/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:38:23,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:38:23,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:38:23,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:38:23,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:38:23,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:38:23,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:38:23,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:38:23,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:38:23,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:38:23,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:38:23,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:38:23,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:38:23,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:38:23,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:38:23,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:38:23,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:38:23,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:38:23,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:38:23,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:38:23,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:38:23,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:38:23,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:38:23,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:38:23,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:38:23,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:38:23,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:38:23,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:38:23,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:38:23,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:38:23,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:38:23,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:38:23,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:38:23,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:38:23,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:38:23,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:38:23,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:38:23,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:38:23,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:38:23,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:38:23,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:38:23,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:38:23,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:38:23,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:38:23,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:38:23,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:38:23,526 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:38:23,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:38:23,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:38:23,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:38:23,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:38:23,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:38:23,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:38:23,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:38:23,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:38:23,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:38:23,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:38:23,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:38:23,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:38:23,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:38:23,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:38:23,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:38:23,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:38:23,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:38:23,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:38:23,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:38:23,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:38:23,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:38:23,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:23,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:38:23,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:38:23,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:38:23,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:38:23,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:38:23,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:38:23,894 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:38:23,895 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:38:23,895 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 14:38:23,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb7a6361e/d618ca8305454bf3b6cdb91146dd2e00/FLAG541063c36 [2020-07-21 14:38:24,484 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:38:24,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 14:38:24,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb7a6361e/d618ca8305454bf3b6cdb91146dd2e00/FLAG541063c36 [2020-07-21 14:38:24,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb7a6361e/d618ca8305454bf3b6cdb91146dd2e00 [2020-07-21 14:38:24,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:38:24,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:38:24,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:38:24,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:38:24,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:38:24,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:38:24" (1/1) ... [2020-07-21 14:38:24,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711bde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:24, skipping insertion in model container [2020-07-21 14:38:24,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:38:24" (1/1) ... [2020-07-21 14:38:24,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:38:24,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:38:25,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:38:25,220 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:38:25,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:38:25,466 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:38:25,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25 WrapperNode [2020-07-21 14:38:25,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:38:25,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:38:25,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:38:25,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:38:25,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... [2020-07-21 14:38:25,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:38:25,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:38:25,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:38:25,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:38:25,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:38:25,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:38:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:38:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 14:38:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 14:38:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 14:38:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 14:38:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 14:38:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 14:38:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 14:38:25,652 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 14:38:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 14:38:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 14:38:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 14:38:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 14:38:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 14:38:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 14:38:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 14:38:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 14:38:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 14:38:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 14:38:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 14:38:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 14:38:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 14:38:25,657 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 14:38:25,657 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 14:38:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 14:38:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 14:38:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 14:38:25,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 14:38:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 14:38:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 14:38:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 14:38:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 14:38:25,659 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 14:38:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 14:38:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 14:38:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 14:38:25,660 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 14:38:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 14:38:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 14:38:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 14:38:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 14:38:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 14:38:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 14:38:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:38:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:38:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 14:38:25,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 14:38:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 14:38:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 14:38:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 14:38:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 14:38:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 14:38:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 14:38:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 14:38:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 14:38:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 14:38:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 14:38:25,668 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 14:38:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 14:38:25,669 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 14:38:25,670 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 14:38:25,670 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 14:38:25,670 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 14:38:25,671 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 14:38:25,671 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 14:38:25,671 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 14:38:25,672 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 14:38:25,672 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 14:38:25,672 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 14:38:25,672 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 14:38:25,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 14:38:25,673 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 14:38:25,673 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 14:38:25,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 14:38:25,673 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 14:38:25,674 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 14:38:25,674 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 14:38:25,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:38:25,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:38:25,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:38:27,067 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:38:27,067 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 14:38:27,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:38:27 BoogieIcfgContainer [2020-07-21 14:38:27,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:38:27,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:38:27,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:38:27,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:38:27,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:38:24" (1/3) ... [2020-07-21 14:38:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3aecaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:38:27, skipping insertion in model container [2020-07-21 14:38:27,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:38:25" (2/3) ... [2020-07-21 14:38:27,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3aecaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:38:27, skipping insertion in model container [2020-07-21 14:38:27,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:38:27" (3/3) ... [2020-07-21 14:38:27,092 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-21 14:38:27,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:38:27,126 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:38:27,142 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:38:27,175 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:38:27,176 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:38:27,176 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:38:27,176 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:38:27,177 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:38:27,177 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:38:27,177 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:38:27,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:38:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-21 14:38:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 14:38:27,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:27,253 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 14:38:27,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-21 14:38:27,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:27,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660224428] [2020-07-21 14:38:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:27,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:27,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:27,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660224428] [2020-07-21 14:38:27,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:27,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:27,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294694532] [2020-07-21 14:38:27,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:27,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:27,826 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-21 14:38:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:27,949 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-21 14:38:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:27,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 14:38:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:27,982 INFO L225 Difference]: With dead ends: 981 [2020-07-21 14:38:27,983 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 14:38:28,000 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 14:38:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 14:38:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 14:38:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 14:38:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-21 14:38:28,106 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-21 14:38:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:28,108 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-21 14:38:28,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-21 14:38:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 14:38:28,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:28,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:38:28,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:28,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-21 14:38:28,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:28,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66531342] [2020-07-21 14:38:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:28,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:28,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:28,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66531342] [2020-07-21 14:38:28,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:28,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:28,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662423710] [2020-07-21 14:38:28,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:28,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:28,681 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-21 14:38:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:28,770 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-21 14:38:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:28,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 14:38:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:28,776 INFO L225 Difference]: With dead ends: 957 [2020-07-21 14:38:28,777 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 14:38:28,780 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 14:38:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 14:38:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 14:38:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 14:38:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-21 14:38:28,848 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-21 14:38:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:28,849 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-21 14:38:28,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-21 14:38:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 14:38:28,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:28,857 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 14:38:29,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:29,071 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-21 14:38:29,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:29,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140425687] [2020-07-21 14:38:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:29,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:38:29,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:38:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:29,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:29,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140425687] [2020-07-21 14:38:29,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:29,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:29,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412598351] [2020-07-21 14:38:29,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:29,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:29,405 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-21 14:38:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:29,500 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-21 14:38:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:29,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 14:38:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:29,512 INFO L225 Difference]: With dead ends: 1382 [2020-07-21 14:38:29,512 INFO L226 Difference]: Without dead ends: 925 [2020-07-21 14:38:29,514 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 14:38:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-21 14:38:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-21 14:38:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-21 14:38:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-21 14:38:29,590 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-21 14:38:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:29,593 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-21 14:38:29,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-21 14:38:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:29,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:29,598 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 14:38:29,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:29,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-21 14:38:29,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:29,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118706129] [2020-07-21 14:38:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:30,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:30,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:30,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:30,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:30,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118706129] [2020-07-21 14:38:30,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:30,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:30,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028226941] [2020-07-21 14:38:30,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:30,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:30,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:30,372 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 3 states. [2020-07-21 14:38:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:30,506 INFO L93 Difference]: Finished difference Result 2680 states and 4099 transitions. [2020-07-21 14:38:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:30,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:30,530 INFO L225 Difference]: With dead ends: 2680 [2020-07-21 14:38:30,530 INFO L226 Difference]: Without dead ends: 1793 [2020-07-21 14:38:30,536 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 14:38:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-07-21 14:38:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1786. [2020-07-21 14:38:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-07-21 14:38:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2675 transitions. [2020-07-21 14:38:30,668 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2675 transitions. Word has length 241 [2020-07-21 14:38:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:30,669 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2675 transitions. [2020-07-21 14:38:30,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2675 transitions. [2020-07-21 14:38:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:30,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:30,674 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 14:38:30,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:30,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1455894560, now seen corresponding path program 1 times [2020-07-21 14:38:30,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:30,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913656733] [2020-07-21 14:38:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:31,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:31,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:31,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913656733] [2020-07-21 14:38:31,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:31,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:31,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199727721] [2020-07-21 14:38:31,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:31,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:31,386 INFO L87 Difference]: Start difference. First operand 1786 states and 2675 transitions. Second operand 3 states. [2020-07-21 14:38:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:31,555 INFO L93 Difference]: Finished difference Result 5269 states and 8082 transitions. [2020-07-21 14:38:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:31,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:31,596 INFO L225 Difference]: With dead ends: 5269 [2020-07-21 14:38:31,596 INFO L226 Difference]: Without dead ends: 3515 [2020-07-21 14:38:31,608 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 14:38:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-07-21 14:38:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3504. [2020-07-21 14:38:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3504 states. [2020-07-21 14:38:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5263 transitions. [2020-07-21 14:38:31,860 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5263 transitions. Word has length 241 [2020-07-21 14:38:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:31,860 INFO L479 AbstractCegarLoop]: Abstraction has 3504 states and 5263 transitions. [2020-07-21 14:38:31,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5263 transitions. [2020-07-21 14:38:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:31,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:31,866 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 14:38:32,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:32,082 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1836447041, now seen corresponding path program 1 times [2020-07-21 14:38:32,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:32,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970214322] [2020-07-21 14:38:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:32,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:32,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:32,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:32,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970214322] [2020-07-21 14:38:32,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:32,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:32,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742609814] [2020-07-21 14:38:32,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:32,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:32,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:32,553 INFO L87 Difference]: Start difference. First operand 3504 states and 5263 transitions. Second operand 3 states. [2020-07-21 14:38:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:32,864 INFO L93 Difference]: Finished difference Result 10399 states and 16010 transitions. [2020-07-21 14:38:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:32,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:32,913 INFO L225 Difference]: With dead ends: 10399 [2020-07-21 14:38:32,913 INFO L226 Difference]: Without dead ends: 6927 [2020-07-21 14:38:32,935 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 14:38:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2020-07-21 14:38:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6908. [2020-07-21 14:38:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6908 states. [2020-07-21 14:38:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 10415 transitions. [2020-07-21 14:38:33,280 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 10415 transitions. Word has length 241 [2020-07-21 14:38:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:33,281 INFO L479 AbstractCegarLoop]: Abstraction has 6908 states and 10415 transitions. [2020-07-21 14:38:33,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 10415 transitions. [2020-07-21 14:38:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:33,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:33,285 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 14:38:33,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:33,499 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1563451618, now seen corresponding path program 1 times [2020-07-21 14:38:33,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:33,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097014833] [2020-07-21 14:38:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:33,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:33,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:34,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:34,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097014833] [2020-07-21 14:38:34,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:34,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:34,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323178656] [2020-07-21 14:38:34,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:34,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:34,030 INFO L87 Difference]: Start difference. First operand 6908 states and 10415 transitions. Second operand 3 states. [2020-07-21 14:38:34,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:34,429 INFO L93 Difference]: Finished difference Result 20563 states and 31830 transitions. [2020-07-21 14:38:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:34,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:34,529 INFO L225 Difference]: With dead ends: 20563 [2020-07-21 14:38:34,530 INFO L226 Difference]: Without dead ends: 13687 [2020-07-21 14:38:34,579 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 14:38:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2020-07-21 14:38:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13652. [2020-07-21 14:38:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13652 states. [2020-07-21 14:38:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20695 transitions. [2020-07-21 14:38:35,271 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20695 transitions. Word has length 241 [2020-07-21 14:38:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:35,272 INFO L479 AbstractCegarLoop]: Abstraction has 13652 states and 20695 transitions. [2020-07-21 14:38:35,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20695 transitions. [2020-07-21 14:38:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:35,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:35,276 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 14:38:35,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:35,490 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:35,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1484333763, now seen corresponding path program 1 times [2020-07-21 14:38:35,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:35,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086283640] [2020-07-21 14:38:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:35,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:35,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:36,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:36,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086283640] [2020-07-21 14:38:36,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:36,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:36,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163867046] [2020-07-21 14:38:36,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:36,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:36,013 INFO L87 Difference]: Start difference. First operand 13652 states and 20695 transitions. Second operand 3 states. [2020-07-21 14:38:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:36,725 INFO L93 Difference]: Finished difference Result 40699 states and 63518 transitions. [2020-07-21 14:38:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:36,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:37,777 INFO L225 Difference]: With dead ends: 40699 [2020-07-21 14:38:37,778 INFO L226 Difference]: Without dead ends: 27079 [2020-07-21 14:38:37,874 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 14:38:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-07-21 14:38:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 27012. [2020-07-21 14:38:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-21 14:38:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41279 transitions. [2020-07-21 14:38:39,164 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41279 transitions. Word has length 241 [2020-07-21 14:38:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:39,165 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41279 transitions. [2020-07-21 14:38:39,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41279 transitions. [2020-07-21 14:38:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:39,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:39,169 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 14:38:39,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:39,382 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446910, now seen corresponding path program 1 times [2020-07-21 14:38:39,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:39,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727564519] [2020-07-21 14:38:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:39,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:39,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:39,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:39,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727564519] [2020-07-21 14:38:39,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:39,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:39,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205235807] [2020-07-21 14:38:39,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:39,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:39,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:39,765 INFO L87 Difference]: Start difference. First operand 27012 states and 41279 transitions. Second operand 3 states. [2020-07-21 14:38:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:40,923 INFO L93 Difference]: Finished difference Result 80587 states and 127350 transitions. [2020-07-21 14:38:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:40,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:41,240 INFO L225 Difference]: With dead ends: 80587 [2020-07-21 14:38:41,240 INFO L226 Difference]: Without dead ends: 53607 [2020-07-21 14:38:41,386 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 14:38:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53607 states. [2020-07-21 14:38:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53607 to 53476. [2020-07-21 14:38:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53476 states. [2020-07-21 14:38:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53476 states to 53476 states and 82711 transitions. [2020-07-21 14:38:44,778 INFO L78 Accepts]: Start accepts. Automaton has 53476 states and 82711 transitions. Word has length 241 [2020-07-21 14:38:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:44,779 INFO L479 AbstractCegarLoop]: Abstraction has 53476 states and 82711 transitions. [2020-07-21 14:38:44,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 53476 states and 82711 transitions. [2020-07-21 14:38:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:44,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:44,781 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 14:38:44,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:44,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -564026113, now seen corresponding path program 1 times [2020-07-21 14:38:44,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:44,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42394207] [2020-07-21 14:38:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:45,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:45,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:45,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:45,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42394207] [2020-07-21 14:38:45,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:45,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:45,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717663705] [2020-07-21 14:38:45,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:45,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:45,403 INFO L87 Difference]: Start difference. First operand 53476 states and 82711 transitions. Second operand 3 states. [2020-07-21 14:38:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:38:49,100 INFO L93 Difference]: Finished difference Result 159595 states and 257006 transitions. [2020-07-21 14:38:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:38:49,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:38:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:38:49,668 INFO L225 Difference]: With dead ends: 159595 [2020-07-21 14:38:49,668 INFO L226 Difference]: Without dead ends: 106151 [2020-07-21 14:38:50,021 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 14:38:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106151 states. [2020-07-21 14:38:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106151 to 105892. [2020-07-21 14:38:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105892 states. [2020-07-21 14:38:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105892 states to 105892 states and 166751 transitions. [2020-07-21 14:38:55,456 INFO L78 Accepts]: Start accepts. Automaton has 105892 states and 166751 transitions. Word has length 241 [2020-07-21 14:38:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:38:55,457 INFO L479 AbstractCegarLoop]: Abstraction has 105892 states and 166751 transitions. [2020-07-21 14:38:55,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:38:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 105892 states and 166751 transitions. [2020-07-21 14:38:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:38:55,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:38:55,458 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 14:38:55,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:55,660 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:38:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:38:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 13716800, now seen corresponding path program 1 times [2020-07-21 14:38:55,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:38:55,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855905228] [2020-07-21 14:38:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:38:56,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:38:56,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:38:56,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:38:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:38:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:38:56,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:38:56,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855905228] [2020-07-21 14:38:56,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:38:56,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:38:56,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748433750] [2020-07-21 14:38:56,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:38:56,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:38:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:38:56,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:38:56,622 INFO L87 Difference]: Start difference. First operand 105892 states and 166751 transitions. Second operand 3 states. [2020-07-21 14:39:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:39:03,057 INFO L93 Difference]: Finished difference Result 316075 states and 523542 transitions. [2020-07-21 14:39:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:39:03,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:39:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:39:03,903 INFO L225 Difference]: With dead ends: 316075 [2020-07-21 14:39:03,903 INFO L226 Difference]: Without dead ends: 210215 [2020-07-21 14:39:04,494 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 14:39:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210215 states. [2020-07-21 14:39:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210215 to 209700. [2020-07-21 14:39:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209700 states. [2020-07-21 14:39:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209700 states to 209700 states and 339127 transitions. [2020-07-21 14:39:20,454 INFO L78 Accepts]: Start accepts. Automaton has 209700 states and 339127 transitions. Word has length 241 [2020-07-21 14:39:20,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:39:20,455 INFO L479 AbstractCegarLoop]: Abstraction has 209700 states and 339127 transitions. [2020-07-21 14:39:20,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:39:20,455 INFO L276 IsEmpty]: Start isEmpty. Operand 209700 states and 339127 transitions. [2020-07-21 14:39:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:39:20,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:39:20,457 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 14:39:20,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:20,671 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:39:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:39:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 233424705, now seen corresponding path program 1 times [2020-07-21 14:39:20,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:39:20,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614883120] [2020-07-21 14:39:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:39:20,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:39:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:39:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:39:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:39:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:39:21,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:39:21,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614883120] [2020-07-21 14:39:21,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:39:21,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:39:21,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661675886] [2020-07-21 14:39:21,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:39:21,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:39:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:39:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:39:21,057 INFO L87 Difference]: Start difference. First operand 209700 states and 339127 transitions. Second operand 3 states. [2020-07-21 14:39:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:39:40,343 INFO L93 Difference]: Finished difference Result 625963 states and 1080782 transitions. [2020-07-21 14:39:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:39:40,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 14:39:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:39:42,886 INFO L225 Difference]: With dead ends: 625963 [2020-07-21 14:39:42,887 INFO L226 Difference]: Without dead ends: 416295 [2020-07-21 14:39:44,335 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 14:39:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416295 states. [2020-07-21 14:40:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416295 to 415268. [2020-07-21 14:40:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 14:40:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 698303 transitions. [2020-07-21 14:40:30,270 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 698303 transitions. Word has length 241 [2020-07-21 14:40:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:40:30,270 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 698303 transitions. [2020-07-21 14:40:30,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:40:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 698303 transitions. [2020-07-21 14:40:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:40:30,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:40:30,273 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 14:40:30,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:40:30,486 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:40:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:40:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash 805568096, now seen corresponding path program 1 times [2020-07-21 14:40:30,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:40:30,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564014378] [2020-07-21 14:40:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:40:30,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:40:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:40:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:40:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:40:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:40:30,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:40:30,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564014378] [2020-07-21 14:40:30,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:40:30,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:40:30,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266162006] [2020-07-21 14:40:30,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:40:30,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:40:30,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:40:30,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:40:30,902 INFO L87 Difference]: Start difference. First operand 415268 states and 698303 transitions. Second operand 5 states. [2020-07-21 14:40:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:40:49,659 INFO L93 Difference]: Finished difference Result 830505 states and 1399635 transitions. [2020-07-21 14:40:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:40:49,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 14:40:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:40:53,131 INFO L225 Difference]: With dead ends: 830505 [2020-07-21 14:40:53,131 INFO L226 Difference]: Without dead ends: 415268 [2020-07-21 14:41:09,292 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 14:41:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415268 states. [2020-07-21 14:41:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415268 to 415268. [2020-07-21 14:41:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 14:41:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 695231 transitions. [2020-07-21 14:41:36,262 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 695231 transitions. Word has length 241 [2020-07-21 14:41:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:36,263 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 695231 transitions. [2020-07-21 14:41:36,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:41:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 695231 transitions. [2020-07-21 14:41:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:41:36,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:36,264 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 14:41:36,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:36,465 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2140674268, now seen corresponding path program 1 times [2020-07-21 14:41:36,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:36,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46948994] [2020-07-21 14:41:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:36,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:41:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:41:36,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:36,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:36,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46948994] [2020-07-21 14:41:36,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:36,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:41:36,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332074918] [2020-07-21 14:41:36,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:41:36,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:41:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:41:36,865 INFO L87 Difference]: Start difference. First operand 415268 states and 695231 transitions. Second operand 5 states. [2020-07-21 14:42:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:29,736 INFO L93 Difference]: Finished difference Result 938538 states and 1744260 transitions. [2020-07-21 14:42:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:42:29,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 14:42:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:33,976 INFO L225 Difference]: With dead ends: 938538 [2020-07-21 14:42:33,976 INFO L226 Difference]: Without dead ends: 523301 [2020-07-21 14:42:39,909 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 14:42:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523301 states. [2020-07-21 14:43:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523301 to 490020. [2020-07-21 14:43:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-21 14:43:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 783551 transitions. [2020-07-21 14:43:15,079 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 783551 transitions. Word has length 241 [2020-07-21 14:43:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:15,080 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 783551 transitions. [2020-07-21 14:43:15,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:43:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 783551 transitions. [2020-07-21 14:43:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:43:15,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:15,081 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 14:43:15,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:15,288 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -764543912, now seen corresponding path program 1 times [2020-07-21 14:43:15,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:15,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172291636] [2020-07-21 14:43:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:15,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:15,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:43:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:28,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:28,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172291636] [2020-07-21 14:43:28,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:28,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:43:28,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818057875] [2020-07-21 14:43:28,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:43:28,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:43:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:28,236 INFO L87 Difference]: Start difference. First operand 490020 states and 783551 transitions. Second operand 5 states. [2020-07-21 14:43:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:49,505 INFO L93 Difference]: Finished difference Result 980009 states and 1570131 transitions. [2020-07-21 14:43:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:49,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 14:43:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:52,908 INFO L225 Difference]: With dead ends: 980009 [2020-07-21 14:43:52,908 INFO L226 Difference]: Without dead ends: 490020 [2020-07-21 14:43:56,455 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 14:43:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490020 states. [2020-07-21 14:44:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490020 to 490020. [2020-07-21 14:44:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-21 14:44:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 780479 transitions. [2020-07-21 14:44:32,279 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 780479 transitions. Word has length 241 [2020-07-21 14:44:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:32,280 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 780479 transitions. [2020-07-21 14:44:32,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:44:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 780479 transitions. [2020-07-21 14:44:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:44:32,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:32,282 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 14:44:32,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:32,488 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1140753876, now seen corresponding path program 1 times [2020-07-21 14:44:32,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:32,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990754930] [2020-07-21 14:44:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:32,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:44:32,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:32,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:44:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:32,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:32,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990754930] [2020-07-21 14:44:32,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:32,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:44:32,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319826094] [2020-07-21 14:44:32,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:44:32,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:44:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:44:32,848 INFO L87 Difference]: Start difference. First operand 490020 states and 780479 transitions. Second operand 5 states. [2020-07-21 14:45:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:06,651 INFO L93 Difference]: Finished difference Result 980009 states and 1563987 transitions. [2020-07-21 14:45:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:45:06,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 14:45:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:08,468 INFO L225 Difference]: With dead ends: 980009 [2020-07-21 14:45:08,469 INFO L226 Difference]: Without dead ends: 490020 [2020-07-21 14:45:13,460 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 14:45:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490020 states. [2020-07-21 14:45:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490020 to 490020. [2020-07-21 14:45:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-21 14:45:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 777407 transitions. [2020-07-21 14:45:53,395 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 777407 transitions. Word has length 241 [2020-07-21 14:45:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:53,395 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 777407 transitions. [2020-07-21 14:45:53,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:45:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 777407 transitions. [2020-07-21 14:45:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 14:45:53,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:53,397 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 14:45:53,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:53,605 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1984373544, now seen corresponding path program 1 times [2020-07-21 14:45:53,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:53,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825560326] [2020-07-21 14:45:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:07,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:07,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:46:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:07,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:07,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825560326] [2020-07-21 14:46:07,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:07,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:46:07,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430583324] [2020-07-21 14:46:07,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:46:07,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:07,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:46:07,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:07,843 INFO L87 Difference]: Start difference. First operand 490020 states and 777407 transitions. Second operand 5 states. [2020-07-21 14:46:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:31,955 INFO L93 Difference]: Finished difference Result 980009 states and 1557843 transitions. [2020-07-21 14:46:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:31,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 14:46:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:33,630 INFO L225 Difference]: With dead ends: 980009 [2020-07-21 14:46:33,630 INFO L226 Difference]: Without dead ends: 490020 [2020-07-21 14:46:38,509 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 14:46:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490020 states.