479 AbstractCegarLoop]: Abstraction has 105892 states and 166751 transitions. [2020-07-21 12:16:30,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 105892 states and 166751 transitions. [2020-07-21 12:16:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:30,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:30,362 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] [2020-07-21 12:16:30,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:30,570 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash 13716800, now seen corresponding path program 1 times [2020-07-21 12:16:30,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:30,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409541688] [2020-07-21 12:16:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:30,938 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 12:16:30,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:30,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409541688] [2020-07-21 12:16:30,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:30,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:30,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795133044] [2020-07-21 12:16:30,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:30,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:30,941 INFO L87 Difference]: Start difference. First operand 105892 states and 166751 transitions. Second operand 3 states. [2020-07-21 12:16:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:37,363 INFO L93 Difference]: Finished difference Result 316075 states and 523542 transitions. [2020-07-21 12:16:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:37,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:16:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:38,164 INFO L225 Difference]: With dead ends: 316075 [2020-07-21 12:16:38,165 INFO L226 Difference]: Without dead ends: 210215 [2020-07-21 12:16:38,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:16:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210215 states. [2020-07-21 12:16:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210215 to 209700. [2020-07-21 12:16:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209700 states. [2020-07-21 12:16:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209700 states to 209700 states and 339127 transitions. [2020-07-21 12:16:48,957 INFO L78 Accepts]: Start accepts. Automaton has 209700 states and 339127 transitions. Word has length 241 [2020-07-21 12:16:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:48,958 INFO L479 AbstractCegarLoop]: Abstraction has 209700 states and 339127 transitions. [2020-07-21 12:16:48,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 209700 states and 339127 transitions. [2020-07-21 12:16:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:16:48,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:48,960 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] [2020-07-21 12:16:49,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:49,175 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash 233424705, now seen corresponding path program 1 times [2020-07-21 12:16:49,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:49,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643530159] [2020-07-21 12:16:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:54,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:54,236 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 12:16:54,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:54,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643530159] [2020-07-21 12:16:54,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:54,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:54,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913497115] [2020-07-21 12:16:54,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:54,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:54,240 INFO L87 Difference]: Start difference. First operand 209700 states and 339127 transitions. Second operand 3 states. [2020-07-21 12:17:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:04,721 INFO L93 Difference]: Finished difference Result 625963 states and 1080782 transitions. [2020-07-21 12:17:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:04,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 12:17:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:06,119 INFO L225 Difference]: With dead ends: 625963 [2020-07-21 12:17:06,119 INFO L226 Difference]: Without dead ends: 416295 [2020-07-21 12:17:16,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 12:17:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416295 states. [2020-07-21 12:17:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416295 to 415268. [2020-07-21 12:17:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 12:17:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 698303 transitions. [2020-07-21 12:17:45,968 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 698303 transitions. Word has length 241 [2020-07-21 12:17:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:45,969 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 698303 transitions. [2020-07-21 12:17:45,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 698303 transitions. [2020-07-21 12:17:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:17:45,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:45,971 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] [2020-07-21 12:17:46,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:46,192 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash 805568096, now seen corresponding path program 1 times [2020-07-21 12:17:46,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:46,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186878709] [2020-07-21 12:17:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:17:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:46,588 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 12:17:46,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:46,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186878709] [2020-07-21 12:17:46,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:46,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:17:46,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002533559] [2020-07-21 12:17:46,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:17:46,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:17:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:17:46,592 INFO L87 Difference]: Start difference. First operand 415268 states and 698303 transitions. Second operand 5 states. [2020-07-21 12:18:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:17,730 INFO L93 Difference]: Finished difference Result 830505 states and 1399635 transitions. [2020-07-21 12:18:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:18:17,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 12:18:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:19,850 INFO L225 Difference]: With dead ends: 830505 [2020-07-21 12:18:19,850 INFO L226 Difference]: Without dead ends: 415268 [2020-07-21 12:18:30,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 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 12:18:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415268 states. [2020-07-21 12:18:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415268 to 415268. [2020-07-21 12:18:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 12:18:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 695231 transitions. [2020-07-21 12:18:49,717 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 695231 transitions. Word has length 241 [2020-07-21 12:18:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:49,717 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 695231 transitions. [2020-07-21 12:18:49,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:18:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 695231 transitions. [2020-07-21 12:18:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:18:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:49,719 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] [2020-07-21 12:18:49,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:49,920 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:49,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2140674268, now seen corresponding path program 1 times [2020-07-21 12:18:49,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:49,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872177477] [2020-07-21 12:18:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:18:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:50,286 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 12:18:50,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:50,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872177477] [2020-07-21 12:18:50,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:50,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:18:50,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642147514] [2020-07-21 12:18:50,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:18:50,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:18:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:50,288 INFO L87 Difference]: Start difference. First operand 415268 states and 695231 transitions. Second operand 5 states. [2020-07-21 12:19:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:31,858 INFO L93 Difference]: Finished difference Result 938538 states and 1744260 transitions. [2020-07-21 12:19:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:19:31,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 12:19:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:35,119 INFO L225 Difference]: With dead ends: 938538 [2020-07-21 12:19:35,119 INFO L226 Difference]: Without dead ends: 523301 [2020-07-21 12:19:53,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 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 12:19:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523301 states. [2020-07-21 12:20:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523301 to 490020. [2020-07-21 12:20:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-21 12:20:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 783551 transitions. [2020-07-21 12:20:40,474 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 783551 transitions. Word has length 241 [2020-07-21 12:20:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:40,475 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 783551 transitions. [2020-07-21 12:20:40,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:20:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 783551 transitions. [2020-07-21 12:20:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 12:20:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:40,477 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] [2020-07-21 12:20:40,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:40,691 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -764543912, now seen corresponding path program 1 times [2020-07-21 12:20:40,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:40,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261475965] [2020-07-21 12:20:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:20:41,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:41,063 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 12:20:41,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:41,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261475965] [2020-07-21 12:20:41,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:41,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:20:41,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057838604] [2020-07-21 12:20:41,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:20:41,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:20:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:20:41,069 INFO L87 Difference]: Start difference. First operand 490020 states and 783551 transitions. Second operand 5 states.