/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:16:10,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:16:10,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:16:10,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:16:10,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:16:10,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:16:10,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:16:10,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:16:10,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:16:10,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:16:10,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:16:10,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:16:10,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:16:10,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:16:10,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:16:10,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:16:10,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:16:10,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:16:10,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:16:10,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:16:10,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:16:10,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:16:10,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:16:10,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:16:10,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:16:10,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:16:10,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:16:10,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:16:10,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:16:10,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:16:10,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:16:10,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:16:10,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:16:10,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:16:10,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:16:10,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:16:10,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:16:10,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:16:10,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:16:10,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:16:10,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:16:10,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:16:10,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:16:10,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:16:10,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:16:10,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:16:10,903 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:16:10,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:16:10,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:16:10,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:16:10,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:16:10,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:16:10,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:16:10,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:16:10,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:16:10,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:16:10,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:16:10,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:16:10,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:16:10,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:16:10,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:16:10,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:16:10,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:16:10,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:10,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:16:10,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:16:10,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:16:11,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:16:11,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:16:11,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:16:11,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:16:11,222 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:16:11,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 12:16:11,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19974148f/42a2e2288ff344209dca31f4e66befb7/FLAG5b00f6bbe [2020-07-21 12:16:11,811 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:16:11,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-21 12:16:11,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19974148f/42a2e2288ff344209dca31f4e66befb7/FLAG5b00f6bbe [2020-07-21 12:16:12,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19974148f/42a2e2288ff344209dca31f4e66befb7 [2020-07-21 12:16:12,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:16:12,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:16:12,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:16:12,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:16:12,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:16:12,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2846fb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12, skipping insertion in model container [2020-07-21 12:16:12,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:16:12,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:16:12,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:16:12,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:16:12,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:16:12,864 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:16:12,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12 WrapperNode [2020-07-21 12:16:12,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:16:12,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:16:12,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:16:12,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:16:12,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... [2020-07-21 12:16:12,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:16:12,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:16:12,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:16:12,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:16:12,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:16:13,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:16:13,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:16:13,073 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 12:16:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 12:16:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 12:16:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 12:16:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 12:16:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 12:16:13,075 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 12:16:13,075 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 12:16:13,075 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 12:16:13,076 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 12:16:13,076 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 12:16:13,077 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 12:16:13,077 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 12:16:13,078 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 12:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 12:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 12:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 12:16:13,079 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 12:16:13,080 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 12:16:13,080 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 12:16:13,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-21 12:16:13,082 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 12:16:13,082 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 12:16:13,082 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 12:16:13,082 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 12:16:13,083 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 12:16:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 12:16:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 12:16:13,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:16:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:16:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:16:13,084 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 12:16:13,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 12:16:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 12:16:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 12:16:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 12:16:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 12:16:13,086 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 12:16:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 12:16:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 12:16:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-21 12:16:13,087 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 12:16:13,088 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 12:16:13,089 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 12:16:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 12:16:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 12:16:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 12:16:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 12:16:13,090 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 12:16:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 12:16:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 12:16:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-21 12:16:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 12:16:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 12:16:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 12:16:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 12:16:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 12:16:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 12:16:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 12:16:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:16:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:16:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:16:14,406 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:16:14,407 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 12:16:14,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:16:14 BoogieIcfgContainer [2020-07-21 12:16:14,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:16:14,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:16:14,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:16:14,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:16:14,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:16:12" (1/3) ... [2020-07-21 12:16:14,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef606c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:16:14, skipping insertion in model container [2020-07-21 12:16:14,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:16:12" (2/3) ... [2020-07-21 12:16:14,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef606c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:16:14, skipping insertion in model container [2020-07-21 12:16:14,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:16:14" (3/3) ... [2020-07-21 12:16:14,424 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-21 12:16:14,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:16:14,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:16:14,458 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:16:14,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:16:14,488 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:16:14,488 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:16:14,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:16:14,489 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:16:14,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:16:14,490 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:16:14,490 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:16:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-21 12:16:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 12:16:14,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:14,550 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 12:16:14,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-21 12:16:14,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:14,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658997931] [2020-07-21 12:16:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:15,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:15,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658997931] [2020-07-21 12:16:15,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:15,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:15,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277694555] [2020-07-21 12:16:15,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:15,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:15,300 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-21 12:16:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:15,421 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-21 12:16:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:15,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 12:16:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:15,452 INFO L225 Difference]: With dead ends: 1034 [2020-07-21 12:16:15,452 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 12:16:15,469 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 12:16:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 12:16:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 12:16:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 12:16:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-21 12:16:15,646 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-21 12:16:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:15,652 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-21 12:16:15,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-21 12:16:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 12:16:15,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:15,667 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] [2020-07-21 12:16:15,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:15,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-21 12:16:15,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:15,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298498401] [2020-07-21 12:16:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:16,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2233 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:16,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:16,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298498401] [2020-07-21 12:16:16,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:16,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:16,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663251721] [2020-07-21 12:16:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:16,426 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-21 12:16:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:16,515 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-21 12:16:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:16,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 12:16:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:16,523 INFO L225 Difference]: With dead ends: 1010 [2020-07-21 12:16:16,523 INFO L226 Difference]: Without dead ends: 517 [2020-07-21 12:16:16,526 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 12:16:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-21 12:16:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-21 12:16:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-21 12:16:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-21 12:16:16,568 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-21 12:16:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:16,570 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-21 12:16:16,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-21 12:16:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-21 12:16:16,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:16,578 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 12:16:16,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:16,794 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-21 12:16:16,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:16,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267167444] [2020-07-21 12:16:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:17,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:17,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267167444] [2020-07-21 12:16:17,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:17,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:17,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669707421] [2020-07-21 12:16:17,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:17,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:17,263 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-21 12:16:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:17,351 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-21 12:16:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:17,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-21 12:16:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:17,360 INFO L225 Difference]: With dead ends: 1479 [2020-07-21 12:16:17,361 INFO L226 Difference]: Without dead ends: 996 [2020-07-21 12:16:17,363 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 12:16:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-21 12:16:17,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-21 12:16:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-21 12:16:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-21 12:16:17,421 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-21 12:16:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:17,422 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-21 12:16:17,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-21 12:16:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:17,430 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 12:16:17,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:17,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-21 12:16:17,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:17,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889973256] [2020-07-21 12:16:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:18,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:18,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889973256] [2020-07-21 12:16:18,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:18,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:18,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351334028] [2020-07-21 12:16:18,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:18,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:18,102 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 3 states. [2020-07-21 12:16:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:18,218 INFO L93 Difference]: Finished difference Result 2854 states and 4374 transitions. [2020-07-21 12:16:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:18,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:18,243 INFO L225 Difference]: With dead ends: 2854 [2020-07-21 12:16:18,244 INFO L226 Difference]: Without dead ends: 1915 [2020-07-21 12:16:18,252 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 12:16:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-07-21 12:16:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1908. [2020-07-21 12:16:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-07-21 12:16:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2868 transitions. [2020-07-21 12:16:18,377 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2868 transitions. Word has length 255 [2020-07-21 12:16:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:18,378 INFO L479 AbstractCegarLoop]: Abstraction has 1908 states and 2868 transitions. [2020-07-21 12:16:18,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2868 transitions. [2020-07-21 12:16:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:18,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:18,384 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 12:16:18,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:18,598 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:18,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1424231433, now seen corresponding path program 1 times [2020-07-21 12:16:18,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:18,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712440528] [2020-07-21 12:16:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:19,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712440528] [2020-07-21 12:16:19,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:19,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:19,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704699836] [2020-07-21 12:16:19,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:19,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:19,086 INFO L87 Difference]: Start difference. First operand 1908 states and 2868 transitions. Second operand 3 states. [2020-07-21 12:16:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:19,250 INFO L93 Difference]: Finished difference Result 5612 states and 8630 transitions. [2020-07-21 12:16:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:19,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:19,274 INFO L225 Difference]: With dead ends: 5612 [2020-07-21 12:16:19,274 INFO L226 Difference]: Without dead ends: 3755 [2020-07-21 12:16:19,285 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 12:16:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2020-07-21 12:16:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3746. [2020-07-21 12:16:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3746 states. [2020-07-21 12:16:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 5635 transitions. [2020-07-21 12:16:19,464 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 5635 transitions. Word has length 255 [2020-07-21 12:16:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:19,464 INFO L479 AbstractCegarLoop]: Abstraction has 3746 states and 5635 transitions. [2020-07-21 12:16:19,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 5635 transitions. [2020-07-21 12:16:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:19,471 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, 1] [2020-07-21 12:16:19,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:19,685 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1615137816, now seen corresponding path program 1 times [2020-07-21 12:16:19,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:19,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520209832] [2020-07-21 12:16:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:20,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:20,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520209832] [2020-07-21 12:16:20,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:20,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:20,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653182997] [2020-07-21 12:16:20,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:20,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:20,124 INFO L87 Difference]: Start difference. First operand 3746 states and 5635 transitions. Second operand 3 states. [2020-07-21 12:16:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:20,410 INFO L93 Difference]: Finished difference Result 11086 states and 17062 transitions. [2020-07-21 12:16:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:20,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:20,472 INFO L225 Difference]: With dead ends: 11086 [2020-07-21 12:16:20,473 INFO L226 Difference]: Without dead ends: 7391 [2020-07-21 12:16:20,503 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 12:16:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2020-07-21 12:16:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 7372. [2020-07-21 12:16:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7372 states. [2020-07-21 12:16:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 11119 transitions. [2020-07-21 12:16:21,072 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 11119 transitions. Word has length 255 [2020-07-21 12:16:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:21,073 INFO L479 AbstractCegarLoop]: Abstraction has 7372 states and 11119 transitions. [2020-07-21 12:16:21,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 11119 transitions. [2020-07-21 12:16:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:21,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:21,078 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 12:16:21,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:21,292 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -102323093, now seen corresponding path program 1 times [2020-07-21 12:16:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:21,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250969960] [2020-07-21 12:16:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:16:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:21,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:21,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250969960] [2020-07-21 12:16:21,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:21,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:21,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297018127] [2020-07-21 12:16:21,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:21,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:21,702 INFO L87 Difference]: Start difference. First operand 7372 states and 11119 transitions. Second operand 3 states. [2020-07-21 12:16:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:21,913 INFO L93 Difference]: Finished difference Result 13472 states and 20082 transitions. [2020-07-21 12:16:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:21,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:22,057 INFO L225 Difference]: With dead ends: 13472 [2020-07-21 12:16:22,059 INFO L226 Difference]: Without dead ends: 6133 [2020-07-21 12:16:22,088 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 12:16:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2020-07-21 12:16:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 6133. [2020-07-21 12:16:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6133 states. [2020-07-21 12:16:22,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9011 transitions. [2020-07-21 12:16:22,376 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9011 transitions. Word has length 255 [2020-07-21 12:16:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:22,377 INFO L479 AbstractCegarLoop]: Abstraction has 6133 states and 9011 transitions. [2020-07-21 12:16:22,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9011 transitions. [2020-07-21 12:16:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:22,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:22,381 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 12:16:22,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:22,595 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -454979607, now seen corresponding path program 1 times [2020-07-21 12:16:22,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:22,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115080130] [2020-07-21 12:16:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:22,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:22,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115080130] [2020-07-21 12:16:22,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:22,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:22,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234050220] [2020-07-21 12:16:22,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:22,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:22,977 INFO L87 Difference]: Start difference. First operand 6133 states and 9011 transitions. Second operand 3 states. [2020-07-21 12:16:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:23,497 INFO L93 Difference]: Finished difference Result 18256 states and 27394 transitions. [2020-07-21 12:16:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:23,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:23,574 INFO L225 Difference]: With dead ends: 18256 [2020-07-21 12:16:23,575 INFO L226 Difference]: Without dead ends: 12156 [2020-07-21 12:16:23,611 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 12:16:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2020-07-21 12:16:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 12129. [2020-07-21 12:16:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12129 states. [2020-07-21 12:16:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12129 states to 12129 states and 17881 transitions. [2020-07-21 12:16:24,082 INFO L78 Accepts]: Start accepts. Automaton has 12129 states and 17881 transitions. Word has length 255 [2020-07-21 12:16:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:24,083 INFO L479 AbstractCegarLoop]: Abstraction has 12129 states and 17881 transitions. [2020-07-21 12:16:24,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12129 states and 17881 transitions. [2020-07-21 12:16:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:24,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:24,087 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 12:16:24,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:24,301 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash -167519702, now seen corresponding path program 1 times [2020-07-21 12:16:24,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:24,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220570191] [2020-07-21 12:16:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:25,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:25,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220570191] [2020-07-21 12:16:25,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:25,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:25,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789444106] [2020-07-21 12:16:25,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:25,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:25,259 INFO L87 Difference]: Start difference. First operand 12129 states and 17881 transitions. Second operand 3 states. [2020-07-21 12:16:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:25,820 INFO L93 Difference]: Finished difference Result 36240 states and 54724 transitions. [2020-07-21 12:16:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:25,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:25,946 INFO L225 Difference]: With dead ends: 36240 [2020-07-21 12:16:25,946 INFO L226 Difference]: Without dead ends: 24144 [2020-07-21 12:16:26,003 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 12:16:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24144 states. [2020-07-21 12:16:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24144 to 24093. [2020-07-21 12:16:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24093 states. [2020-07-21 12:16:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24093 states to 24093 states and 35707 transitions. [2020-07-21 12:16:27,128 INFO L78 Accepts]: Start accepts. Automaton has 24093 states and 35707 transitions. Word has length 255 [2020-07-21 12:16:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:27,128 INFO L479 AbstractCegarLoop]: Abstraction has 24093 states and 35707 transitions. [2020-07-21 12:16:27,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24093 states and 35707 transitions. [2020-07-21 12:16:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:27,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:27,133 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 12:16:27,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:27,348 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash 970109163, now seen corresponding path program 1 times [2020-07-21 12:16:27,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:27,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661310653] [2020-07-21 12:16:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:27,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:27,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661310653] [2020-07-21 12:16:27,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:27,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:27,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827610058] [2020-07-21 12:16:27,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:27,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:27,712 INFO L87 Difference]: Start difference. First operand 24093 states and 35707 transitions. Second operand 3 states. [2020-07-21 12:16:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:28,649 INFO L93 Difference]: Finished difference Result 71908 states and 109422 transitions. [2020-07-21 12:16:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:28,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:28,837 INFO L225 Difference]: With dead ends: 71908 [2020-07-21 12:16:28,837 INFO L226 Difference]: Without dead ends: 47848 [2020-07-21 12:16:28,949 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 12:16:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47848 states. [2020-07-21 12:16:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47848 to 47749. [2020-07-21 12:16:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47749 states. [2020-07-21 12:16:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47749 states to 47749 states and 71321 transitions. [2020-07-21 12:16:32,262 INFO L78 Accepts]: Start accepts. Automaton has 47749 states and 71321 transitions. Word has length 255 [2020-07-21 12:16:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:32,263 INFO L479 AbstractCegarLoop]: Abstraction has 47749 states and 71321 transitions. [2020-07-21 12:16:32,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47749 states and 71321 transitions. [2020-07-21 12:16:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:32,265 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 12:16:32,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:32,480 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1325705610, now seen corresponding path program 1 times [2020-07-21 12:16:32,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:32,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119194313] [2020-07-21 12:16:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:32,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:32,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119194313] [2020-07-21 12:16:32,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:32,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:32,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376664966] [2020-07-21 12:16:32,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:32,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:32,881 INFO L87 Difference]: Start difference. First operand 47749 states and 71321 transitions. Second operand 3 states. [2020-07-21 12:16:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:34,646 INFO L93 Difference]: Finished difference Result 142572 states and 219668 transitions. [2020-07-21 12:16:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:34,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:35,027 INFO L225 Difference]: With dead ends: 142572 [2020-07-21 12:16:35,028 INFO L226 Difference]: Without dead ends: 94856 [2020-07-21 12:16:37,198 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 12:16:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94856 states. [2020-07-21 12:16:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94856 to 94661. [2020-07-21 12:16:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94661 states. [2020-07-21 12:16:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94661 states to 94661 states and 143075 transitions. [2020-07-21 12:16:39,558 INFO L78 Accepts]: Start accepts. Automaton has 94661 states and 143075 transitions. Word has length 255 [2020-07-21 12:16:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:39,559 INFO L479 AbstractCegarLoop]: Abstraction has 94661 states and 143075 transitions. [2020-07-21 12:16:39,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 94661 states and 143075 transitions. [2020-07-21 12:16:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:39,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:39,561 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 12:16:39,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:39,761 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 48552937, now seen corresponding path program 1 times [2020-07-21 12:16:39,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:39,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009002997] [2020-07-21 12:16:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:40,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:40,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:40,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009002997] [2020-07-21 12:16:40,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:40,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:40,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080698729] [2020-07-21 12:16:40,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:40,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:40,163 INFO L87 Difference]: Start difference. First operand 94661 states and 143075 transitions. Second operand 3 states. [2020-07-21 12:16:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:46,251 INFO L93 Difference]: Finished difference Result 282700 states and 443878 transitions. [2020-07-21 12:16:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:16:46,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:16:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:46,927 INFO L225 Difference]: With dead ends: 282700 [2020-07-21 12:16:46,927 INFO L226 Difference]: Without dead ends: 188072 [2020-07-21 12:16:47,281 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 12:16:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188072 states. [2020-07-21 12:16:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188072 to 187685. [2020-07-21 12:16:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187685 states. [2020-07-21 12:16:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187685 states to 187685 states and 288769 transitions. [2020-07-21 12:16:55,630 INFO L78 Accepts]: Start accepts. Automaton has 187685 states and 288769 transitions. Word has length 255 [2020-07-21 12:16:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:55,631 INFO L479 AbstractCegarLoop]: Abstraction has 187685 states and 288769 transitions. [2020-07-21 12:16:55,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:16:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 187685 states and 288769 transitions. [2020-07-21 12:16:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:16:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:55,633 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 12:16:55,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:55,847 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2000899464, now seen corresponding path program 1 times [2020-07-21 12:16:55,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:55,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688411619] [2020-07-21 12:16:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:16:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:16:59,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:16:59,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688411619] [2020-07-21 12:16:59,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:16:59,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:16:59,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794656466] [2020-07-21 12:16:59,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:16:59,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:16:59,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:16:59,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:16:59,924 INFO L87 Difference]: Start difference. First operand 187685 states and 288769 transitions. Second operand 3 states. [2020-07-21 12:17:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:08,132 INFO L93 Difference]: Finished difference Result 561708 states and 908092 transitions. [2020-07-21 12:17:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:08,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-21 12:17:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:09,398 INFO L225 Difference]: With dead ends: 561708 [2020-07-21 12:17:09,399 INFO L226 Difference]: Without dead ends: 374056 [2020-07-21 12:17:10,311 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 12:17:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374056 states. [2020-07-21 12:17:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374056 to 373285. [2020-07-21 12:17:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-21 12:17:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 589723 transitions. [2020-07-21 12:17:39,355 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 589723 transitions. Word has length 255 [2020-07-21 12:17:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:39,356 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 589723 transitions. [2020-07-21 12:17:39,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 589723 transitions. [2020-07-21 12:17:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:17:39,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:39,358 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 12:17:39,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:39,564 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 94415271, now seen corresponding path program 1 times [2020-07-21 12:17:39,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:39,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806350913] [2020-07-21 12:17:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:17:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:39,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:39,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806350913] [2020-07-21 12:17:39,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:39,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:17:39,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928054060] [2020-07-21 12:17:39,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:17:39,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:17:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:17:39,967 INFO L87 Difference]: Start difference. First operand 373285 states and 589723 transitions. Second operand 5 states. [2020-07-21 12:17:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:59,468 INFO L93 Difference]: Finished difference Result 746538 states and 1181706 transitions. [2020-07-21 12:17:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:17:59,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 12:17:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:02,276 INFO L225 Difference]: With dead ends: 746538 [2020-07-21 12:18:02,276 INFO L226 Difference]: Without dead ends: 373285 [2020-07-21 12:18:04,999 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 12:18:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373285 states. [2020-07-21 12:18:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373285 to 373285. [2020-07-21 12:18:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373285 states. [2020-07-21 12:18:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373285 states to 373285 states and 587419 transitions. [2020-07-21 12:18:35,395 INFO L78 Accepts]: Start accepts. Automaton has 373285 states and 587419 transitions. Word has length 255 [2020-07-21 12:18:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:35,396 INFO L479 AbstractCegarLoop]: Abstraction has 373285 states and 587419 transitions. [2020-07-21 12:18:35,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:18:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 373285 states and 587419 transitions. [2020-07-21 12:18:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:18:35,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:35,398 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 12:18:35,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:35,598 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1147527449, now seen corresponding path program 1 times [2020-07-21 12:18:35,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:35,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652828064] [2020-07-21 12:18:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:18:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:36,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:36,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652828064] [2020-07-21 12:18:36,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:36,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:18:36,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101265866] [2020-07-21 12:18:36,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:18:36,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:36,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:18:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:36,002 INFO L87 Difference]: Start difference. First operand 373285 states and 587419 transitions. Second operand 5 states. [2020-07-21 12:19:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:08,409 INFO L93 Difference]: Finished difference Result 832747 states and 1453428 transitions. [2020-07-21 12:19:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:19:08,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 12:19:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:11,965 INFO L225 Difference]: With dead ends: 832747 [2020-07-21 12:19:11,965 INFO L226 Difference]: Without dead ends: 459494 [2020-07-21 12:19:28,204 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 12:19:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459494 states. [2020-07-21 12:20:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459494 to 433253. [2020-07-21 12:20:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 12:20:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 658139 transitions. [2020-07-21 12:20:05,896 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 658139 transitions. Word has length 255 [2020-07-21 12:20:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:05,897 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 658139 transitions. [2020-07-21 12:20:05,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:20:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 658139 transitions. [2020-07-21 12:20:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:20:05,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:05,899 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 12:20:06,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:06,104 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1292685735, now seen corresponding path program 1 times [2020-07-21 12:20:06,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:06,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273338196] [2020-07-21 12:20:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:20:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:20:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:07,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:07,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273338196] [2020-07-21 12:20:07,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:07,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:20:07,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922881735] [2020-07-21 12:20:07,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:20:07,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:07,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:20:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:20:07,360 INFO L87 Difference]: Start difference. First operand 433253 states and 658139 transitions. Second operand 5 states. [2020-07-21 12:20:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:36,350 INFO L93 Difference]: Finished difference Result 866474 states and 1318538 transitions. [2020-07-21 12:20:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:20:36,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 12:20:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:37,806 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 12:20:37,806 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 12:20:40,196 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 12:20:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-21 12:21:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-21 12:21:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 12:21:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 655835 transitions. [2020-07-21 12:21:16,024 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 655835 transitions. Word has length 255 [2020-07-21 12:21:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:16,025 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 655835 transitions. [2020-07-21 12:21:16,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:21:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 655835 transitions. [2020-07-21 12:21:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:21:16,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:16,027 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 12:21:16,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:16,242 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1050503449, now seen corresponding path program 1 times [2020-07-21 12:21:16,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:16,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944092289] [2020-07-21 12:21:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:21:16,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:16,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:16,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944092289] [2020-07-21 12:21:16,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:16,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:21:16,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849895868] [2020-07-21 12:21:16,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:21:16,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:21:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:21:16,644 INFO L87 Difference]: Start difference. First operand 433253 states and 655835 transitions. Second operand 5 states. [2020-07-21 12:21:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:44,978 INFO L93 Difference]: Finished difference Result 866474 states and 1313930 transitions. [2020-07-21 12:21:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:21:44,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 12:21:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:46,530 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 12:21:46,531 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 12:21:49,468 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 12:21:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states. [2020-07-21 12:22:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433253 to 433253. [2020-07-21 12:22:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433253 states. [2020-07-21 12:22:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433253 states to 433253 states and 653531 transitions. [2020-07-21 12:22:36,147 INFO L78 Accepts]: Start accepts. Automaton has 433253 states and 653531 transitions. Word has length 255 [2020-07-21 12:22:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:36,148 INFO L479 AbstractCegarLoop]: Abstraction has 433253 states and 653531 transitions. [2020-07-21 12:22:36,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:22:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 433253 states and 653531 transitions. [2020-07-21 12:22:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-21 12:22:36,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:36,150 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 12:22:36,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:36,351 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1264637529, now seen corresponding path program 1 times [2020-07-21 12:22:36,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:36,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801053735] [2020-07-21 12:22:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:36,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:22:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:36,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:36,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801053735] [2020-07-21 12:22:36,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:36,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:22:36,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333901612] [2020-07-21 12:22:36,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:22:36,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:22:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:36,738 INFO L87 Difference]: Start difference. First operand 433253 states and 653531 transitions. Second operand 5 states. [2020-07-21 12:23:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:01,121 INFO L93 Difference]: Finished difference Result 866474 states and 1309322 transitions. [2020-07-21 12:23:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:23:01,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-21 12:23:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:02,615 INFO L225 Difference]: With dead ends: 866474 [2020-07-21 12:23:02,615 INFO L226 Difference]: Without dead ends: 433253 [2020-07-21 12:23:05,447 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 12:23:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433253 states.