/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 15:00:07,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:00:07,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:00:07,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:00:07,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:00:07,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:00:07,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:00:07,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:00:07,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:00:07,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:00:07,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:00:07,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:00:07,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:00:07,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:00:07,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:00:07,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:00:07,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:00:07,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:00:07,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:00:07,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:00:07,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:00:07,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:00:07,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:00:07,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:00:07,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 15:00:07,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 15:00:07,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 15:00:07,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 15:00:07,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 15:00:07,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 15:00:07,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 15:00:07,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 15:00:07,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 15:00:07,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 15:00:07,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 15:00:07,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 15:00:07,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 15:00:07,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 15:00:07,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:00:07,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:00:07,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:00:07,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:00:07,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:00:07,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:00:07,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:00:07,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:00:07,239 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:00:07,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:00:07,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:00:07,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:00:07,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:00:07,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:00:07,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:00:07,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:00:07,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:00:07,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:00:07,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:00:07,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:00:07,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:00:07,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:00:07,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:00:07,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:00:07,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:00:07,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:00:07,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:00:07,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:00:07,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:00:07,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:00:07,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:07,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:00:07,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:00:07,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:00:07,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:00:07,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:00:07,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:00:07,527 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:00:07,528 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:00:07,528 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-20 15:00:07,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52390525b/eb59e3efc7db4d799d8b94060b08049c/FLAGd7b6f27dc [2020-07-20 15:00:08,110 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:00:08,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-20 15:00:08,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52390525b/eb59e3efc7db4d799d8b94060b08049c/FLAGd7b6f27dc [2020-07-20 15:00:08,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52390525b/eb59e3efc7db4d799d8b94060b08049c [2020-07-20 15:00:08,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:00:08,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:00:08,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:00:08,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:00:08,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:00:08,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:00:08" (1/1) ... [2020-07-20 15:00:08,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f44038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:08, skipping insertion in model container [2020-07-20 15:00:08,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:00:08" (1/1) ... [2020-07-20 15:00:08,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:00:08,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:00:08,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:00:08,858 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:00:09,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:00:09,078 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:00:09,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09 WrapperNode [2020-07-20 15:00:09,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:00:09,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:00:09,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:00:09,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:00:09,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... [2020-07-20 15:00:09,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:00:09,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:00:09,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:00:09,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:00:09,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:00:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:00:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:00:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-20 15:00:09,256 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-20 15:00:09,257 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-20 15:00:09,257 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-20 15:00:09,257 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-20 15:00:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-20 15:00:09,258 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-20 15:00:09,259 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-20 15:00:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-20 15:00:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-20 15:00:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-20 15:00:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-20 15:00:09,260 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-20 15:00:09,261 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-20 15:00:09,261 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-20 15:00:09,261 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-20 15:00:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-20 15:00:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-20 15:00:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-20 15:00:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-20 15:00:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-20 15:00:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-20 15:00:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-20 15:00:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-20 15:00:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-20 15:00:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-20 15:00:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-20 15:00:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-20 15:00:09,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-20 15:00:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-20 15:00:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-20 15:00:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:00:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:00:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 15:00:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-20 15:00:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-20 15:00:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-20 15:00:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-20 15:00:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-20 15:00:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-20 15:00:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-20 15:00:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-20 15:00:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-20 15:00:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-20 15:00:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-20 15:00:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-20 15:00:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-20 15:00:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-20 15:00:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-20 15:00:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-20 15:00:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-20 15:00:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-20 15:00:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-20 15:00:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-20 15:00:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-20 15:00:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-20 15:00:09,273 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-20 15:00:09,273 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-20 15:00:09,274 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-20 15:00:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-20 15:00:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-20 15:00:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-20 15:00:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-20 15:00:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-20 15:00:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-20 15:00:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:00:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:00:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:00:10,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:00:10,567 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-20 15:00:10,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:00:10 BoogieIcfgContainer [2020-07-20 15:00:10,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:00:10,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:00:10,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:00:10,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:00:10,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:00:08" (1/3) ... [2020-07-20 15:00:10,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a993775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:00:10, skipping insertion in model container [2020-07-20 15:00:10,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:00:09" (2/3) ... [2020-07-20 15:00:10,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a993775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:00:10, skipping insertion in model container [2020-07-20 15:00:10,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:00:10" (3/3) ... [2020-07-20 15:00:10,588 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-20 15:00:10,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:00:10,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:00:10,639 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:00:10,679 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:00:10,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:00:10,679 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:00:10,680 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:00:10,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:00:10,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:00:10,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:00:10,681 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:00:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-20 15:00:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 15:00:10,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:10,753 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] [2020-07-20 15:00:10,753 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-20 15:00:10,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:10,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438980190] [2020-07-20 15:00:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:11,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:00:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 15:00:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:11,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:11,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438980190] [2020-07-20 15:00:11,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:11,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:11,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868752182] [2020-07-20 15:00:11,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:11,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:11,283 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-20 15:00:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:11,395 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-20 15:00:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:11,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 15:00:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:11,434 INFO L225 Difference]: With dead ends: 981 [2020-07-20 15:00:11,437 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 15:00:11,452 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 [2020-07-20 15:00:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 15:00:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 15:00:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 15:00:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-20 15:00:11,564 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-20 15:00:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:11,565 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-20 15:00:11,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:11,566 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-20 15:00:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 15:00:11,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:11,571 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] [2020-07-20 15:00:11,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:11,786 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:11,787 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-20 15:00:11,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:11,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2586481] [2020-07-20 15:00:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:11,953 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:00:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 15:00:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:12,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:12,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2586481] [2020-07-20 15:00:12,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:12,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:12,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037400821] [2020-07-20 15:00:12,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:12,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:12,067 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-20 15:00:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:12,143 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-20 15:00:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:12,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 15:00:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:12,150 INFO L225 Difference]: With dead ends: 957 [2020-07-20 15:00:12,150 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 15:00:12,153 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 [2020-07-20 15:00:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 15:00:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 15:00:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 15:00:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-20 15:00:12,202 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-20 15:00:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:12,204 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-20 15:00:12,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-20 15:00:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 15:00:12,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:12,209 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] [2020-07-20 15:00:12,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:12,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-20 15:00:12,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:12,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920734731] [2020-07-20 15:00:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:12,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:00:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 15:00:12,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:12,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:12,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920734731] [2020-07-20 15:00:12,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:12,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:12,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671236325] [2020-07-20 15:00:12,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:12,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:12,728 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-20 15:00:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:12,801 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-20 15:00:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:12,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 15:00:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:12,809 INFO L225 Difference]: With dead ends: 1382 [2020-07-20 15:00:12,809 INFO L226 Difference]: Without dead ends: 925 [2020-07-20 15:00:12,812 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 [2020-07-20 15:00:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-20 15:00:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-20 15:00:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-20 15:00:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-20 15:00:12,860 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-20 15:00:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:12,861 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-20 15:00:12,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-20 15:00:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:12,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:12,865 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] [2020-07-20 15:00:13,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:13,076 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-20 15:00:13,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:13,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198870494] [2020-07-20 15:00:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:13,396 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:00:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:13,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:13,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198870494] [2020-07-20 15:00:13,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:13,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:13,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722646135] [2020-07-20 15:00:13,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:13,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:13,494 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 3 states. [2020-07-20 15:00:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:13,580 INFO L93 Difference]: Finished difference Result 2680 states and 4099 transitions. [2020-07-20 15:00:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:13,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 15:00:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:13,592 INFO L225 Difference]: With dead ends: 2680 [2020-07-20 15:00:13,593 INFO L226 Difference]: Without dead ends: 1793 [2020-07-20 15:00:13,598 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 [2020-07-20 15:00:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-07-20 15:00:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1786. [2020-07-20 15:00:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-07-20 15:00:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2675 transitions. [2020-07-20 15:00:13,685 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2675 transitions. Word has length 241 [2020-07-20 15:00:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:13,686 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2675 transitions. [2020-07-20 15:00:13,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2675 transitions. [2020-07-20 15:00:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:13,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:13,689 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] [2020-07-20 15:00:13,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:13,905 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1455894560, now seen corresponding path program 1 times [2020-07-20 15:00:13,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:13,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587736346] [2020-07-20 15:00:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:14,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:00:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:14,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587736346] [2020-07-20 15:00:14,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:14,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354518850] [2020-07-20 15:00:14,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:14,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:14,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:14,324 INFO L87 Difference]: Start difference. First operand 1786 states and 2675 transitions. Second operand 3 states. [2020-07-20 15:00:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:14,467 INFO L93 Difference]: Finished difference Result 5269 states and 8082 transitions. [2020-07-20 15:00:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:14,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 15:00:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:14,490 INFO L225 Difference]: With dead ends: 5269 [2020-07-20 15:00:14,491 INFO L226 Difference]: Without dead ends: 3515 [2020-07-20 15:00:14,502 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 [2020-07-20 15:00:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-07-20 15:00:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3504. [2020-07-20 15:00:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3504 states. [2020-07-20 15:00:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5263 transitions. [2020-07-20 15:00:14,687 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5263 transitions. Word has length 241 [2020-07-20 15:00:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:14,687 INFO L479 AbstractCegarLoop]: Abstraction has 3504 states and 5263 transitions. [2020-07-20 15:00:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5263 transitions. [2020-07-20 15:00:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:14,691 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] [2020-07-20 15:00:14,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:14,905 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1836447041, now seen corresponding path program 1 times [2020-07-20 15:00:14,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:14,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612629947] [2020-07-20 15:00:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:15,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:00:15,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:15,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:15,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612629947] [2020-07-20 15:00:15,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:15,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:15,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970090382] [2020-07-20 15:00:15,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:15,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:15,331 INFO L87 Difference]: Start difference. First operand 3504 states and 5263 transitions. Second operand 3 states. [2020-07-20 15:00:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:15,563 INFO L93 Difference]: Finished difference Result 10399 states and 16010 transitions. [2020-07-20 15:00:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:15,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 15:00:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:15,606 INFO L225 Difference]: With dead ends: 10399 [2020-07-20 15:00:15,607 INFO L226 Difference]: Without dead ends: 6927 [2020-07-20 15:00:15,631 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 [2020-07-20 15:00:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2020-07-20 15:00:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6908. [2020-07-20 15:00:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6908 states. [2020-07-20 15:00:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 10415 transitions. [2020-07-20 15:00:16,038 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 10415 transitions. Word has length 241 [2020-07-20 15:00:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:16,039 INFO L479 AbstractCegarLoop]: Abstraction has 6908 states and 10415 transitions. [2020-07-20 15:00:16,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 10415 transitions. [2020-07-20 15:00:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:16,043 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] [2020-07-20 15:00:16,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:16,252 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1258704128, now seen corresponding path program 1 times [2020-07-20 15:00:16,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:16,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111286657] [2020-07-20 15:00:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:16,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:00:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:16,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:16,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111286657] [2020-07-20 15:00:16,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:16,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:16,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784501503] [2020-07-20 15:00:16,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:16,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:16,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:16,674 INFO L87 Difference]: Start difference. First operand 6908 states and 10415 transitions. Second operand 3 states. [2020-07-20 15:00:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:17,036 INFO L93 Difference]: Finished difference Result 20563 states and 31830 transitions. [2020-07-20 15:00:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:17,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 15:00:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:17,216 INFO L225 Difference]: With dead ends: 20563 [2020-07-20 15:00:17,222 INFO L226 Difference]: Without dead ends: 13687 [2020-07-20 15:00:17,261 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 [2020-07-20 15:00:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2020-07-20 15:00:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13652. [2020-07-20 15:00:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13652 states. [2020-07-20 15:00:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20695 transitions. [2020-07-20 15:00:17,795 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20695 transitions. Word has length 241 [2020-07-20 15:00:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:17,796 INFO L479 AbstractCegarLoop]: Abstraction has 13652 states and 20695 transitions. [2020-07-20 15:00:17,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20695 transitions. [2020-07-20 15:00:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:17,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:17,800 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] [2020-07-20 15:00:18,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:18,015 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1038996223, now seen corresponding path program 1 times [2020-07-20 15:00:18,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:18,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579986482] [2020-07-20 15:00:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:18,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:18,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 15:00:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:18,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:18,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579986482] [2020-07-20 15:00:18,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:18,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:00:18,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718466510] [2020-07-20 15:00:18,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:00:18,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:18,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:00:18,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:18,450 INFO L87 Difference]: Start difference. First operand 13652 states and 20695 transitions. Second operand 3 states. [2020-07-20 15:00:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:19,206 INFO L93 Difference]: Finished difference Result 40699 states and 63518 transitions. [2020-07-20 15:00:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:00:19,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 15:00:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:19,326 INFO L225 Difference]: With dead ends: 40699 [2020-07-20 15:00:19,326 INFO L226 Difference]: Without dead ends: 27079 [2020-07-20 15:00:19,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:00:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-07-20 15:00:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 27012. [2020-07-20 15:00:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-20 15:00:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41279 transitions. [2020-07-20 15:00:21,403 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41279 transitions. Word has length 241 [2020-07-20 15:00:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:21,404 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41279 transitions. [2020-07-20 15:00:21,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:00:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41279 transitions. [2020-07-20 15:00:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:21,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:21,408 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] [2020-07-20 15:00:21,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:21,621 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -466852832, now seen corresponding path program 1 times [2020-07-20 15:00:21,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:21,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696944970] [2020-07-20 15:00:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:21,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:21,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:21,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:21,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:21,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696944970] [2020-07-20 15:00:21,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:21,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:21,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785642728] [2020-07-20 15:00:21,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:21,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:21,966 INFO L87 Difference]: Start difference. First operand 27012 states and 41279 transitions. Second operand 5 states. [2020-07-20 15:00:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:23,735 INFO L93 Difference]: Finished difference Result 53993 states and 82707 transitions. [2020-07-20 15:00:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:23,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:23,851 INFO L225 Difference]: With dead ends: 53993 [2020-07-20 15:00:23,852 INFO L226 Difference]: Without dead ends: 27012 [2020-07-20 15:00:23,934 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 [2020-07-20 15:00:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27012 states. [2020-07-20 15:00:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27012 to 27012. [2020-07-20 15:00:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-20 15:00:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41087 transitions. [2020-07-20 15:00:25,054 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41087 transitions. Word has length 241 [2020-07-20 15:00:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:25,054 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41087 transitions. [2020-07-20 15:00:25,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41087 transitions. [2020-07-20 15:00:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:25,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:25,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:00:25,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:25,257 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash 868253340, now seen corresponding path program 1 times [2020-07-20 15:00:25,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:25,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941861484] [2020-07-20 15:00:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:25,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:25,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:25,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941861484] [2020-07-20 15:00:25,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:25,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:25,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463700672] [2020-07-20 15:00:25,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:25,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:25,600 INFO L87 Difference]: Start difference. First operand 27012 states and 41087 transitions. Second operand 5 states. [2020-07-20 15:00:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:28,892 INFO L93 Difference]: Finished difference Result 67594 states and 110257 transitions. [2020-07-20 15:00:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:28,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:29,045 INFO L225 Difference]: With dead ends: 67594 [2020-07-20 15:00:29,045 INFO L226 Difference]: Without dead ends: 40613 [2020-07-20 15:00:29,200 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 [2020-07-20 15:00:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40613 states. [2020-07-20 15:00:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40613 to 36324. [2020-07-20 15:00:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36324 states. [2020-07-20 15:00:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 52479 transitions. [2020-07-20 15:00:30,587 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 52479 transitions. Word has length 241 [2020-07-20 15:00:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:30,588 INFO L479 AbstractCegarLoop]: Abstraction has 36324 states and 52479 transitions. [2020-07-20 15:00:30,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 52479 transitions. [2020-07-20 15:00:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:30,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:30,589 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] [2020-07-20 15:00:30,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:30,791 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1957846985, now seen corresponding path program 1 times [2020-07-20 15:00:30,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:30,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804639865] [2020-07-20 15:00:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:31,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:31,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:31,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:31,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804639865] [2020-07-20 15:00:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:31,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476531431] [2020-07-20 15:00:31,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:31,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:31,115 INFO L87 Difference]: Start difference. First operand 36324 states and 52479 transitions. Second operand 5 states. [2020-07-20 15:00:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:32,985 INFO L93 Difference]: Finished difference Result 72617 states and 105107 transitions. [2020-07-20 15:00:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:32,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:33,103 INFO L225 Difference]: With dead ends: 72617 [2020-07-20 15:00:33,104 INFO L226 Difference]: Without dead ends: 36324 [2020-07-20 15:00:33,184 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 [2020-07-20 15:00:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36324 states. [2020-07-20 15:00:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36324 to 36324. [2020-07-20 15:00:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36324 states. [2020-07-20 15:00:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 52287 transitions. [2020-07-20 15:00:35,516 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 52287 transitions. Word has length 241 [2020-07-20 15:00:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:35,516 INFO L479 AbstractCegarLoop]: Abstraction has 36324 states and 52287 transitions. [2020-07-20 15:00:35,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 52287 transitions. [2020-07-20 15:00:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:35,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:35,518 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] [2020-07-20 15:00:35,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:35,724 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash -52549197, now seen corresponding path program 1 times [2020-07-20 15:00:35,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:35,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628306310] [2020-07-20 15:00:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:35,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:35,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:36,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:36,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628306310] [2020-07-20 15:00:36,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:36,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:36,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502337057] [2020-07-20 15:00:36,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:36,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:36,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:36,049 INFO L87 Difference]: Start difference. First operand 36324 states and 52287 transitions. Second operand 5 states. [2020-07-20 15:00:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:38,137 INFO L93 Difference]: Finished difference Result 72617 states and 104723 transitions. [2020-07-20 15:00:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:38,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:38,252 INFO L225 Difference]: With dead ends: 72617 [2020-07-20 15:00:38,253 INFO L226 Difference]: Without dead ends: 36324 [2020-07-20 15:00:38,332 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 [2020-07-20 15:00:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36324 states. [2020-07-20 15:00:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36324 to 36324. [2020-07-20 15:00:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36324 states. [2020-07-20 15:00:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 52095 transitions. [2020-07-20 15:00:39,615 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 52095 transitions. Word has length 241 [2020-07-20 15:00:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:39,616 INFO L479 AbstractCegarLoop]: Abstraction has 36324 states and 52095 transitions. [2020-07-20 15:00:39,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 52095 transitions. [2020-07-20 15:00:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:39,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:39,618 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] [2020-07-20 15:00:39,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:39,819 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1117290679, now seen corresponding path program 1 times [2020-07-20 15:00:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112513498] [2020-07-20 15:00:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:40,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:40,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:40,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:40,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112513498] [2020-07-20 15:00:40,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:40,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:40,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105651835] [2020-07-20 15:00:40,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:40,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:40,117 INFO L87 Difference]: Start difference. First operand 36324 states and 52095 transitions. Second operand 5 states. [2020-07-20 15:00:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:43,055 INFO L93 Difference]: Finished difference Result 72617 states and 104339 transitions. [2020-07-20 15:00:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:43,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:43,130 INFO L225 Difference]: With dead ends: 72617 [2020-07-20 15:00:43,130 INFO L226 Difference]: Without dead ends: 36324 [2020-07-20 15:00:43,183 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 [2020-07-20 15:00:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36324 states. [2020-07-20 15:00:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36324 to 36324. [2020-07-20 15:00:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36324 states. [2020-07-20 15:00:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 51903 transitions. [2020-07-20 15:00:44,161 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 51903 transitions. Word has length 241 [2020-07-20 15:00:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:44,161 INFO L479 AbstractCegarLoop]: Abstraction has 36324 states and 51903 transitions. [2020-07-20 15:00:44,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 51903 transitions. [2020-07-20 15:00:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:44,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:44,164 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] [2020-07-20 15:00:44,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:44,371 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash 43282875, now seen corresponding path program 1 times [2020-07-20 15:00:44,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:44,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55189293] [2020-07-20 15:00:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:44,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:44,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:44,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:44,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55189293] [2020-07-20 15:00:44,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:44,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:44,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75294914] [2020-07-20 15:00:44,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:44,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:44,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:44,899 INFO L87 Difference]: Start difference. First operand 36324 states and 51903 transitions. Second operand 5 states. [2020-07-20 15:00:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:47,781 INFO L93 Difference]: Finished difference Result 86218 states and 129800 transitions. [2020-07-20 15:00:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:47,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:47,892 INFO L225 Difference]: With dead ends: 86218 [2020-07-20 15:00:47,893 INFO L226 Difference]: Without dead ends: 49925 [2020-07-20 15:00:47,974 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 [2020-07-20 15:00:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49925 states. [2020-07-20 15:00:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49925 to 45636. [2020-07-20 15:00:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45636 states. [2020-07-20 15:00:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45636 states to 45636 states and 63231 transitions. [2020-07-20 15:00:51,271 INFO L78 Accepts]: Start accepts. Automaton has 45636 states and 63231 transitions. Word has length 241 [2020-07-20 15:00:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:51,271 INFO L479 AbstractCegarLoop]: Abstraction has 45636 states and 63231 transitions. [2020-07-20 15:00:51,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 45636 states and 63231 transitions. [2020-07-20 15:00:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:51,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:51,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:00:51,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:51,489 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash 805116215, now seen corresponding path program 1 times [2020-07-20 15:00:51,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:51,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516797116] [2020-07-20 15:00:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:00:51,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:51,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:51,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:51,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516797116] [2020-07-20 15:00:51,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:51,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:51,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001567623] [2020-07-20 15:00:51,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:51,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:51,813 INFO L87 Difference]: Start difference. First operand 45636 states and 63231 transitions. Second operand 5 states. [2020-07-20 15:00:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:00:55,767 INFO L93 Difference]: Finished difference Result 104842 states and 154833 transitions. [2020-07-20 15:00:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:00:55,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:00:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:00:55,935 INFO L225 Difference]: With dead ends: 104842 [2020-07-20 15:00:55,935 INFO L226 Difference]: Without dead ends: 59237 [2020-07-20 15:00:56,053 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 [2020-07-20 15:00:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59237 states. [2020-07-20 15:00:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59237 to 54948. [2020-07-20 15:00:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54948 states. [2020-07-20 15:00:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 74399 transitions. [2020-07-20 15:00:58,146 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 74399 transitions. Word has length 241 [2020-07-20 15:00:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:00:58,147 INFO L479 AbstractCegarLoop]: Abstraction has 54948 states and 74399 transitions. [2020-07-20 15:00:58,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:00:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 74399 transitions. [2020-07-20 15:00:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:00:58,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:00:58,149 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] [2020-07-20 15:00:58,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:58,357 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:00:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:00:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -324162637, now seen corresponding path program 1 times [2020-07-20 15:00:58,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:00:58,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499712425] [2020-07-20 15:00:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:00:58,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:00:58,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:00:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:00:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:00:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:00:58,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:00:58,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499712425] [2020-07-20 15:00:58,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:00:58,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:00:58,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203638506] [2020-07-20 15:00:58,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:00:58,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:00:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:00:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:00:58,679 INFO L87 Difference]: Start difference. First operand 54948 states and 74399 transitions. Second operand 5 states. [2020-07-20 15:01:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:02,783 INFO L93 Difference]: Finished difference Result 109865 states and 148947 transitions. [2020-07-20 15:01:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:02,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:02,903 INFO L225 Difference]: With dead ends: 109865 [2020-07-20 15:01:02,904 INFO L226 Difference]: Without dead ends: 54948 [2020-07-20 15:01:02,983 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 [2020-07-20 15:01:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54948 states. [2020-07-20 15:01:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54948 to 54948. [2020-07-20 15:01:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54948 states. [2020-07-20 15:01:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 74207 transitions. [2020-07-20 15:01:04,876 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 74207 transitions. Word has length 241 [2020-07-20 15:01:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:04,876 INFO L479 AbstractCegarLoop]: Abstraction has 54948 states and 74207 transitions. [2020-07-20 15:01:04,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 74207 transitions. [2020-07-20 15:01:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:04,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:04,878 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] [2020-07-20 15:01:05,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:05,079 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1868320841, now seen corresponding path program 1 times [2020-07-20 15:01:05,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:05,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659438550] [2020-07-20 15:01:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:05,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:05,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:05,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659438550] [2020-07-20 15:01:05,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:05,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:05,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175735694] [2020-07-20 15:01:05,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:05,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:05,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:05,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:05,398 INFO L87 Difference]: Start difference. First operand 54948 states and 74207 transitions. Second operand 5 states. [2020-07-20 15:01:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:10,647 INFO L93 Difference]: Finished difference Result 109865 states and 148563 transitions. [2020-07-20 15:01:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:10,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:10,762 INFO L225 Difference]: With dead ends: 109865 [2020-07-20 15:01:10,762 INFO L226 Difference]: Without dead ends: 54948 [2020-07-20 15:01:10,838 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 [2020-07-20 15:01:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54948 states. [2020-07-20 15:01:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54948 to 54948. [2020-07-20 15:01:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54948 states. [2020-07-20 15:01:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 74015 transitions. [2020-07-20 15:01:14,866 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 74015 transitions. Word has length 241 [2020-07-20 15:01:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:14,866 INFO L479 AbstractCegarLoop]: Abstraction has 54948 states and 74015 transitions. [2020-07-20 15:01:14,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 74015 transitions. [2020-07-20 15:01:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:14,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:14,868 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] [2020-07-20 15:01:15,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:15,077 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1268456243, now seen corresponding path program 1 times [2020-07-20 15:01:15,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:15,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25823020] [2020-07-20 15:01:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:15,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:15,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:15,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25823020] [2020-07-20 15:01:15,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:15,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:15,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890919767] [2020-07-20 15:01:15,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:15,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:15,411 INFO L87 Difference]: Start difference. First operand 54948 states and 74015 transitions. Second operand 5 states. [2020-07-20 15:01:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:18,280 INFO L93 Difference]: Finished difference Result 109865 states and 148179 transitions. [2020-07-20 15:01:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:18,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:18,391 INFO L225 Difference]: With dead ends: 109865 [2020-07-20 15:01:18,392 INFO L226 Difference]: Without dead ends: 54948 [2020-07-20 15:01:18,465 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 [2020-07-20 15:01:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54948 states. [2020-07-20 15:01:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54948 to 54948. [2020-07-20 15:01:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54948 states. [2020-07-20 15:01:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 73823 transitions. [2020-07-20 15:01:20,723 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 73823 transitions. Word has length 241 [2020-07-20 15:01:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:20,723 INFO L479 AbstractCegarLoop]: Abstraction has 54948 states and 73823 transitions. [2020-07-20 15:01:20,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 73823 transitions. [2020-07-20 15:01:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:20,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:20,725 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] [2020-07-20 15:01:20,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:20,926 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash 203145527, now seen corresponding path program 1 times [2020-07-20 15:01:20,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:20,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282000941] [2020-07-20 15:01:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:21,182 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:21,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:21,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282000941] [2020-07-20 15:01:21,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:21,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:21,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958204905] [2020-07-20 15:01:21,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:21,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:21,235 INFO L87 Difference]: Start difference. First operand 54948 states and 73823 transitions. Second operand 5 states. [2020-07-20 15:01:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:26,443 INFO L93 Difference]: Finished difference Result 116682 states and 163589 transitions. [2020-07-20 15:01:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:26,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:26,586 INFO L225 Difference]: With dead ends: 116682 [2020-07-20 15:01:26,586 INFO L226 Difference]: Without dead ends: 61765 [2020-07-20 15:01:26,711 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 [2020-07-20 15:01:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61765 states. [2020-07-20 15:01:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61765 to 59684. [2020-07-20 15:01:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59684 states. [2020-07-20 15:01:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59684 states to 59684 states and 79231 transitions. [2020-07-20 15:01:29,129 INFO L78 Accepts]: Start accepts. Automaton has 59684 states and 79231 transitions. Word has length 241 [2020-07-20 15:01:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:29,129 INFO L479 AbstractCegarLoop]: Abstraction has 59684 states and 79231 transitions. [2020-07-20 15:01:29,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 59684 states and 79231 transitions. [2020-07-20 15:01:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:29,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:29,131 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] [2020-07-20 15:01:29,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:29,332 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1265673157, now seen corresponding path program 1 times [2020-07-20 15:01:29,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:29,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867086679] [2020-07-20 15:01:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:29,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:29,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:29,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867086679] [2020-07-20 15:01:29,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:29,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:29,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684725113] [2020-07-20 15:01:29,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:29,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:29,645 INFO L87 Difference]: Start difference. First operand 59684 states and 79231 transitions. Second operand 5 states. [2020-07-20 15:01:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:35,729 INFO L93 Difference]: Finished difference Result 126154 states and 172496 transitions. [2020-07-20 15:01:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:35,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:35,881 INFO L225 Difference]: With dead ends: 126154 [2020-07-20 15:01:35,882 INFO L226 Difference]: Without dead ends: 66501 [2020-07-20 15:01:35,985 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 [2020-07-20 15:01:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66501 states. [2020-07-20 15:01:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66501 to 64420. [2020-07-20 15:01:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64420 states. [2020-07-20 15:01:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64420 states to 64420 states and 84703 transitions. [2020-07-20 15:01:38,675 INFO L78 Accepts]: Start accepts. Automaton has 64420 states and 84703 transitions. Word has length 241 [2020-07-20 15:01:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:38,676 INFO L479 AbstractCegarLoop]: Abstraction has 64420 states and 84703 transitions. [2020-07-20 15:01:38,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64420 states and 84703 transitions. [2020-07-20 15:01:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:38,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:38,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:01:38,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:38,884 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 445587895, now seen corresponding path program 1 times [2020-07-20 15:01:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:38,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129385033] [2020-07-20 15:01:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:39,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:39,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:39,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129385033] [2020-07-20 15:01:39,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:39,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:39,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196782587] [2020-07-20 15:01:39,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:39,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:39,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:39,193 INFO L87 Difference]: Start difference. First operand 64420 states and 84703 transitions. Second operand 5 states. [2020-07-20 15:01:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:43,325 INFO L93 Difference]: Finished difference Result 128809 states and 169555 transitions. [2020-07-20 15:01:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:43,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:43,455 INFO L225 Difference]: With dead ends: 128809 [2020-07-20 15:01:43,456 INFO L226 Difference]: Without dead ends: 64420 [2020-07-20 15:01:43,539 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 [2020-07-20 15:01:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64420 states. [2020-07-20 15:01:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64420 to 64420. [2020-07-20 15:01:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64420 states. [2020-07-20 15:01:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64420 states to 64420 states and 84511 transitions. [2020-07-20 15:01:46,736 INFO L78 Accepts]: Start accepts. Automaton has 64420 states and 84511 transitions. Word has length 241 [2020-07-20 15:01:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:46,736 INFO L479 AbstractCegarLoop]: Abstraction has 64420 states and 84511 transitions. [2020-07-20 15:01:46,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 64420 states and 84511 transitions. [2020-07-20 15:01:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:46,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:46,737 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] [2020-07-20 15:01:46,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:46,938 INFO L427 AbstractCegarLoop]: === Iteration 22 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1726729029, now seen corresponding path program 1 times [2020-07-20 15:01:46,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:46,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024455430] [2020-07-20 15:01:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:47,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:47,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:47,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024455430] [2020-07-20 15:01:47,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:47,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:47,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189035440] [2020-07-20 15:01:47,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:47,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:47,245 INFO L87 Difference]: Start difference. First operand 64420 states and 84511 transitions. Second operand 5 states. [2020-07-20 15:01:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:01:53,733 INFO L93 Difference]: Finished difference Result 142410 states and 197649 transitions. [2020-07-20 15:01:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:01:53,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:01:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:01:53,936 INFO L225 Difference]: With dead ends: 142410 [2020-07-20 15:01:53,937 INFO L226 Difference]: Without dead ends: 78021 [2020-07-20 15:01:54,081 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 [2020-07-20 15:01:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78021 states. [2020-07-20 15:01:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78021 to 73732. [2020-07-20 15:01:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73732 states. [2020-07-20 15:01:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73732 states to 73732 states and 95391 transitions. [2020-07-20 15:01:57,776 INFO L78 Accepts]: Start accepts. Automaton has 73732 states and 95391 transitions. Word has length 241 [2020-07-20 15:01:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:01:57,776 INFO L479 AbstractCegarLoop]: Abstraction has 73732 states and 95391 transitions. [2020-07-20 15:01:57,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:01:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 73732 states and 95391 transitions. [2020-07-20 15:01:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:01:57,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:01:57,778 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] [2020-07-20 15:01:57,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:57,979 INFO L427 AbstractCegarLoop]: === Iteration 23 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:01:57,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:01:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -237140800, now seen corresponding path program 1 times [2020-07-20 15:01:57,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:01:57,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827059319] [2020-07-20 15:01:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:01:58,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:01:58,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:01:58,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:01:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:01:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:01:58,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:01:58,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827059319] [2020-07-20 15:01:58,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:01:58,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:01:58,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335926154] [2020-07-20 15:01:58,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:01:58,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:01:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:01:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:01:58,284 INFO L87 Difference]: Start difference. First operand 73732 states and 95391 transitions. Second operand 5 states. [2020-07-20 15:02:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:05,505 INFO L93 Difference]: Finished difference Result 154250 states and 204864 transitions. [2020-07-20 15:02:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:02:05,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:02:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:05,688 INFO L225 Difference]: With dead ends: 154250 [2020-07-20 15:02:05,688 INFO L226 Difference]: Without dead ends: 80549 [2020-07-20 15:02:05,811 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 [2020-07-20 15:02:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80549 states. [2020-07-20 15:02:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80549 to 78468. [2020-07-20 15:02:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78468 states. [2020-07-20 15:02:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78468 states to 78468 states and 100767 transitions. [2020-07-20 15:02:09,653 INFO L78 Accepts]: Start accepts. Automaton has 78468 states and 100767 transitions. Word has length 241 [2020-07-20 15:02:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:09,654 INFO L479 AbstractCegarLoop]: Abstraction has 78468 states and 100767 transitions. [2020-07-20 15:02:09,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:02:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78468 states and 100767 transitions. [2020-07-20 15:02:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:02:09,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:09,656 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] [2020-07-20 15:02:09,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:09,862 INFO L427 AbstractCegarLoop]: === Iteration 24 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1320944188, now seen corresponding path program 1 times [2020-07-20 15:02:09,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:09,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873417276] [2020-07-20 15:02:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:10,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:02:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:10,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:02:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:10,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:10,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873417276] [2020-07-20 15:02:10,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:10,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:02:10,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440716381] [2020-07-20 15:02:10,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:02:10,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:02:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:02:10,181 INFO L87 Difference]: Start difference. First operand 78468 states and 100767 transitions. Second operand 5 states. [2020-07-20 15:02:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:19,492 INFO L93 Difference]: Finished difference Result 237836 states and 312310 transitions. [2020-07-20 15:02:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:02:19,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:02:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:19,843 INFO L225 Difference]: With dead ends: 237836 [2020-07-20 15:02:19,843 INFO L226 Difference]: Without dead ends: 159399 [2020-07-20 15:02:20,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:02:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159399 states. [2020-07-20 15:02:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159399 to 156452. [2020-07-20 15:02:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156452 states. [2020-07-20 15:02:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156452 states to 156452 states and 200395 transitions. [2020-07-20 15:02:30,823 INFO L78 Accepts]: Start accepts. Automaton has 156452 states and 200395 transitions. Word has length 241 [2020-07-20 15:02:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:30,823 INFO L479 AbstractCegarLoop]: Abstraction has 156452 states and 200395 transitions. [2020-07-20 15:02:30,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:02:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 156452 states and 200395 transitions. [2020-07-20 15:02:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:02:30,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:30,824 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] [2020-07-20 15:02:31,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:31,025 INFO L427 AbstractCegarLoop]: === Iteration 25 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:31,026 INFO L82 PathProgramCache]: Analyzing trace with hash -255447744, now seen corresponding path program 1 times [2020-07-20 15:02:31,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:31,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915274690] [2020-07-20 15:02:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:31,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:02:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:02:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:31,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:31,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915274690] [2020-07-20 15:02:31,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:31,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:02:31,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124070771] [2020-07-20 15:02:31,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:02:31,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:02:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:02:31,829 INFO L87 Difference]: Start difference. First operand 156452 states and 200395 transitions. Second operand 5 states. [2020-07-20 15:02:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:02:45,161 INFO L93 Difference]: Finished difference Result 312873 states and 401195 transitions. [2020-07-20 15:02:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:02:45,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:02:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:02:45,494 INFO L225 Difference]: With dead ends: 312873 [2020-07-20 15:02:45,495 INFO L226 Difference]: Without dead ends: 156452 [2020-07-20 15:02:45,653 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 [2020-07-20 15:02:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156452 states. [2020-07-20 15:02:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156452 to 156452. [2020-07-20 15:02:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156452 states. [2020-07-20 15:02:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156452 states to 156452 states and 200011 transitions. [2020-07-20 15:02:53,509 INFO L78 Accepts]: Start accepts. Automaton has 156452 states and 200011 transitions. Word has length 241 [2020-07-20 15:02:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:02:53,509 INFO L479 AbstractCegarLoop]: Abstraction has 156452 states and 200011 transitions. [2020-07-20 15:02:53,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:02:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 156452 states and 200011 transitions. [2020-07-20 15:02:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:02:53,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:02:53,511 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] [2020-07-20 15:02:53,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:53,712 INFO L427 AbstractCegarLoop]: === Iteration 26 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:02:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:02:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1816829372, now seen corresponding path program 1 times [2020-07-20 15:02:53,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:02:53,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274807210] [2020-07-20 15:02:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:02:53,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:02:53,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:02:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:02:53,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:02:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:02:54,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:02:54,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274807210] [2020-07-20 15:02:54,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:02:54,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:02:54,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905371426] [2020-07-20 15:02:54,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:02:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:02:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:02:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:02:54,030 INFO L87 Difference]: Start difference. First operand 156452 states and 200011 transitions. Second operand 5 states. [2020-07-20 15:03:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:06,515 INFO L93 Difference]: Finished difference Result 312873 states and 400427 transitions. [2020-07-20 15:03:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:03:06,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:03:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:06,871 INFO L225 Difference]: With dead ends: 312873 [2020-07-20 15:03:06,871 INFO L226 Difference]: Without dead ends: 156452 [2020-07-20 15:03:07,057 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 [2020-07-20 15:03:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156452 states. [2020-07-20 15:03:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156452 to 156452. [2020-07-20 15:03:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156452 states. [2020-07-20 15:03:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156452 states to 156452 states and 199627 transitions. [2020-07-20 15:03:16,456 INFO L78 Accepts]: Start accepts. Automaton has 156452 states and 199627 transitions. Word has length 241 [2020-07-20 15:03:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:16,457 INFO L479 AbstractCegarLoop]: Abstraction has 156452 states and 199627 transitions. [2020-07-20 15:03:16,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:03:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 156452 states and 199627 transitions. [2020-07-20 15:03:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:03:16,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:16,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:03:16,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:16,659 INFO L427 AbstractCegarLoop]: === Iteration 27 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -743096128, now seen corresponding path program 1 times [2020-07-20 15:03:16,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:16,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908450350] [2020-07-20 15:03:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:16,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:03:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:16,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:03:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:16,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:16,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908450350] [2020-07-20 15:03:16,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:16,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:03:16,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128416105] [2020-07-20 15:03:16,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:03:16,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:03:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:03:16,976 INFO L87 Difference]: Start difference. First operand 156452 states and 199627 transitions. Second operand 5 states. [2020-07-20 15:03:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:31,769 INFO L93 Difference]: Finished difference Result 339882 states and 456549 transitions. [2020-07-20 15:03:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:03:31,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:03:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:32,250 INFO L225 Difference]: With dead ends: 339882 [2020-07-20 15:03:32,250 INFO L226 Difference]: Without dead ends: 183461 [2020-07-20 15:03:32,515 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 [2020-07-20 15:03:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183461 states. [2020-07-20 15:03:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183461 to 175076. [2020-07-20 15:03:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175076 states. [2020-07-20 15:03:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175076 states to 175076 states and 220939 transitions. [2020-07-20 15:03:49,809 INFO L78 Accepts]: Start accepts. Automaton has 175076 states and 220939 transitions. Word has length 241 [2020-07-20 15:03:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:49,810 INFO L479 AbstractCegarLoop]: Abstraction has 175076 states and 220939 transitions. [2020-07-20 15:03:49,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:03:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 175076 states and 220939 transitions. [2020-07-20 15:03:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:03:49,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:49,811 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] [2020-07-20 15:03:50,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:50,012 INFO L427 AbstractCegarLoop]: === Iteration 28 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1827733115, now seen corresponding path program 1 times [2020-07-20 15:03:50,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:50,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552794334] [2020-07-20 15:03:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:50,253 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:03:50,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:03:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:50,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:50,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552794334] [2020-07-20 15:03:50,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:50,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:03:50,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613026450] [2020-07-20 15:03:50,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:03:50,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:50,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:03:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:03:50,620 INFO L87 Difference]: Start difference. First operand 175076 states and 220939 transitions. Second operand 5 states. [2020-07-20 15:04:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:01,223 INFO L93 Difference]: Finished difference Result 350121 states and 442283 transitions. [2020-07-20 15:04:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:04:01,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:04:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:01,625 INFO L225 Difference]: With dead ends: 350121 [2020-07-20 15:04:01,626 INFO L226 Difference]: Without dead ends: 175076 [2020-07-20 15:04:01,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:04:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175076 states. [2020-07-20 15:04:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175076 to 175076. [2020-07-20 15:04:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175076 states. [2020-07-20 15:04:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175076 states to 175076 states and 220555 transitions. [2020-07-20 15:04:19,351 INFO L78 Accepts]: Start accepts. Automaton has 175076 states and 220555 transitions. Word has length 241 [2020-07-20 15:04:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:19,351 INFO L479 AbstractCegarLoop]: Abstraction has 175076 states and 220555 transitions. [2020-07-20 15:04:19,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:04:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 175076 states and 220555 transitions. [2020-07-20 15:04:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:04:19,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:19,353 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] [2020-07-20 15:04:19,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:19,554 INFO L427 AbstractCegarLoop]: === Iteration 29 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2070191223, now seen corresponding path program 1 times [2020-07-20 15:04:19,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:19,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598118769] [2020-07-20 15:04:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:19,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:04:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:19,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598118769] [2020-07-20 15:04:19,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:19,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354501391] [2020-07-20 15:04:19,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:19,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:19,867 INFO L87 Difference]: Start difference. First operand 175076 states and 220555 transitions. Second operand 4 states. [2020-07-20 15:04:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:33,891 INFO L93 Difference]: Finished difference Result 377130 states and 498661 transitions. [2020-07-20 15:04:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:04:33,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-07-20 15:04:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:34,432 INFO L225 Difference]: With dead ends: 377130 [2020-07-20 15:04:34,433 INFO L226 Difference]: Without dead ends: 202085 [2020-07-20 15:04:34,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202085 states. [2020-07-20 15:04:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202085 to 193700. [2020-07-20 15:04:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193700 states. [2020-07-20 15:04:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193700 states to 193700 states and 241611 transitions. [2020-07-20 15:04:53,978 INFO L78 Accepts]: Start accepts. Automaton has 193700 states and 241611 transitions. Word has length 241 [2020-07-20 15:04:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:53,979 INFO L479 AbstractCegarLoop]: Abstraction has 193700 states and 241611 transitions. [2020-07-20 15:04:53,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 193700 states and 241611 transitions. [2020-07-20 15:04:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:04:53,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:53,981 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] [2020-07-20 15:04:54,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:54,182 INFO L427 AbstractCegarLoop]: === Iteration 30 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1797195800, now seen corresponding path program 1 times [2020-07-20 15:04:54,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:54,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735359108] [2020-07-20 15:04:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:54,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:04:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:54,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:54,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735359108] [2020-07-20 15:04:54,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:54,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:04:54,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104816530] [2020-07-20 15:04:54,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:04:54,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:04:54,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:54,485 INFO L87 Difference]: Start difference. First operand 193700 states and 241611 transitions. Second operand 5 states. [2020-07-20 15:05:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:10,623 INFO L93 Difference]: Finished difference Result 400906 states and 511724 transitions. [2020-07-20 15:05:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:05:10,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:05:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:11,138 INFO L225 Difference]: With dead ends: 400906 [2020-07-20 15:05:11,139 INFO L226 Difference]: Without dead ends: 207237 [2020-07-20 15:05:11,870 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 [2020-07-20 15:05:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207237 states. [2020-07-20 15:05:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207237 to 203172. [2020-07-20 15:05:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203172 states. [2020-07-20 15:05:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203172 states to 203172 states and 252011 transitions. [2020-07-20 15:05:31,512 INFO L78 Accepts]: Start accepts. Automaton has 203172 states and 252011 transitions. Word has length 241 [2020-07-20 15:05:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:31,512 INFO L479 AbstractCegarLoop]: Abstraction has 203172 states and 252011 transitions. [2020-07-20 15:05:31,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:05:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 203172 states and 252011 transitions. [2020-07-20 15:05:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:05:31,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:31,514 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] [2020-07-20 15:05:31,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:31,715 INFO L427 AbstractCegarLoop]: === Iteration 31 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash -287710740, now seen corresponding path program 1 times [2020-07-20 15:05:31,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:31,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189849352] [2020-07-20 15:05:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:31,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:05:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:05:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:32,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:32,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189849352] [2020-07-20 15:05:32,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:32,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:05:32,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820386345] [2020-07-20 15:05:32,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:05:32,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:05:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:32,016 INFO L87 Difference]: Start difference. First operand 203172 states and 252011 transitions. Second operand 5 states. [2020-07-20 15:05:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:48,156 INFO L93 Difference]: Finished difference Result 406313 states and 504427 transitions. [2020-07-20 15:05:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:05:48,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:05:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:54,771 INFO L225 Difference]: With dead ends: 406313 [2020-07-20 15:05:54,771 INFO L226 Difference]: Without dead ends: 203172 [2020-07-20 15:05:54,963 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 [2020-07-20 15:05:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203172 states. [2020-07-20 15:06:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203172 to 203172. [2020-07-20 15:06:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203172 states. [2020-07-20 15:06:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203172 states to 203172 states and 251627 transitions. [2020-07-20 15:06:08,264 INFO L78 Accepts]: Start accepts. Automaton has 203172 states and 251627 transitions. Word has length 241 [2020-07-20 15:06:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:08,265 INFO L479 AbstractCegarLoop]: Abstraction has 203172 states and 251627 transitions. [2020-07-20 15:06:08,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:06:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 203172 states and 251627 transitions. [2020-07-20 15:06:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:06:08,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:08,267 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] [2020-07-20 15:06:08,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:08,481 INFO L427 AbstractCegarLoop]: === Iteration 32 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1089941352, now seen corresponding path program 1 times [2020-07-20 15:06:08,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:08,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846300403] [2020-07-20 15:06:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:08,716 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:06:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:06:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:08,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:08,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846300403] [2020-07-20 15:06:08,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:08,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:06:08,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694816540] [2020-07-20 15:06:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:06:08,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:06:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:08,764 INFO L87 Difference]: Start difference. First operand 203172 states and 251627 transitions. Second operand 5 states. [2020-07-20 15:06:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:32,551 INFO L93 Difference]: Finished difference Result 419850 states and 531804 transitions. [2020-07-20 15:06:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:06:32,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:06:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:33,096 INFO L225 Difference]: With dead ends: 419850 [2020-07-20 15:06:33,096 INFO L226 Difference]: Without dead ends: 216709 [2020-07-20 15:06:33,347 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 [2020-07-20 15:06:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216709 states. [2020-07-20 15:06:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216709 to 212644. [2020-07-20 15:06:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212644 states. [2020-07-20 15:06:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212644 states to 212644 states and 261931 transitions. [2020-07-20 15:06:48,758 INFO L78 Accepts]: Start accepts. Automaton has 212644 states and 261931 transitions. Word has length 241 [2020-07-20 15:06:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:48,759 INFO L479 AbstractCegarLoop]: Abstraction has 212644 states and 261931 transitions. [2020-07-20 15:06:48,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:06:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 212644 states and 261931 transitions. [2020-07-20 15:06:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:06:48,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:48,760 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] [2020-07-20 15:06:48,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:48,961 INFO L427 AbstractCegarLoop]: === Iteration 33 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash 639337956, now seen corresponding path program 1 times [2020-07-20 15:06:48,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:48,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199205048] [2020-07-20 15:06:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:49,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:06:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:06:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:49,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:49,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199205048] [2020-07-20 15:06:49,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:49,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 15:06:49,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781560144] [2020-07-20 15:06:49,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 15:06:49,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 15:06:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:49,252 INFO L87 Difference]: Start difference. First operand 212644 states and 261931 transitions. Second operand 5 states. [2020-07-20 15:07:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:14,525 INFO L93 Difference]: Finished difference Result 452202 states and 581797 transitions. [2020-07-20 15:07:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:07:14,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 15:07:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:15,194 INFO L225 Difference]: With dead ends: 452202 [2020-07-20 15:07:15,195 INFO L226 Difference]: Without dead ends: 239589 [2020-07-20 15:07:15,594 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 [2020-07-20 15:07:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239589 states. [2020-07-20 15:07:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239589 to 231076. [2020-07-20 15:07:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231076 states. [2020-07-20 15:07:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231076 states to 231076 states and 282219 transitions. [2020-07-20 15:07:33,444 INFO L78 Accepts]: Start accepts. Automaton has 231076 states and 282219 transitions. Word has length 241 [2020-07-20 15:07:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:33,444 INFO L479 AbstractCegarLoop]: Abstraction has 231076 states and 282219 transitions. [2020-07-20 15:07:33,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 15:07:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 231076 states and 282219 transitions. [2020-07-20 15:07:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:07:33,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:33,446 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] [2020-07-20 15:07:33,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:33,658 INFO L427 AbstractCegarLoop]: === Iteration 34 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1513632280, now seen corresponding path program 1 times [2020-07-20 15:07:33,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:33,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827548348] [2020-07-20 15:07:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:33,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:07:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:07:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:34,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:34,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827548348] [2020-07-20 15:07:34,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:34,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:07:34,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379598390] [2020-07-20 15:07:34,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:07:34,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:07:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:07:34,397 INFO L87 Difference]: Start difference. First operand 231076 states and 282219 transitions. Second operand 6 states. [2020-07-20 15:07:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:56,907 INFO L93 Difference]: Finished difference Result 479256 states and 595968 transitions. [2020-07-20 15:07:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:07:56,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-20 15:07:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:57,565 INFO L225 Difference]: With dead ends: 479256 [2020-07-20 15:07:57,565 INFO L226 Difference]: Without dead ends: 248212 [2020-07-20 15:07:57,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:07:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248212 states. [2020-07-20 15:08:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248212 to 247316. [2020-07-20 15:08:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247316 states. [2020-07-20 15:08:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247316 states to 247316 states and 305579 transitions. [2020-07-20 15:08:15,471 INFO L78 Accepts]: Start accepts. Automaton has 247316 states and 305579 transitions. Word has length 241 [2020-07-20 15:08:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:15,471 INFO L479 AbstractCegarLoop]: Abstraction has 247316 states and 305579 transitions. [2020-07-20 15:08:15,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 15:08:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 247316 states and 305579 transitions. [2020-07-20 15:08:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:08:15,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:15,473 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, 1] [2020-07-20 15:08:15,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:15,674 INFO L427 AbstractCegarLoop]: === Iteration 35 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1423571990, now seen corresponding path program 1 times [2020-07-20 15:08:15,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:15,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071923756] [2020-07-20 15:08:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:15,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:08:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:15,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:08:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:15,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:15,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071923756] [2020-07-20 15:08:15,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:15,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:08:15,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197955694] [2020-07-20 15:08:15,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:08:15,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:08:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:08:15,970 INFO L87 Difference]: Start difference. First operand 247316 states and 305579 transitions. Second operand 6 states. [2020-07-20 15:08:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:43,580 INFO L93 Difference]: Finished difference Result 565832 states and 732593 transitions. [2020-07-20 15:08:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:08:43,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-20 15:08:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:44,437 INFO L225 Difference]: With dead ends: 565832 [2020-07-20 15:08:44,437 INFO L226 Difference]: Without dead ends: 318548 [2020-07-20 15:08:45,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:08:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318548 states. [2020-07-20 15:09:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318548 to 254708. [2020-07-20 15:09:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254708 states. [2020-07-20 15:09:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254708 states to 254708 states and 313307 transitions. [2020-07-20 15:09:05,657 INFO L78 Accepts]: Start accepts. Automaton has 254708 states and 313307 transitions. Word has length 241 [2020-07-20 15:09:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:05,658 INFO L479 AbstractCegarLoop]: Abstraction has 254708 states and 313307 transitions. [2020-07-20 15:09:05,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 15:09:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 254708 states and 313307 transitions. [2020-07-20 15:09:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:09:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:05,659 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] [2020-07-20 15:09:05,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:05,861 INFO L427 AbstractCegarLoop]: === Iteration 36 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2085397416, now seen corresponding path program 1 times [2020-07-20 15:09:05,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:05,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214623683] [2020-07-20 15:09:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:06,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:09:06,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:09:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:09:06,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:06,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214623683] [2020-07-20 15:09:06,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:06,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:09:06,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529747789] [2020-07-20 15:09:06,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:09:06,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:06,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:09:06,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:09:06,148 INFO L87 Difference]: Start difference. First operand 254708 states and 313307 transitions. Second operand 6 states. [2020-07-20 15:09:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:30,157 INFO L93 Difference]: Finished difference Result 515688 states and 643968 transitions. [2020-07-20 15:09:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:09:30,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-20 15:09:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:30,837 INFO L225 Difference]: With dead ends: 515688 [2020-07-20 15:09:30,837 INFO L226 Difference]: Without dead ends: 261012 [2020-07-20 15:09:31,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:09:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261012 states. [2020-07-20 15:09:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261012 to 255412. [2020-07-20 15:09:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255412 states. [2020-07-20 15:09:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255412 states to 255412 states and 312523 transitions. [2020-07-20 15:09:49,968 INFO L78 Accepts]: Start accepts. Automaton has 255412 states and 312523 transitions. Word has length 241 [2020-07-20 15:09:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:09:49,969 INFO L479 AbstractCegarLoop]: Abstraction has 255412 states and 312523 transitions. [2020-07-20 15:09:49,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 15:09:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 255412 states and 312523 transitions. [2020-07-20 15:09:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:09:49,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:09:49,970 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] [2020-07-20 15:09:50,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:50,174 INFO L427 AbstractCegarLoop]: === Iteration 37 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:09:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:09:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash -762989014, now seen corresponding path program 1 times [2020-07-20 15:09:50,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:09:50,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532596008] [2020-07-20 15:09:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:09:50,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:09:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:09:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:09:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:09:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:09:50,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:09:50,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532596008] [2020-07-20 15:09:50,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:09:50,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:09:50,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229977026] [2020-07-20 15:09:50,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:09:50,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:09:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:09:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:09:50,984 INFO L87 Difference]: Start difference. First operand 255412 states and 312523 transitions. Second operand 6 states. [2020-07-20 15:10:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:10:15,033 INFO L93 Difference]: Finished difference Result 513704 states and 636976 transitions. [2020-07-20 15:10:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:10:15,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-20 15:10:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:10:15,786 INFO L225 Difference]: With dead ends: 513704 [2020-07-20 15:10:15,786 INFO L226 Difference]: Without dead ends: 258324 [2020-07-20 15:10:16,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:10:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258324 states. [2020-07-20 15:10:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258324 to 255764. [2020-07-20 15:10:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255764 states. [2020-07-20 15:10:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255764 states to 255764 states and 311291 transitions. [2020-07-20 15:10:34,794 INFO L78 Accepts]: Start accepts. Automaton has 255764 states and 311291 transitions. Word has length 241 [2020-07-20 15:10:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:34,795 INFO L479 AbstractCegarLoop]: Abstraction has 255764 states and 311291 transitions. [2020-07-20 15:10:34,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 15:10:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 255764 states and 311291 transitions. [2020-07-20 15:10:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:10:34,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:34,796 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] [2020-07-20 15:10:35,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:35,008 INFO L427 AbstractCegarLoop]: === Iteration 38 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1303418520, now seen corresponding path program 1 times [2020-07-20 15:10:35,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:35,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584834592] [2020-07-20 15:10:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:35,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:10:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:10:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:10:35,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:35,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584834592] [2020-07-20 15:10:35,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:35,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:10:35,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336826081] [2020-07-20 15:10:35,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:10:35,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:10:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:10:35,309 INFO L87 Difference]: Start difference. First operand 255764 states and 311291 transitions. Second operand 6 states. [2020-07-20 15:11:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:00,100 INFO L93 Difference]: Finished difference Result 512832 states and 632000 transitions. [2020-07-20 15:11:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 15:11:00,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-20 15:11:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:00,834 INFO L225 Difference]: With dead ends: 512832 [2020-07-20 15:11:00,834 INFO L226 Difference]: Without dead ends: 257100 [2020-07-20 15:11:01,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 15:11:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257100 states. [2020-07-20 15:11:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257100 to 255940. [2020-07-20 15:11:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255940 states. [2020-07-20 15:11:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255940 states to 255940 states and 309835 transitions. [2020-07-20 15:11:20,152 INFO L78 Accepts]: Start accepts. Automaton has 255940 states and 309835 transitions. Word has length 241 [2020-07-20 15:11:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:20,152 INFO L479 AbstractCegarLoop]: Abstraction has 255940 states and 309835 transitions. [2020-07-20 15:11:20,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 15:11:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 255940 states and 309835 transitions. [2020-07-20 15:11:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 15:11:20,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:20,154 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] [2020-07-20 15:11:20,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:20,368 INFO L427 AbstractCegarLoop]: === Iteration 39 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -939952022, now seen corresponding path program 1 times [2020-07-20 15:11:20,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:20,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957957699] [2020-07-20 15:11:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:20,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:11:20,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 15:11:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:20,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:20,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957957699] [2020-07-20 15:11:20,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:20,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 15:11:20,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422109318] [2020-07-20 15:11:20,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 15:11:20,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 15:11:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 15:11:20,666 INFO L87 Difference]: Start difference. First operand 255940 states and 309835 transitions. Second operand 6 states.