/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_VARIABLES --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 17:22:24,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:22:24,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:22:24,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:22:24,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:22:24,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:22:24,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:22:24,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:22:24,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:22:24,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:22:24,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:22:24,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:22:24,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:22:24,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:22:24,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:22:24,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:22:24,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:22:24,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:22:24,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:22:24,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:22:24,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:22:24,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:22:24,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:22:24,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:22:24,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:22:24,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:22:24,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:22:24,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:22:24,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:22:24,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:22:24,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:22:24,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:22:24,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:22:24,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:22:24,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:22:24,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:22:24,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:22:24,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:22:24,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:22:24,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:22:24,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:22:24,323 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 17:22:24,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:22:24,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:22:24,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:22:24,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:22:24,340 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:22:24,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:22:24,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:22:24,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:22:24,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:22:24,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:22:24,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:22:24,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:22:24,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:22:24,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:22:24,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:22:24,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:22:24,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:22:24,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:22:24,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:22:24,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:22:24,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:22:24,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:22:24,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:22:24,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:22:24,345 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_VARIABLES 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 17:22:24,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:22:24,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:22:24,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:22:24,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:22:24,652 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:22:24,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 17:22:24,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8aa024ad/4dadc174541d4c52bcd7ff948f4506fe/FLAG995445ffc [2020-07-21 17:22:25,259 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:22:25,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 17:22:25,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8aa024ad/4dadc174541d4c52bcd7ff948f4506fe/FLAG995445ffc [2020-07-21 17:22:25,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8aa024ad/4dadc174541d4c52bcd7ff948f4506fe [2020-07-21 17:22:25,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:22:25,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:22:25,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:22:25,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:22:25,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:22:25,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:22:25" (1/1) ... [2020-07-21 17:22:25,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395c8a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:25, skipping insertion in model container [2020-07-21 17:22:25,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:22:25" (1/1) ... [2020-07-21 17:22:25,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:22:25,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:22:26,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:22:26,292 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:22:26,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:22:26,397 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:22:26,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26 WrapperNode [2020-07-21 17:22:26,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:22:26,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:22:26,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:22:26,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:22:26,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (1/1) ... [2020-07-21 17:22:26,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:22:26,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:22:26,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:22:26,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:22:26,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (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 17:22:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:22:26,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:22:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 17:22:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 17:22:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 17:22:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 17:22:26,589 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 17:22:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 17:22:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 17:22:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 17:22:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 17:22:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 17:22:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 17:22:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 17:22:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 17:22:26,593 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 17:22:26,593 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 17:22:26,594 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 17:22:26,594 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 17:22:26,594 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 17:22:26,595 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 17:22:26,595 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 17:22:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 17:22:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 17:22:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 17:22:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 17:22:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 17:22:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 17:22:26,600 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 17:22:26,601 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 17:22:26,601 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 17:22:26,601 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 17:22:26,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:22:26,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:22:26,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 17:22:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 17:22:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 17:22:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 17:22:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 17:22:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 17:22:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 17:22:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 17:22:26,605 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 17:22:26,606 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 17:22:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 17:22:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:22:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:22:26,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:22:27,916 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:22:27,916 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 17:22:27,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:22:27 BoogieIcfgContainer [2020-07-21 17:22:27,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:22:27,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:22:27,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:22:27,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:22:27,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:22:25" (1/3) ... [2020-07-21 17:22:27,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f58ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:22:27, skipping insertion in model container [2020-07-21 17:22:27,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:26" (2/3) ... [2020-07-21 17:22:27,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f58ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:22:27, skipping insertion in model container [2020-07-21 17:22:27,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:22:27" (3/3) ... [2020-07-21 17:22:27,932 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-21 17:22:27,942 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:22:27,950 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:22:27,964 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:22:27,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:22:27,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:22:27,990 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:22:27,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:22:27,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:22:27,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:22:27,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:22:27,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:22:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-21 17:22:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 17:22:28,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:28,037 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 17:22:28,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-21 17:22:28,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:28,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101527887] [2020-07-21 17:22:28,055 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 17:22:28,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:22:28,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:28,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:28,520 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 17:22:28,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:28,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101527887] [2020-07-21 17:22:28,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:28,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:28,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267171659] [2020-07-21 17:22:28,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:28,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:28,546 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-21 17:22:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:28,656 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-21 17:22:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:28,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 17:22:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:28,689 INFO L225 Difference]: With dead ends: 981 [2020-07-21 17:22:28,689 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 17:22:28,705 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 17:22:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 17:22:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 17:22:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 17:22:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-21 17:22:28,808 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-21 17:22:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:28,810 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-21 17:22:28,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-21 17:22:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 17:22:28,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:28,816 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 17:22:29,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:29,030 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-21 17:22:29,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:29,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887012073] [2020-07-21 17:22:29,033 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 17:22:29,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:22:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:29,330 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 17:22:29,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:29,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887012073] [2020-07-21 17:22:29,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:29,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:29,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015577221] [2020-07-21 17:22:29,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:29,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:29,335 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-21 17:22:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:29,392 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-21 17:22:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:29,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 17:22:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:29,398 INFO L225 Difference]: With dead ends: 957 [2020-07-21 17:22:29,399 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 17:22:29,402 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 17:22:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 17:22:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 17:22:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 17:22:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-21 17:22:29,462 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-21 17:22:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:29,464 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-21 17:22:29,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-21 17:22:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 17:22:29,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:29,473 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 17:22:29,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:29,687 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-21 17:22:29,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:29,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576598464] [2020-07-21 17:22:29,688 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 17:22:30,064 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:30,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:30,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:30,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576598464] [2020-07-21 17:22:30,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:30,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:30,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814712860] [2020-07-21 17:22:30,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:30,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:30,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:30,131 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-21 17:22:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:30,227 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-21 17:22:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:30,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 17:22:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:30,237 INFO L225 Difference]: With dead ends: 1382 [2020-07-21 17:22:30,237 INFO L226 Difference]: Without dead ends: 925 [2020-07-21 17:22:30,240 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 17:22:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-21 17:22:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-21 17:22:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-21 17:22:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-21 17:22:30,298 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-21 17:22:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:30,299 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-21 17:22:30,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-21 17:22:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:30,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:30,304 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 17:22:30,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:30,518 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-21 17:22:30,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:30,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144133037] [2020-07-21 17:22:30,520 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 17:22:30,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:30,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:31,039 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 17:22:31,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:31,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144133037] [2020-07-21 17:22:31,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:31,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:31,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420044932] [2020-07-21 17:22:31,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:31,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:31,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:31,042 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 3 states. [2020-07-21 17:22:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:31,177 INFO L93 Difference]: Finished difference Result 2680 states and 4099 transitions. [2020-07-21 17:22:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:31,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:31,190 INFO L225 Difference]: With dead ends: 2680 [2020-07-21 17:22:31,190 INFO L226 Difference]: Without dead ends: 1793 [2020-07-21 17:22:31,195 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 17:22:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-07-21 17:22:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1786. [2020-07-21 17:22:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-07-21 17:22:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2675 transitions. [2020-07-21 17:22:31,290 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2675 transitions. Word has length 241 [2020-07-21 17:22:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:31,291 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2675 transitions. [2020-07-21 17:22:31,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2675 transitions. [2020-07-21 17:22:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:31,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:31,295 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 17:22:31,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:31,511 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1455894560, now seen corresponding path program 1 times [2020-07-21 17:22:31,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:31,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485473566] [2020-07-21 17:22:31,513 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 17:22:31,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:31,957 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 17:22:31,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:31,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485473566] [2020-07-21 17:22:31,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:31,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:31,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749684044] [2020-07-21 17:22:31,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:31,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:31,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:31,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:31,961 INFO L87 Difference]: Start difference. First operand 1786 states and 2675 transitions. Second operand 3 states. [2020-07-21 17:22:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:32,160 INFO L93 Difference]: Finished difference Result 5269 states and 8082 transitions. [2020-07-21 17:22:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:32,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:32,184 INFO L225 Difference]: With dead ends: 5269 [2020-07-21 17:22:32,184 INFO L226 Difference]: Without dead ends: 3515 [2020-07-21 17:22:32,194 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 17:22:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-07-21 17:22:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3504. [2020-07-21 17:22:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3504 states. [2020-07-21 17:22:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5263 transitions. [2020-07-21 17:22:32,364 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5263 transitions. Word has length 241 [2020-07-21 17:22:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:32,364 INFO L479 AbstractCegarLoop]: Abstraction has 3504 states and 5263 transitions. [2020-07-21 17:22:32,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5263 transitions. [2020-07-21 17:22:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:32,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:32,369 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 17:22:32,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:32,583 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1836447041, now seen corresponding path program 1 times [2020-07-21 17:22:32,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:32,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068862337] [2020-07-21 17:22:32,586 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 17:22:32,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:32,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:33,122 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 17:22:33,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:33,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068862337] [2020-07-21 17:22:33,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:33,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:33,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701755691] [2020-07-21 17:22:33,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:33,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:33,125 INFO L87 Difference]: Start difference. First operand 3504 states and 5263 transitions. Second operand 3 states. [2020-07-21 17:22:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:33,481 INFO L93 Difference]: Finished difference Result 10399 states and 16010 transitions. [2020-07-21 17:22:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:33,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:33,541 INFO L225 Difference]: With dead ends: 10399 [2020-07-21 17:22:33,541 INFO L226 Difference]: Without dead ends: 6927 [2020-07-21 17:22:33,566 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 17:22:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2020-07-21 17:22:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6908. [2020-07-21 17:22:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6908 states. [2020-07-21 17:22:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 10415 transitions. [2020-07-21 17:22:34,044 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 10415 transitions. Word has length 241 [2020-07-21 17:22:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:34,045 INFO L479 AbstractCegarLoop]: Abstraction has 6908 states and 10415 transitions. [2020-07-21 17:22:34,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 10415 transitions. [2020-07-21 17:22:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:34,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:34,049 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 17:22:34,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:34,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:34,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1563451618, now seen corresponding path program 1 times [2020-07-21 17:22:34,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:34,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079965016] [2020-07-21 17:22:34,268 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 17:22:34,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:34,821 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 17:22:34,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:34,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079965016] [2020-07-21 17:22:34,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:34,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:34,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768728608] [2020-07-21 17:22:34,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:34,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:34,825 INFO L87 Difference]: Start difference. First operand 6908 states and 10415 transitions. Second operand 3 states. [2020-07-21 17:22:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:35,379 INFO L93 Difference]: Finished difference Result 20563 states and 31830 transitions. [2020-07-21 17:22:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:35,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:35,499 INFO L225 Difference]: With dead ends: 20563 [2020-07-21 17:22:35,503 INFO L226 Difference]: Without dead ends: 13687 [2020-07-21 17:22:35,558 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 17:22:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2020-07-21 17:22:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13652. [2020-07-21 17:22:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13652 states. [2020-07-21 17:22:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20695 transitions. [2020-07-21 17:22:36,244 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20695 transitions. Word has length 241 [2020-07-21 17:22:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:36,245 INFO L479 AbstractCegarLoop]: Abstraction has 13652 states and 20695 transitions. [2020-07-21 17:22:36,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20695 transitions. [2020-07-21 17:22:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:36,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:36,250 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 17:22:36,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:36,464 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1484333763, now seen corresponding path program 1 times [2020-07-21 17:22:36,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:36,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627848120] [2020-07-21 17:22:36,466 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 17:22:36,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:36,998 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 17:22:36,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:36,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627848120] [2020-07-21 17:22:36,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:36,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:36,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23406633] [2020-07-21 17:22:37,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:37,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:37,001 INFO L87 Difference]: Start difference. First operand 13652 states and 20695 transitions. Second operand 3 states. [2020-07-21 17:22:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:37,740 INFO L93 Difference]: Finished difference Result 40699 states and 63518 transitions. [2020-07-21 17:22:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:37,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:37,888 INFO L225 Difference]: With dead ends: 40699 [2020-07-21 17:22:37,888 INFO L226 Difference]: Without dead ends: 27079 [2020-07-21 17:22:37,971 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 17:22:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-07-21 17:22:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 27012. [2020-07-21 17:22:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-21 17:22:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41279 transitions. [2020-07-21 17:22:40,180 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41279 transitions. Word has length 241 [2020-07-21 17:22:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:40,181 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41279 transitions. [2020-07-21 17:22:40,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41279 transitions. [2020-07-21 17:22:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:40,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:40,185 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 17:22:40,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:40,399 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446910, now seen corresponding path program 1 times [2020-07-21 17:22:40,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:40,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721880426] [2020-07-21 17:22:40,401 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 17:22:40,712 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:40,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:40,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:40,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721880426] [2020-07-21 17:22:40,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:40,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:40,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605480183] [2020-07-21 17:22:40,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:40,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:40,815 INFO L87 Difference]: Start difference. First operand 27012 states and 41279 transitions. Second operand 3 states. [2020-07-21 17:22:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:42,181 INFO L93 Difference]: Finished difference Result 80587 states and 127350 transitions. [2020-07-21 17:22:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:42,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:42,452 INFO L225 Difference]: With dead ends: 80587 [2020-07-21 17:22:42,453 INFO L226 Difference]: Without dead ends: 53607 [2020-07-21 17:22:42,846 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 17:22:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53607 states. [2020-07-21 17:22:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53607 to 53476. [2020-07-21 17:22:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53476 states. [2020-07-21 17:22:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53476 states to 53476 states and 82711 transitions. [2020-07-21 17:22:44,967 INFO L78 Accepts]: Start accepts. Automaton has 53476 states and 82711 transitions. Word has length 241 [2020-07-21 17:22:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:44,968 INFO L479 AbstractCegarLoop]: Abstraction has 53476 states and 82711 transitions. [2020-07-21 17:22:44,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 53476 states and 82711 transitions. [2020-07-21 17:22:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:44,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:44,972 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 17:22:45,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:45,185 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash -564026113, now seen corresponding path program 1 times [2020-07-21 17:22:45,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:45,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417035696] [2020-07-21 17:22:45,186 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 17:22:45,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:45,574 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 17:22:45,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:45,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417035696] [2020-07-21 17:22:45,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:45,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:45,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993811270] [2020-07-21 17:22:45,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:45,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:45,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:45,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:45,577 INFO L87 Difference]: Start difference. First operand 53476 states and 82711 transitions. Second operand 3 states. [2020-07-21 17:22:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:48,772 INFO L93 Difference]: Finished difference Result 159595 states and 257006 transitions. [2020-07-21 17:22:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:48,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:22:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:49,235 INFO L225 Difference]: With dead ends: 159595 [2020-07-21 17:22:49,236 INFO L226 Difference]: Without dead ends: 106151 [2020-07-21 17:22:49,537 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 17:22:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106151 states. [2020-07-21 17:22:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106151 to 105892. [2020-07-21 17:22:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105892 states. [2020-07-21 17:22:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105892 states to 105892 states and 166751 transitions. [2020-07-21 17:22:54,785 INFO L78 Accepts]: Start accepts. Automaton has 105892 states and 166751 transitions. Word has length 241 [2020-07-21 17:22:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:54,786 INFO L479 AbstractCegarLoop]: Abstraction has 105892 states and 166751 transitions. [2020-07-21 17:22:54,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 105892 states and 166751 transitions. [2020-07-21 17:22:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:22:54,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:54,789 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 17:22:55,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:55,003 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 13716800, now seen corresponding path program 1 times [2020-07-21 17:22:55,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:55,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824750909] [2020-07-21 17:22:55,004 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 17:22:55,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:55,418 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 17:22:55,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:55,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824750909] [2020-07-21 17:22:55,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:55,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:55,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772558423] [2020-07-21 17:22:55,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:55,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:55,422 INFO L87 Difference]: Start difference. First operand 105892 states and 166751 transitions. Second operand 3 states. [2020-07-21 17:23:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:02,564 INFO L93 Difference]: Finished difference Result 316075 states and 523542 transitions. [2020-07-21 17:23:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:02,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:23:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:03,335 INFO L225 Difference]: With dead ends: 316075 [2020-07-21 17:23:03,335 INFO L226 Difference]: Without dead ends: 210215 [2020-07-21 17:23:03,796 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 17:23:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210215 states. [2020-07-21 17:23:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210215 to 209700. [2020-07-21 17:23:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209700 states. [2020-07-21 17:23:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209700 states to 209700 states and 339127 transitions. [2020-07-21 17:23:18,000 INFO L78 Accepts]: Start accepts. Automaton has 209700 states and 339127 transitions. Word has length 241 [2020-07-21 17:23:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:23:18,001 INFO L479 AbstractCegarLoop]: Abstraction has 209700 states and 339127 transitions. [2020-07-21 17:23:18,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:23:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 209700 states and 339127 transitions. [2020-07-21 17:23:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:23:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:23:18,003 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 17:23:18,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:18,217 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:23:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:23:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 233424705, now seen corresponding path program 1 times [2020-07-21 17:23:18,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:23:18,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105405095] [2020-07-21 17:23:18,219 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 17:23:18,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:23:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:23:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:23:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:23:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:23:18,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:23:18,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105405095] [2020-07-21 17:23:18,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:23:18,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:23:18,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019091293] [2020-07-21 17:23:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:23:18,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:23:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:23:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:18,597 INFO L87 Difference]: Start difference. First operand 209700 states and 339127 transitions. Second operand 3 states. [2020-07-21 17:23:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:34,702 INFO L93 Difference]: Finished difference Result 625963 states and 1080782 transitions. [2020-07-21 17:23:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:34,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 17:23:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:36,131 INFO L225 Difference]: With dead ends: 625963 [2020-07-21 17:23:36,131 INFO L226 Difference]: Without dead ends: 416295 [2020-07-21 17:23:37,485 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 17:23:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416295 states. [2020-07-21 17:24:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416295 to 415268. [2020-07-21 17:24:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 17:24:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 698303 transitions. [2020-07-21 17:24:10,960 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 698303 transitions. Word has length 241 [2020-07-21 17:24:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:10,961 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 698303 transitions. [2020-07-21 17:24:10,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 698303 transitions. [2020-07-21 17:24:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:24:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:10,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:11,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:11,169 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 805568096, now seen corresponding path program 1 times [2020-07-21 17:24:11,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:11,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885797317] [2020-07-21 17:24:11,171 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 17:24:11,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:24:11,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:11,563 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 17:24:11,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:11,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885797317] [2020-07-21 17:24:11,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:11,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:24:11,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568201810] [2020-07-21 17:24:11,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:24:11,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:11,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:24:11,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:24:11,567 INFO L87 Difference]: Start difference. First operand 415268 states and 698303 transitions. Second operand 5 states. [2020-07-21 17:24:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:41,021 INFO L93 Difference]: Finished difference Result 830505 states and 1399635 transitions. [2020-07-21 17:24:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:24:41,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 17:24:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:42,422 INFO L225 Difference]: With dead ends: 830505 [2020-07-21 17:24:42,422 INFO L226 Difference]: Without dead ends: 415268 [2020-07-21 17:24:45,777 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 17:24:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415268 states. [2020-07-21 17:25:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415268 to 415268. [2020-07-21 17:25:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-21 17:25:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 695231 transitions. [2020-07-21 17:25:14,074 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 695231 transitions. Word has length 241 [2020-07-21 17:25:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:14,074 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 695231 transitions. [2020-07-21 17:25:14,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:25:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 695231 transitions. [2020-07-21 17:25:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:25:14,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:14,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:14,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:14,277 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2140674268, now seen corresponding path program 1 times [2020-07-21 17:25:14,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:14,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108656097] [2020-07-21 17:25:14,279 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 17:25:14,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:25:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:14,652 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 17:25:14,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:14,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108656097] [2020-07-21 17:25:14,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:14,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:25:14,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78785467] [2020-07-21 17:25:14,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:25:14,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:25:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:14,655 INFO L87 Difference]: Start difference. First operand 415268 states and 695231 transitions. Second operand 5 states. [2020-07-21 17:26:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:07,011 INFO L93 Difference]: Finished difference Result 938538 states and 1744260 transitions. [2020-07-21 17:26:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:26:07,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 17:26:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:10,606 INFO L225 Difference]: With dead ends: 938538 [2020-07-21 17:26:10,606 INFO L226 Difference]: Without dead ends: 523301 [2020-07-21 17:26:15,859 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 17:26:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523301 states. [2020-07-21 17:26:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523301 to 490020. [2020-07-21 17:26:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-21 17:27:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 783551 transitions. [2020-07-21 17:27:03,030 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 783551 transitions. Word has length 241 [2020-07-21 17:27:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:03,030 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 783551 transitions. [2020-07-21 17:27:03,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:27:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 783551 transitions. [2020-07-21 17:27:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 17:27:03,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:03,032 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 17:27:03,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:03,243 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -764543912, now seen corresponding path program 1 times [2020-07-21 17:27:03,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:03,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249435608] [2020-07-21 17:27:03,245 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 17:27:03,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:27:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:03,580 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 17:27:03,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:03,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249435608] [2020-07-21 17:27:03,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:03,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:27:03,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170856908] [2020-07-21 17:27:03,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:27:03,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:27:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:27:03,582 INFO L87 Difference]: Start difference. First operand 490020 states and 783551 transitions. Second operand 5 states.