/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:22:37,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:22:37,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:22:38,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:22:38,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:22:38,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:22:38,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:22:38,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:22:38,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:22:38,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:22:38,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:22:38,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:22:38,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:22:38,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:22:38,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:22:38,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:22:38,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:22:38,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:22:38,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:22:38,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:22:38,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:22:38,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:22:38,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:22:38,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:22:38,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:22:38,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:22:38,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:22:38,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:22:38,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:22:38,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:22:38,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:22:38,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:22:38,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:22:38,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:22:38,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:22:38,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:22:38,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:22:38,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:22:38,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:22:38,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:22:38,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:22:38,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:22:38,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:22:38,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:22:38,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:22:38,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:22:38,080 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:22:38,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:22:38,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:22:38,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:22:38,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:22:38,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:22:38,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:22:38,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:22:38,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:22:38,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:22:38,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:22:38,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:22:38,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:22:38,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:22:38,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:22:38,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:22:38,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:22:38,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:38,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:22:38,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:22:38,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:22:38,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:22:38,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:22:38,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:22:38,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:22:38,379 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:22:38,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 17:22:38,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315481e7/b8f803907eed4665900eaa7e06e684c8/FLAG273da8e30 [2020-07-21 17:22:39,021 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:22:39,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 17:22:39,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315481e7/b8f803907eed4665900eaa7e06e684c8/FLAG273da8e30 [2020-07-21 17:22:39,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315481e7/b8f803907eed4665900eaa7e06e684c8 [2020-07-21 17:22:39,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:22:39,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:22:39,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:22:39,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:22:39,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:22:39,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:39,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798c2c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39, skipping insertion in model container [2020-07-21 17:22:39,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:39,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:22:39,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:22:39,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:22:39,741 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:22:39,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:22:39,974 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:22:39,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39 WrapperNode [2020-07-21 17:22:39,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:22:39,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:22:39,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:22:39,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:22:39,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:39,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... [2020-07-21 17:22:40,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:22:40,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:22:40,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:22:40,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:22:40,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:22:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:22:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:22:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 17:22:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 17:22:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 17:22:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 17:22:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 17:22:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 17:22:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 17:22:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 17:22:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 17:22:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 17:22:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 17:22:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 17:22:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 17:22:40,156 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 17:22:40,156 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 17:22:40,156 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 17:22:40,157 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 17:22:40,158 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 17:22:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 17:22:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 17:22:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 17:22:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 17:22:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 17:22:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 17:22:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 17:22:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 17:22:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 17:22:40,163 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 17:22:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:22:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:22:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:22:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 17:22:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 17:22:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 17:22:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 17:22:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 17:22:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 17:22:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 17:22:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 17:22:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 17:22:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 17:22:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-21 17:22:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 17:22:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 17:22:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 17:22:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 17:22:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 17:22:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 17:22:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 17:22:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 17:22:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 17:22:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 17:22:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 17:22:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 17:22:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 17:22:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 17:22:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 17:22:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 17:22:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 17:22:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 17:22:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:22:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:22:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:22:41,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:22:41,475 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 17:22:41,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:22:41 BoogieIcfgContainer [2020-07-21 17:22:41,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:22:41,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:22:41,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:22:41,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:22:41,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:22:39" (1/3) ... [2020-07-21 17:22:41,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce4058a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:22:41, skipping insertion in model container [2020-07-21 17:22:41,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:22:39" (2/3) ... [2020-07-21 17:22:41,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce4058a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:22:41, skipping insertion in model container [2020-07-21 17:22:41,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:22:41" (3/3) ... [2020-07-21 17:22:41,494 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-21 17:22:41,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:22:41,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:22:41,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:22:41,563 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:22:41,564 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:22:41,564 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:22:41,564 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:22:41,565 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:22:41,565 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:22:41,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:22:41,565 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:22:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-21 17:22:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 17:22:41,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:41,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:41,619 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-21 17:22:41,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:41,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625440732] [2020-07-21 17:22:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:41,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:22:41,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:42,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:42,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625440732] [2020-07-21 17:22:42,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:42,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:42,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467923322] [2020-07-21 17:22:42,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:42,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:42,162 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-21 17:22:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:42,289 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-21 17:22:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:42,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 17:22:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:42,314 INFO L225 Difference]: With dead ends: 1034 [2020-07-21 17:22:42,314 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 17:22:42,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 17:22:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 17:22:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 17:22:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-21 17:22:42,453 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-21 17:22:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:42,454 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-21 17:22:42,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-21 17:22:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 17:22:42,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:42,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:42,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:42,673 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-21 17:22:42,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:42,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142887931] [2020-07-21 17:22:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:42,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:22:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:43,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:43,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142887931] [2020-07-21 17:22:43,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:43,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:43,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031713566] [2020-07-21 17:22:43,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:43,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:43,046 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-21 17:22:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:43,093 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-21 17:22:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:43,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 17:22:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:43,102 INFO L225 Difference]: With dead ends: 1010 [2020-07-21 17:22:43,102 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 17:22:43,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 17:22:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 17:22:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 17:22:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-21 17:22:43,145 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-21 17:22:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:43,146 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-21 17:22:43,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-21 17:22:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 17:22:43,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:43,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:43,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:43,365 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-21 17:22:43,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:43,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749624472] [2020-07-21 17:22:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:43,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:43,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:43,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749624472] [2020-07-21 17:22:43,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:43,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:43,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740002423] [2020-07-21 17:22:43,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:43,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:43,858 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-21 17:22:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:43,992 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-21 17:22:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:43,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 17:22:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:44,001 INFO L225 Difference]: With dead ends: 1479 [2020-07-21 17:22:44,001 INFO L226 Difference]: Without dead ends: 996 [2020-07-21 17:22:44,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-21 17:22:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-21 17:22:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-21 17:22:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-21 17:22:44,071 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-21 17:22:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:44,073 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-21 17:22:44,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-21 17:22:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:44,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:44,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:44,296 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-21 17:22:44,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:44,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60013358] [2020-07-21 17:22:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:44,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:22:44,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:44,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:44,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60013358] [2020-07-21 17:22:44,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:44,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 17:22:44,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543091034] [2020-07-21 17:22:44,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:22:44,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:22:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:22:44,818 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 6 states. [2020-07-21 17:22:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:44,931 INFO L93 Difference]: Finished difference Result 1997 states and 3101 transitions. [2020-07-21 17:22:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:22:44,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 17:22:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:44,939 INFO L225 Difference]: With dead ends: 1997 [2020-07-21 17:22:44,940 INFO L226 Difference]: Without dead ends: 1058 [2020-07-21 17:22:44,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:22:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-07-21 17:22:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1000. [2020-07-21 17:22:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-07-21 17:22:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1498 transitions. [2020-07-21 17:22:45,002 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1498 transitions. Word has length 255 [2020-07-21 17:22:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:45,002 INFO L479 AbstractCegarLoop]: Abstraction has 1000 states and 1498 transitions. [2020-07-21 17:22:45,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:22:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1498 transitions. [2020-07-21 17:22:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:45,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:45,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:45,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:45,221 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -660621370, now seen corresponding path program 1 times [2020-07-21 17:22:45,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:45,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737672591] [2020-07-21 17:22:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:45,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:22:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:45,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:45,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737672591] [2020-07-21 17:22:45,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:45,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 17:22:45,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92662840] [2020-07-21 17:22:45,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:22:45,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:22:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:22:45,690 INFO L87 Difference]: Start difference. First operand 1000 states and 1498 transitions. Second operand 6 states. [2020-07-21 17:22:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:45,777 INFO L93 Difference]: Finished difference Result 2005 states and 3101 transitions. [2020-07-21 17:22:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:22:45,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 17:22:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:45,785 INFO L225 Difference]: With dead ends: 2005 [2020-07-21 17:22:45,785 INFO L226 Difference]: Without dead ends: 1056 [2020-07-21 17:22:45,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:22:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2020-07-21 17:22:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1010. [2020-07-21 17:22:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-07-21 17:22:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1508 transitions. [2020-07-21 17:22:45,840 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1508 transitions. Word has length 255 [2020-07-21 17:22:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:45,841 INFO L479 AbstractCegarLoop]: Abstraction has 1010 states and 1508 transitions. [2020-07-21 17:22:45,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:22:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1508 transitions. [2020-07-21 17:22:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:45,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:45,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:46,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:46,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1061381316, now seen corresponding path program 1 times [2020-07-21 17:22:46,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:46,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274432296] [2020-07-21 17:22:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:46,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:22:46,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:46,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274432296] [2020-07-21 17:22:46,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:46,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 17:22:46,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957891655] [2020-07-21 17:22:46,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:22:46,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:22:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:22:46,503 INFO L87 Difference]: Start difference. First operand 1010 states and 1508 transitions. Second operand 6 states. [2020-07-21 17:22:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:46,584 INFO L93 Difference]: Finished difference Result 2013 states and 3101 transitions. [2020-07-21 17:22:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:22:46,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 17:22:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:46,597 INFO L225 Difference]: With dead ends: 2013 [2020-07-21 17:22:46,597 INFO L226 Difference]: Without dead ends: 1054 [2020-07-21 17:22:46,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:22:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-07-21 17:22:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1020. [2020-07-21 17:22:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2020-07-21 17:22:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1518 transitions. [2020-07-21 17:22:46,659 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1518 transitions. Word has length 255 [2020-07-21 17:22:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:46,660 INFO L479 AbstractCegarLoop]: Abstraction has 1020 states and 1518 transitions. [2020-07-21 17:22:46,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:22:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1518 transitions. [2020-07-21 17:22:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:46,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:46,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:46,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:46,881 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash 30340418, now seen corresponding path program 1 times [2020-07-21 17:22:46,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:46,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998453158] [2020-07-21 17:22:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:47,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:47,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2244 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:22:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:47,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:47,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998453158] [2020-07-21 17:22:47,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:47,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 17:22:47,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966670521] [2020-07-21 17:22:47,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:22:47,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:22:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:22:47,309 INFO L87 Difference]: Start difference. First operand 1020 states and 1518 transitions. Second operand 6 states. [2020-07-21 17:22:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:47,381 INFO L93 Difference]: Finished difference Result 2009 states and 3081 transitions. [2020-07-21 17:22:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:22:47,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-21 17:22:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:47,389 INFO L225 Difference]: With dead ends: 2009 [2020-07-21 17:22:47,389 INFO L226 Difference]: Without dead ends: 1040 [2020-07-21 17:22:47,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:22:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-07-21 17:22:47,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1030. [2020-07-21 17:22:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-07-21 17:22:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1528 transitions. [2020-07-21 17:22:47,440 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1528 transitions. Word has length 255 [2020-07-21 17:22:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:47,440 INFO L479 AbstractCegarLoop]: Abstraction has 1030 states and 1528 transitions. [2020-07-21 17:22:47,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:22:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1528 transitions. [2020-07-21 17:22:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:47,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:47,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:47,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:47,661 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 447737024, now seen corresponding path program 1 times [2020-07-21 17:22:47,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:47,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746559544] [2020-07-21 17:22:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:48,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:48,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2245 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:48,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:48,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746559544] [2020-07-21 17:22:48,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:48,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254799621] [2020-07-21 17:22:48,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:48,119 INFO L87 Difference]: Start difference. First operand 1030 states and 1528 transitions. Second operand 3 states. [2020-07-21 17:22:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:48,221 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2020-07-21 17:22:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:48,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:48,236 INFO L225 Difference]: With dead ends: 2964 [2020-07-21 17:22:48,236 INFO L226 Difference]: Without dead ends: 1985 [2020-07-21 17:22:48,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-07-21 17:22:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1978. [2020-07-21 17:22:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-07-21 17:22:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2938 transitions. [2020-07-21 17:22:48,348 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2938 transitions. Word has length 255 [2020-07-21 17:22:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:48,349 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2938 transitions. [2020-07-21 17:22:48,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2938 transitions. [2020-07-21 17:22:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:48,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:48,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:48,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:48,568 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1762377469, now seen corresponding path program 1 times [2020-07-21 17:22:48,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:48,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294136992] [2020-07-21 17:22:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:48,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:48,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:49,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:49,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294136992] [2020-07-21 17:22:49,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:49,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:49,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858864585] [2020-07-21 17:22:49,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:49,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:49,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:49,063 INFO L87 Difference]: Start difference. First operand 1978 states and 2938 transitions. Second operand 3 states. [2020-07-21 17:22:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:49,194 INFO L93 Difference]: Finished difference Result 5822 states and 8840 transitions. [2020-07-21 17:22:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:49,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:49,219 INFO L225 Difference]: With dead ends: 5822 [2020-07-21 17:22:49,219 INFO L226 Difference]: Without dead ends: 3895 [2020-07-21 17:22:49,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2020-07-21 17:22:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3886. [2020-07-21 17:22:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3886 states. [2020-07-21 17:22:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5775 transitions. [2020-07-21 17:22:49,392 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5775 transitions. Word has length 255 [2020-07-21 17:22:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:49,393 INFO L479 AbstractCegarLoop]: Abstraction has 3886 states and 5775 transitions. [2020-07-21 17:22:49,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5775 transitions. [2020-07-21 17:22:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:49,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:49,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:49,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:49,612 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -506779422, now seen corresponding path program 1 times [2020-07-21 17:22:49,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:49,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387396171] [2020-07-21 17:22:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:49,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:50,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:50,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387396171] [2020-07-21 17:22:50,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:50,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:50,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271418686] [2020-07-21 17:22:50,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:50,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:50,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:50,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:50,078 INFO L87 Difference]: Start difference. First operand 3886 states and 5775 transitions. Second operand 3 states. [2020-07-21 17:22:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:50,279 INFO L93 Difference]: Finished difference Result 11466 states and 17450 transitions. [2020-07-21 17:22:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:50,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:50,327 INFO L225 Difference]: With dead ends: 11466 [2020-07-21 17:22:50,327 INFO L226 Difference]: Without dead ends: 7631 [2020-07-21 17:22:50,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2020-07-21 17:22:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 7612. [2020-07-21 17:22:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7612 states. [2020-07-21 17:22:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 11359 transitions. [2020-07-21 17:22:50,747 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 11359 transitions. Word has length 255 [2020-07-21 17:22:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:50,748 INFO L479 AbstractCegarLoop]: Abstraction has 7612 states and 11359 transitions. [2020-07-21 17:22:50,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 11359 transitions. [2020-07-21 17:22:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:50,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:50,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:50,967 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1068623899, now seen corresponding path program 1 times [2020-07-21 17:22:50,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:50,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121921005] [2020-07-21 17:22:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:51,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:51,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:51,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:51,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121921005] [2020-07-21 17:22:51,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:51,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:51,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128125841] [2020-07-21 17:22:51,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:51,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:51,458 INFO L87 Difference]: Start difference. First operand 7612 states and 11359 transitions. Second operand 3 states. [2020-07-21 17:22:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:51,811 INFO L93 Difference]: Finished difference Result 22556 states and 34534 transitions. [2020-07-21 17:22:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:51,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:51,909 INFO L225 Difference]: With dead ends: 22556 [2020-07-21 17:22:51,909 INFO L226 Difference]: Without dead ends: 14995 [2020-07-21 17:22:51,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14995 states. [2020-07-21 17:22:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14995 to 14960. [2020-07-21 17:22:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14960 states. [2020-07-21 17:22:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14960 states to 14960 states and 22457 transitions. [2020-07-21 17:22:52,996 INFO L78 Accepts]: Start accepts. Automaton has 14960 states and 22457 transitions. Word has length 255 [2020-07-21 17:22:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:52,997 INFO L479 AbstractCegarLoop]: Abstraction has 14960 states and 22457 transitions. [2020-07-21 17:22:52,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 14960 states and 22457 transitions. [2020-07-21 17:22:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:53,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:53,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:53,216 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash 602533418, now seen corresponding path program 1 times [2020-07-21 17:22:53,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:53,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907472868] [2020-07-21 17:22:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:53,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:22:53,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:22:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:53,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:53,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907472868] [2020-07-21 17:22:53,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:53,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:53,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583923824] [2020-07-21 17:22:53,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:53,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:53,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:53,453 INFO L87 Difference]: Start difference. First operand 14960 states and 22457 transitions. Second operand 3 states. [2020-07-21 17:22:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:53,797 INFO L93 Difference]: Finished difference Result 27456 states and 40690 transitions. [2020-07-21 17:22:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:53,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:53,870 INFO L225 Difference]: With dead ends: 27456 [2020-07-21 17:22:53,870 INFO L226 Difference]: Without dead ends: 12529 [2020-07-21 17:22:53,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2020-07-21 17:22:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 12529. [2020-07-21 17:22:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12529 states. [2020-07-21 17:22:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12529 states to 12529 states and 18281 transitions. [2020-07-21 17:22:55,121 INFO L78 Accepts]: Start accepts. Automaton has 12529 states and 18281 transitions. Word has length 255 [2020-07-21 17:22:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:55,122 INFO L479 AbstractCegarLoop]: Abstraction has 12529 states and 18281 transitions. [2020-07-21 17:22:55,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 12529 states and 18281 transitions. [2020-07-21 17:22:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:55,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:55,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:55,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:55,339 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash 249876904, now seen corresponding path program 1 times [2020-07-21 17:22:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:55,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956186079] [2020-07-21 17:22:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:55,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:55,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:55,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:55,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956186079] [2020-07-21 17:22:55,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:55,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:55,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739201117] [2020-07-21 17:22:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:55,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:55,764 INFO L87 Difference]: Start difference. First operand 12529 states and 18281 transitions. Second operand 3 states. [2020-07-21 17:22:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:22:56,497 INFO L93 Difference]: Finished difference Result 37280 states and 55796 transitions. [2020-07-21 17:22:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:22:56,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:22:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:22:56,613 INFO L225 Difference]: With dead ends: 37280 [2020-07-21 17:22:56,613 INFO L226 Difference]: Without dead ends: 24784 [2020-07-21 17:22:56,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24784 states. [2020-07-21 17:22:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24784 to 24733. [2020-07-21 17:22:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24733 states. [2020-07-21 17:22:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24733 states to 24733 states and 36347 transitions. [2020-07-21 17:22:57,610 INFO L78 Accepts]: Start accepts. Automaton has 24733 states and 36347 transitions. Word has length 255 [2020-07-21 17:22:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:22:57,611 INFO L479 AbstractCegarLoop]: Abstraction has 24733 states and 36347 transitions. [2020-07-21 17:22:57,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:22:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24733 states and 36347 transitions. [2020-07-21 17:22:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:22:57,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:22:57,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:22:57,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:57,829 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:22:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:22:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 970109163, now seen corresponding path program 1 times [2020-07-21 17:22:57,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:22:57,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930969699] [2020-07-21 17:22:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:22:58,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:22:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:22:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:22:58,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:22:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:22:58,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:22:58,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930969699] [2020-07-21 17:22:58,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:22:58,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:22:58,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760316134] [2020-07-21 17:22:58,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:22:58,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:22:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:22:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:22:58,379 INFO L87 Difference]: Start difference. First operand 24733 states and 36347 transitions. Second operand 3 states. [2020-07-21 17:23:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:00,005 INFO L93 Difference]: Finished difference Result 73828 states and 111342 transitions. [2020-07-21 17:23:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:00,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:23:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:00,191 INFO L225 Difference]: With dead ends: 73828 [2020-07-21 17:23:00,192 INFO L226 Difference]: Without dead ends: 49128 [2020-07-21 17:23:00,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49128 states. [2020-07-21 17:23:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49128 to 49029. [2020-07-21 17:23:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49029 states. [2020-07-21 17:23:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49029 states to 49029 states and 72601 transitions. [2020-07-21 17:23:03,367 INFO L78 Accepts]: Start accepts. Automaton has 49029 states and 72601 transitions. Word has length 255 [2020-07-21 17:23:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:23:03,368 INFO L479 AbstractCegarLoop]: Abstraction has 49029 states and 72601 transitions. [2020-07-21 17:23:03,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:23:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 49029 states and 72601 transitions. [2020-07-21 17:23:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:23:03,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:23:03,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:23:03,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:03,583 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:23:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:23:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1325705610, now seen corresponding path program 1 times [2020-07-21 17:23:03,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:23:03,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764002359] [2020-07-21 17:23:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:03,898 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:23:03,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:23:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:23:03,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:23:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:23:03,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:23:03,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764002359] [2020-07-21 17:23:03,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:23:03,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:23:03,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146404126] [2020-07-21 17:23:03,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:23:03,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:23:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:23:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:03,979 INFO L87 Difference]: Start difference. First operand 49029 states and 72601 transitions. Second operand 3 states. [2020-07-21 17:23:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:06,248 INFO L93 Difference]: Finished difference Result 146412 states and 223508 transitions. [2020-07-21 17:23:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:06,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:23:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:06,524 INFO L225 Difference]: With dead ends: 146412 [2020-07-21 17:23:06,525 INFO L226 Difference]: Without dead ends: 97416 [2020-07-21 17:23:06,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97416 states. [2020-07-21 17:23:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97416 to 97221. [2020-07-21 17:23:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97221 states. [2020-07-21 17:23:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97221 states to 97221 states and 145635 transitions. [2020-07-21 17:23:11,769 INFO L78 Accepts]: Start accepts. Automaton has 97221 states and 145635 transitions. Word has length 255 [2020-07-21 17:23:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:23:11,770 INFO L479 AbstractCegarLoop]: Abstraction has 97221 states and 145635 transitions. [2020-07-21 17:23:11,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:23:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 97221 states and 145635 transitions. [2020-07-21 17:23:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:23:11,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:23:11,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:23:11,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:11,985 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:23:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:23:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 48552937, now seen corresponding path program 1 times [2020-07-21 17:23:11,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:23:11,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894258678] [2020-07-21 17:23:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:12,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:23:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:23:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:23:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:23:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:23:12,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:23:12,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894258678] [2020-07-21 17:23:12,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:23:12,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:23:12,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889649752] [2020-07-21 17:23:12,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:23:12,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:23:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:23:12,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:12,368 INFO L87 Difference]: Start difference. First operand 97221 states and 145635 transitions. Second operand 3 states. [2020-07-21 17:23:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:18,127 INFO L93 Difference]: Finished difference Result 290380 states and 451558 transitions. [2020-07-21 17:23:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:18,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:23:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:18,733 INFO L225 Difference]: With dead ends: 290380 [2020-07-21 17:23:18,733 INFO L226 Difference]: Without dead ends: 193192 [2020-07-21 17:23:19,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193192 states. [2020-07-21 17:23:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193192 to 192805. [2020-07-21 17:23:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192805 states. [2020-07-21 17:23:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192805 states to 192805 states and 293889 transitions. [2020-07-21 17:23:29,068 INFO L78 Accepts]: Start accepts. Automaton has 192805 states and 293889 transitions. Word has length 255 [2020-07-21 17:23:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:23:29,068 INFO L479 AbstractCegarLoop]: Abstraction has 192805 states and 293889 transitions. [2020-07-21 17:23:29,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:23:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 192805 states and 293889 transitions. [2020-07-21 17:23:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:23:29,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:23:29,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:23:29,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:29,285 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:23:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:23:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2000899464, now seen corresponding path program 1 times [2020-07-21 17:23:29,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:23:29,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805728091] [2020-07-21 17:23:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:23:29,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:23:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:23:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:23:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:23:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:23:29,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:23:29,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805728091] [2020-07-21 17:23:29,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:23:29,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:23:29,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839484626] [2020-07-21 17:23:29,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:23:29,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:23:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:23:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:29,706 INFO L87 Difference]: Start difference. First operand 192805 states and 293889 transitions. Second operand 3 states. [2020-07-21 17:23:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:23:41,734 INFO L93 Difference]: Finished difference Result 577068 states and 923452 transitions. [2020-07-21 17:23:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:23:41,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 17:23:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:23:50,198 INFO L225 Difference]: With dead ends: 577068 [2020-07-21 17:23:50,199 INFO L226 Difference]: Without dead ends: 384296 [2020-07-21 17:23:51,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:23:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384296 states. [2020-07-21 17:24:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384296 to 383525. [2020-07-21 17:24:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383525 states. [2020-07-21 17:24:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383525 states to 383525 states and 599963 transitions. [2020-07-21 17:24:14,947 INFO L78 Accepts]: Start accepts. Automaton has 383525 states and 599963 transitions. Word has length 255 [2020-07-21 17:24:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:14,948 INFO L479 AbstractCegarLoop]: Abstraction has 383525 states and 599963 transitions. [2020-07-21 17:24:14,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 383525 states and 599963 transitions. [2020-07-21 17:24:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:24:14,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:14,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:15,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:15,174 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash 94415271, now seen corresponding path program 1 times [2020-07-21 17:24:15,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:15,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30634884] [2020-07-21 17:24:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:15,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:24:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:15,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:15,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30634884] [2020-07-21 17:24:15,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:15,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:24:15,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756052020] [2020-07-21 17:24:15,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:24:15,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:24:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:24:15,608 INFO L87 Difference]: Start difference. First operand 383525 states and 599963 transitions. Second operand 5 states. [2020-07-21 17:24:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:36,012 INFO L93 Difference]: Finished difference Result 767018 states and 1202186 transitions. [2020-07-21 17:24:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:24:36,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:24:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:38,380 INFO L225 Difference]: With dead ends: 767018 [2020-07-21 17:24:38,380 INFO L226 Difference]: Without dead ends: 383525 [2020-07-21 17:24:40,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:24:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383525 states. [2020-07-21 17:25:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383525 to 383525. [2020-07-21 17:25:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383525 states. [2020-07-21 17:25:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383525 states to 383525 states and 597659 transitions. [2020-07-21 17:25:16,477 INFO L78 Accepts]: Start accepts. Automaton has 383525 states and 597659 transitions. Word has length 255 [2020-07-21 17:25:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:16,477 INFO L479 AbstractCegarLoop]: Abstraction has 383525 states and 597659 transitions. [2020-07-21 17:25:16,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:25:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 383525 states and 597659 transitions. [2020-07-21 17:25:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:25:16,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:16,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:16,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:16,690 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1147527449, now seen corresponding path program 1 times [2020-07-21 17:25:16,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:16,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206193437] [2020-07-21 17:25:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:17,016 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:17,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:25:17,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:17,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:17,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206193437] [2020-07-21 17:25:17,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:17,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:25:17,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839059867] [2020-07-21 17:25:17,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:25:17,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:17,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:25:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:17,090 INFO L87 Difference]: Start difference. First operand 383525 states and 597659 transitions. Second operand 5 states. [2020-07-21 17:25:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:51,687 INFO L93 Difference]: Finished difference Result 857067 states and 1477748 transitions. [2020-07-21 17:25:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:25:51,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:25:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:53,702 INFO L225 Difference]: With dead ends: 857067 [2020-07-21 17:25:53,702 INFO L226 Difference]: Without dead ends: 473574 [2020-07-21 17:26:11,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:26:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473574 states. [2020-07-21 17:26:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473574 to 447333. [2020-07-21 17:26:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447333 states. [2020-07-21 17:26:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447333 states to 447333 states and 672219 transitions. [2020-07-21 17:26:39,475 INFO L78 Accepts]: Start accepts. Automaton has 447333 states and 672219 transitions. Word has length 255 [2020-07-21 17:26:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:39,475 INFO L479 AbstractCegarLoop]: Abstraction has 447333 states and 672219 transitions. [2020-07-21 17:26:39,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:26:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 447333 states and 672219 transitions. [2020-07-21 17:26:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:26:39,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:39,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:39,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:39,678 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:39,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1292685735, now seen corresponding path program 1 times [2020-07-21 17:26:39,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:39,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899867364] [2020-07-21 17:26:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:41,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:26:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:41,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:41,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899867364] [2020-07-21 17:26:41,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:41,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:26:41,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904469247] [2020-07-21 17:26:41,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:26:41,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:26:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:41,496 INFO L87 Difference]: Start difference. First operand 447333 states and 672219 transitions. Second operand 5 states. [2020-07-21 17:27:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:09,290 INFO L93 Difference]: Finished difference Result 894634 states and 1346698 transitions. [2020-07-21 17:27:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:27:09,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:27:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:12,067 INFO L225 Difference]: With dead ends: 894634 [2020-07-21 17:27:12,067 INFO L226 Difference]: Without dead ends: 447333 [2020-07-21 17:27:14,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:27:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447333 states. [2020-07-21 17:27:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447333 to 447333. [2020-07-21 17:27:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447333 states. [2020-07-21 17:27:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447333 states to 447333 states and 669915 transitions. [2020-07-21 17:27:49,314 INFO L78 Accepts]: Start accepts. Automaton has 447333 states and 669915 transitions. Word has length 255 [2020-07-21 17:27:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:49,314 INFO L479 AbstractCegarLoop]: Abstraction has 447333 states and 669915 transitions. [2020-07-21 17:27:49,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:27:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 447333 states and 669915 transitions. [2020-07-21 17:27:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:27:49,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:49,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:49,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:49,517 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1050503449, now seen corresponding path program 1 times [2020-07-21 17:27:49,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:49,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311720815] [2020-07-21 17:27:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 17:27:49,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:27:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:01,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:01,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311720815] [2020-07-21 17:28:01,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:01,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:28:01,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68657188] [2020-07-21 17:28:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:28:01,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:28:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:01,312 INFO L87 Difference]: Start difference. First operand 447333 states and 669915 transitions. Second operand 5 states. [2020-07-21 17:28:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:21,169 INFO L93 Difference]: Finished difference Result 894634 states and 1342090 transitions. [2020-07-21 17:28:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:28:21,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:28:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:22,883 INFO L225 Difference]: With dead ends: 894634 [2020-07-21 17:28:22,883 INFO L226 Difference]: Without dead ends: 447333 [2020-07-21 17:28:25,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:28:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447333 states. [2020-07-21 17:28:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447333 to 447333. [2020-07-21 17:28:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447333 states. [2020-07-21 17:29:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447333 states to 447333 states and 667611 transitions. [2020-07-21 17:29:00,945 INFO L78 Accepts]: Start accepts. Automaton has 447333 states and 667611 transitions. Word has length 255 [2020-07-21 17:29:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:00,946 INFO L479 AbstractCegarLoop]: Abstraction has 447333 states and 667611 transitions. [2020-07-21 17:29:00,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:29:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 447333 states and 667611 transitions. [2020-07-21 17:29:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:29:00,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:00,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (22)] Forcibly destroying the process [2020-07-21 17:29:02,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:02,056 INFO L427 AbstractCegarLoop]: === Iteration 22 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1264637529, now seen corresponding path program 1 times [2020-07-21 17:29:02,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:02,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969805305] [2020-07-21 17:29:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 17:29:02,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:29:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:02,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:02,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969805305] [2020-07-21 17:29:02,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:02,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:29:02,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894721164] [2020-07-21 17:29:02,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:29:02,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:29:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:02,442 INFO L87 Difference]: Start difference. First operand 447333 states and 667611 transitions. Second operand 5 states. [2020-07-21 17:29:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:34,403 INFO L93 Difference]: Finished difference Result 894634 states and 1337482 transitions. [2020-07-21 17:29:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:29:34,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:29:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:37,395 INFO L225 Difference]: With dead ends: 894634 [2020-07-21 17:29:37,395 INFO L226 Difference]: Without dead ends: 447333 [2020-07-21 17:29:38,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:29:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447333 states. [2020-07-21 17:30:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447333 to 447333. [2020-07-21 17:30:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447333 states. [2020-07-21 17:30:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447333 states to 447333 states and 665307 transitions. [2020-07-21 17:30:19,357 INFO L78 Accepts]: Start accepts. Automaton has 447333 states and 665307 transitions. Word has length 255 [2020-07-21 17:30:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:19,358 INFO L479 AbstractCegarLoop]: Abstraction has 447333 states and 665307 transitions. [2020-07-21 17:30:19,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:30:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 447333 states and 665307 transitions. [2020-07-21 17:30:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 17:30:19,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:19,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:19,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:19,567 INFO L427 AbstractCegarLoop]: === Iteration 23 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1238735975, now seen corresponding path program 1 times [2020-07-21 17:30:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:19,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435473123] [2020-07-21 17:30:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 17:30:19,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:30:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:19,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:19,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435473123] [2020-07-21 17:30:19,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:19,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:30:19,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739370781] [2020-07-21 17:30:19,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:30:19,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:19,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:30:19,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:30:19,961 INFO L87 Difference]: Start difference. First operand 447333 states and 665307 transitions. Second operand 5 states. [2020-07-21 17:31:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:04,799 INFO L93 Difference]: Finished difference Result 984683 states and 1613748 transitions. [2020-07-21 17:31:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:31:04,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 17:31:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:08,558 INFO L225 Difference]: With dead ends: 984683 [2020-07-21 17:31:08,558 INFO L226 Difference]: Without dead ends: 537382 [2020-07-21 17:31:30,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:31:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537382 states. [2020-07-21 17:31:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537382 to 511141. [2020-07-21 17:31:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511141 states.