/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:58:07,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:58:07,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:58:07,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:58:07,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:58:07,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:58:07,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:58:07,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:58:07,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:58:07,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:58:07,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:58:07,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:58:07,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:58:07,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:58:07,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:58:07,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:58:07,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:58:07,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:58:07,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:58:07,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:58:07,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:58:07,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:58:07,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:58:07,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:58:07,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:58:07,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:58:07,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:58:07,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:58:07,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:58:07,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:58:07,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:58:07,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:58:07,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:58:07,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:58:07,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:58:07,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:58:07,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:58:07,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:58:07,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:58:07,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:58:07,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:58:07,773 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 20:58:07,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:58:07,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:58:07,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:58:07,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:58:07,789 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:58:07,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:58:07,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:58:07,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:58:07,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:58:07,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:58:07,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:58:07,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:58:07,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:58:07,791 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:58:07,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:58:07,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:58:07,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:58:07,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:58:07,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:58:07,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:58:07,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:58:07,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:58:07,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:58:07,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:58:07,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:58:07,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:58:07,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:07,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:58:07,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:58:07,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:58:08,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:58:08,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:58:08,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:58:08,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:58:08,102 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:58:08,103 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 20:58:08,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930dc4007/69c959f08c52489a9692edb90276b265/FLAGf377f7283 [2020-07-21 20:58:08,753 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:58:08,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-21 20:58:08,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930dc4007/69c959f08c52489a9692edb90276b265/FLAGf377f7283 [2020-07-21 20:58:09,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930dc4007/69c959f08c52489a9692edb90276b265 [2020-07-21 20:58:09,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:58:09,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:58:09,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:58:09,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:58:09,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:58:09,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f19b831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09, skipping insertion in model container [2020-07-21 20:58:09,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:58:09,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:58:09,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:58:09,620 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:58:09,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:58:09,764 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:58:09,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09 WrapperNode [2020-07-21 20:58:09,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:58:09,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:58:09,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:58:09,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:58:09,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... [2020-07-21 20:58:09,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:58:09,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:58:09,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:58:09,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:58:09,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:58:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:58:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:58:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-21 20:58:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-21 20:58:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-21 20:58:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-21 20:58:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-21 20:58:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-21 20:58:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-21 20:58:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-21 20:58:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-21 20:58:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-21 20:58:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-21 20:58:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-21 20:58:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-21 20:58:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-21 20:58:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-21 20:58:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-21 20:58:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-21 20:58:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-21 20:58:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-21 20:58:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-21 20:58:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-21 20:58:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-21 20:58:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-21 20:58:09,961 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-21 20:58:09,961 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-21 20:58:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-21 20:58:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-21 20:58:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-21 20:58:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-21 20:58:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-21 20:58:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-21 20:58:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-21 20:58:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:58:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:58:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:58:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-21 20:58:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-21 20:58:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-21 20:58:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-21 20:58:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-21 20:58:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-21 20:58:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-21 20:58:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-21 20:58:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-21 20:58:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-21 20:58:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-21 20:58:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-21 20:58:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-21 20:58:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-21 20:58:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-21 20:58:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-21 20:58:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-21 20:58:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-21 20:58:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-21 20:58:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-21 20:58:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-21 20:58:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-21 20:58:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-21 20:58:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-21 20:58:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-21 20:58:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-21 20:58:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-21 20:58:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-21 20:58:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-21 20:58:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-21 20:58:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:58:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:58:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:58:11,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:58:11,304 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-21 20:58:11,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:58:11 BoogieIcfgContainer [2020-07-21 20:58:11,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:58:11,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:58:11,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:58:11,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:58:11,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:58:09" (1/3) ... [2020-07-21 20:58:11,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7022c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:58:11, skipping insertion in model container [2020-07-21 20:58:11,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:58:09" (2/3) ... [2020-07-21 20:58:11,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7022c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:58:11, skipping insertion in model container [2020-07-21 20:58:11,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:58:11" (3/3) ... [2020-07-21 20:58:11,321 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-21 20:58:11,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:58:11,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:58:11,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:58:11,385 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:58:11,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:58:11,386 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:58:11,386 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:58:11,386 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:58:11,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:58:11,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:58:11,387 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:58:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-21 20:58:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 20:58:11,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:11,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:11,440 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-21 20:58:11,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:11,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016973355] [2020-07-21 20:58:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:11,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:11,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:11,952 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 20:58:11,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:11,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016973355] [2020-07-21 20:58:11,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:11,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:11,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176212623] [2020-07-21 20:58:11,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:11,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:11,980 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-21 20:58:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:12,090 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-21 20:58:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:12,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 20:58:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:12,113 INFO L225 Difference]: With dead ends: 981 [2020-07-21 20:58:12,114 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 20:58:12,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 20:58:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 20:58:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 20:58:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-21 20:58:12,249 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-21 20:58:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:12,254 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-21 20:58:12,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-21 20:58:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 20:58:12,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:12,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:12,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:12,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-21 20:58:12,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:12,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200218975] [2020-07-21 20:58:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:12,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:12,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:12,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:58:12,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:12,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200218975] [2020-07-21 20:58:12,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:12,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:12,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771646479] [2020-07-21 20:58:12,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:12,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:12,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:12,851 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-21 20:58:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:12,943 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-21 20:58:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:12,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 20:58:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:12,949 INFO L225 Difference]: With dead ends: 957 [2020-07-21 20:58:12,949 INFO L226 Difference]: Without dead ends: 490 [2020-07-21 20:58:12,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-21 20:58:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-21 20:58:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-21 20:58:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-21 20:58:12,990 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-21 20:58:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:12,991 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-21 20:58:12,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-21 20:58:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-21 20:58:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:12,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:13,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:13,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-21 20:58:13,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:13,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574991747] [2020-07-21 20:58:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:13,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:13,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:13,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:58:13,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:58:13,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:13,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574991747] [2020-07-21 20:58:13,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:13,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:13,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678427415] [2020-07-21 20:58:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:13,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:13,486 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-21 20:58:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:13,572 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-21 20:58:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:13,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-21 20:58:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:13,581 INFO L225 Difference]: With dead ends: 1382 [2020-07-21 20:58:13,581 INFO L226 Difference]: Without dead ends: 925 [2020-07-21 20:58:13,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-21 20:58:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-21 20:58:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-21 20:58:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-21 20:58:13,639 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-21 20:58:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:13,640 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-21 20:58:13,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-21 20:58:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:13,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:13,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:13,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:13,848 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-21 20:58:13,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:13,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81607960] [2020-07-21 20:58:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:14,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:58:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:58:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:14,133 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 20:58:14,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:14,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81607960] [2020-07-21 20:58:14,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:14,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:58:14,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690623123] [2020-07-21 20:58:14,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:58:14,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:58:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:58:14,138 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 6 states. [2020-07-21 20:58:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:14,230 INFO L93 Difference]: Finished difference Result 1857 states and 2842 transitions. [2020-07-21 20:58:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:58:14,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2020-07-21 20:58:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:14,237 INFO L225 Difference]: With dead ends: 1857 [2020-07-21 20:58:14,238 INFO L226 Difference]: Without dead ends: 970 [2020-07-21 20:58:14,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:58:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-21 20:58:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2020-07-21 20:58:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-07-21 20:58:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1453 transitions. [2020-07-21 20:58:14,295 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1453 transitions. Word has length 241 [2020-07-21 20:58:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:14,295 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1453 transitions. [2020-07-21 20:58:14,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:58:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1453 transitions. [2020-07-21 20:58:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:14,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:14,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:14,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:14,515 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -120433341, now seen corresponding path program 1 times [2020-07-21 20:58:14,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:14,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865102708] [2020-07-21 20:58:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:15,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:15,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:15,271 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 20:58:15,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:15,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865102708] [2020-07-21 20:58:15,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:15,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:15,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055028692] [2020-07-21 20:58:15,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:15,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:15,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:15,278 INFO L87 Difference]: Start difference. First operand 970 states and 1453 transitions. Second operand 3 states. [2020-07-21 20:58:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:15,447 INFO L93 Difference]: Finished difference Result 2833 states and 4342 transitions. [2020-07-21 20:58:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:15,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:15,474 INFO L225 Difference]: With dead ends: 2833 [2020-07-21 20:58:15,474 INFO L226 Difference]: Without dead ends: 1895 [2020-07-21 20:58:15,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-07-21 20:58:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1888. [2020-07-21 20:58:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1888 states. [2020-07-21 20:58:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2834 transitions. [2020-07-21 20:58:15,640 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2834 transitions. Word has length 241 [2020-07-21 20:58:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:15,641 INFO L479 AbstractCegarLoop]: Abstraction has 1888 states and 2834 transitions. [2020-07-21 20:58:15,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2834 transitions. [2020-07-21 20:58:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:15,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:15,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:15,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:15,862 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1545954850, now seen corresponding path program 1 times [2020-07-21 20:58:15,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:15,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436050513] [2020-07-21 20:58:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:16,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:16,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:16,381 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 20:58:16,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:16,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436050513] [2020-07-21 20:58:16,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:16,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:16,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658906877] [2020-07-21 20:58:16,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:16,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:16,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:16,384 INFO L87 Difference]: Start difference. First operand 1888 states and 2834 transitions. Second operand 3 states. [2020-07-21 20:58:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:16,559 INFO L93 Difference]: Finished difference Result 5575 states and 8566 transitions. [2020-07-21 20:58:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:16,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:16,585 INFO L225 Difference]: With dead ends: 5575 [2020-07-21 20:58:16,585 INFO L226 Difference]: Without dead ends: 3719 [2020-07-21 20:58:16,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2020-07-21 20:58:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3708. [2020-07-21 20:58:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3708 states. [2020-07-21 20:58:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5580 transitions. [2020-07-21 20:58:16,799 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5580 transitions. Word has length 241 [2020-07-21 20:58:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:16,799 INFO L479 AbstractCegarLoop]: Abstraction has 3708 states and 5580 transitions. [2020-07-21 20:58:16,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5580 transitions. [2020-07-21 20:58:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:16,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:16,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:17,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:17,018 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1746386751, now seen corresponding path program 1 times [2020-07-21 20:58:17,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:17,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854363487] [2020-07-21 20:58:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:17,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:17,457 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 20:58:17,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:17,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854363487] [2020-07-21 20:58:17,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:17,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:17,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238690186] [2020-07-21 20:58:17,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:17,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:17,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:17,460 INFO L87 Difference]: Start difference. First operand 3708 states and 5580 transitions. Second operand 3 states. [2020-07-21 20:58:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:17,714 INFO L93 Difference]: Finished difference Result 11011 states and 16976 transitions. [2020-07-21 20:58:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:17,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:17,765 INFO L225 Difference]: With dead ends: 11011 [2020-07-21 20:58:17,766 INFO L226 Difference]: Without dead ends: 7335 [2020-07-21 20:58:17,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2020-07-21 20:58:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 7316. [2020-07-21 20:58:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7316 states. [2020-07-21 20:58:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 11048 transitions. [2020-07-21 20:58:18,279 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 11048 transitions. Word has length 241 [2020-07-21 20:58:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:18,280 INFO L479 AbstractCegarLoop]: Abstraction has 7316 states and 11048 transitions. [2020-07-21 20:58:18,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 11048 transitions. [2020-07-21 20:58:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:18,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:18,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:18,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:18,501 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1473391328, now seen corresponding path program 1 times [2020-07-21 20:58:18,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:18,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914003344] [2020-07-21 20:58:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:18,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:18,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:58:18,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:18,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914003344] [2020-07-21 20:58:18,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:18,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:18,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086578665] [2020-07-21 20:58:18,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:18,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:18,901 INFO L87 Difference]: Start difference. First operand 7316 states and 11048 transitions. Second operand 3 states. [2020-07-21 20:58:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:19,465 INFO L93 Difference]: Finished difference Result 21787 states and 33760 transitions. [2020-07-21 20:58:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:19,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:19,570 INFO L225 Difference]: With dead ends: 21787 [2020-07-21 20:58:19,571 INFO L226 Difference]: Without dead ends: 14503 [2020-07-21 20:58:19,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14503 states. [2020-07-21 20:58:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14503 to 14468. [2020-07-21 20:58:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14468 states. [2020-07-21 20:58:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14468 states to 14468 states and 21960 transitions. [2020-07-21 20:58:20,294 INFO L78 Accepts]: Start accepts. Automaton has 14468 states and 21960 transitions. Word has length 241 [2020-07-21 20:58:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:20,295 INFO L479 AbstractCegarLoop]: Abstraction has 14468 states and 21960 transitions. [2020-07-21 20:58:20,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14468 states and 21960 transitions. [2020-07-21 20:58:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:20,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:20,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:20,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:20,515 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1394273473, now seen corresponding path program 1 times [2020-07-21 20:58:20,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:20,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123904465] [2020-07-21 20:58:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:21,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:21,505 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 20:58:21,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:21,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123904465] [2020-07-21 20:58:21,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:21,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:21,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499440565] [2020-07-21 20:58:21,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:21,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:21,508 INFO L87 Difference]: Start difference. First operand 14468 states and 21960 transitions. Second operand 3 states. [2020-07-21 20:58:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:22,301 INFO L93 Difference]: Finished difference Result 43147 states and 67376 transitions. [2020-07-21 20:58:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:22,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:22,477 INFO L225 Difference]: With dead ends: 43147 [2020-07-21 20:58:22,477 INFO L226 Difference]: Without dead ends: 28711 [2020-07-21 20:58:22,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28711 states. [2020-07-21 20:58:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28711 to 28644. [2020-07-21 20:58:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28644 states. [2020-07-21 20:58:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28644 states to 28644 states and 43808 transitions. [2020-07-21 20:58:23,995 INFO L78 Accepts]: Start accepts. Automaton has 28644 states and 43808 transitions. Word has length 241 [2020-07-21 20:58:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:23,996 INFO L479 AbstractCegarLoop]: Abstraction has 28644 states and 43808 transitions. [2020-07-21 20:58:23,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28644 states and 43808 transitions. [2020-07-21 20:58:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:24,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:24,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:24,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:24,215 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:24,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1683507200, now seen corresponding path program 1 times [2020-07-21 20:58:24,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:24,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435491192] [2020-07-21 20:58:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:58:24,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:24,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:24,649 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 20:58:24,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:24,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435491192] [2020-07-21 20:58:24,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:24,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:24,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144408955] [2020-07-21 20:58:24,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:24,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:24,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:24,652 INFO L87 Difference]: Start difference. First operand 28644 states and 43808 transitions. Second operand 3 states. [2020-07-21 20:58:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:26,464 INFO L93 Difference]: Finished difference Result 85483 states and 135064 transitions. [2020-07-21 20:58:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:26,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:26,761 INFO L225 Difference]: With dead ends: 85483 [2020-07-21 20:58:26,761 INFO L226 Difference]: Without dead ends: 56871 [2020-07-21 20:58:26,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56871 states. [2020-07-21 20:58:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56871 to 56740. [2020-07-21 20:58:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56740 states. [2020-07-21 20:58:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56740 states to 56740 states and 87768 transitions. [2020-07-21 20:58:30,542 INFO L78 Accepts]: Start accepts. Automaton has 56740 states and 87768 transitions. Word has length 241 [2020-07-21 20:58:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:30,542 INFO L479 AbstractCegarLoop]: Abstraction has 56740 states and 87768 transitions. [2020-07-21 20:58:30,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56740 states and 87768 transitions. [2020-07-21 20:58:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:30,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:30,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:30,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:30,757 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash -473965823, now seen corresponding path program 1 times [2020-07-21 20:58:30,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:30,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767819950] [2020-07-21 20:58:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:31,069 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:31,157 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 20:58:31,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:31,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767819950] [2020-07-21 20:58:31,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:31,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:31,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799869993] [2020-07-21 20:58:31,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:31,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:31,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:31,161 INFO L87 Difference]: Start difference. First operand 56740 states and 87768 transitions. Second operand 3 states. [2020-07-21 20:58:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:35,483 INFO L93 Difference]: Finished difference Result 169387 states and 272432 transitions. [2020-07-21 20:58:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:35,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:36,049 INFO L225 Difference]: With dead ends: 169387 [2020-07-21 20:58:36,050 INFO L226 Difference]: Without dead ends: 112679 [2020-07-21 20:58:36,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112679 states. [2020-07-21 20:58:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112679 to 112420. [2020-07-21 20:58:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112420 states. [2020-07-21 20:58:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112420 states to 112420 states and 176864 transitions. [2020-07-21 20:58:42,248 INFO L78 Accepts]: Start accepts. Automaton has 112420 states and 176864 transitions. Word has length 241 [2020-07-21 20:58:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:58:42,249 INFO L479 AbstractCegarLoop]: Abstraction has 112420 states and 176864 transitions. [2020-07-21 20:58:42,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:58:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 112420 states and 176864 transitions. [2020-07-21 20:58:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:58:42,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:58:42,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:58:42,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:42,462 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:58:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:58:42,463 INFO L82 PathProgramCache]: Analyzing trace with hash 103777090, now seen corresponding path program 1 times [2020-07-21 20:58:42,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:58:42,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891154712] [2020-07-21 20:58:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:58:42,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:58:42,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:58:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2086 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:58:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:58:42,856 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 20:58:42,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:58:42,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891154712] [2020-07-21 20:58:42,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:58:42,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:58:42,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762479053] [2020-07-21 20:58:42,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:58:42,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:58:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:58:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:42,860 INFO L87 Difference]: Start difference. First operand 112420 states and 176864 transitions. Second operand 3 states. [2020-07-21 20:58:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:58:50,845 INFO L93 Difference]: Finished difference Result 335659 states and 554392 transitions. [2020-07-21 20:58:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:58:50,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:58:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:58:51,683 INFO L225 Difference]: With dead ends: 335659 [2020-07-21 20:58:51,683 INFO L226 Difference]: Without dead ends: 223271 [2020-07-21 20:58:52,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:58:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223271 states. [2020-07-21 20:59:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223271 to 222756. [2020-07-21 20:59:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222756 states. [2020-07-21 20:59:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222756 states to 222756 states and 359352 transitions. [2020-07-21 20:59:04,133 INFO L78 Accepts]: Start accepts. Automaton has 222756 states and 359352 transitions. Word has length 241 [2020-07-21 20:59:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:59:04,138 INFO L479 AbstractCegarLoop]: Abstraction has 222756 states and 359352 transitions. [2020-07-21 20:59:04,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:59:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 222756 states and 359352 transitions. [2020-07-21 20:59:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 20:59:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:59:04,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:59:04,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:59:04,356 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:59:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:59:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 323484995, now seen corresponding path program 1 times [2020-07-21 20:59:04,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:59:04,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174954193] [2020-07-21 20:59:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:59:04,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:59:04,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:59:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:59:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:59:04,729 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 20:59:04,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:59:04,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174954193] [2020-07-21 20:59:04,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:59:04,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:59:04,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590122229] [2020-07-21 20:59:04,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:59:04,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:59:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:59:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:59:04,732 INFO L87 Difference]: Start difference. First operand 222756 states and 359352 transitions. Second operand 3 states. [2020-07-21 20:59:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:59:20,320 INFO L93 Difference]: Finished difference Result 665131 states and 1142480 transitions. [2020-07-21 20:59:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:59:20,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-21 20:59:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:59:31,117 INFO L225 Difference]: With dead ends: 665131 [2020-07-21 20:59:31,117 INFO L226 Difference]: Without dead ends: 442407 [2020-07-21 20:59:32,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:59:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442407 states. [2020-07-21 20:59:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442407 to 441380. [2020-07-21 20:59:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441380 states. [2020-07-21 21:00:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441380 states to 441380 states and 738752 transitions. [2020-07-21 21:00:07,322 INFO L78 Accepts]: Start accepts. Automaton has 441380 states and 738752 transitions. Word has length 241 [2020-07-21 21:00:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:00:07,322 INFO L479 AbstractCegarLoop]: Abstraction has 441380 states and 738752 transitions. [2020-07-21 21:00:07,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:00:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 441380 states and 738752 transitions. [2020-07-21 21:00:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 21:00:07,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:00:07,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:00:07,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:00:07,532 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:00:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:00:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 895628386, now seen corresponding path program 1 times [2020-07-21 21:00:07,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:00:07,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831086217] [2020-07-21 21:00:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:00:09,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:00:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:00:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:00:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:00:09,521 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 21:00:09,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:00:09,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831086217] [2020-07-21 21:00:09,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:00:09,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:00:09,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598367196] [2020-07-21 21:00:09,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:00:09,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:00:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:00:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:00:09,524 INFO L87 Difference]: Start difference. First operand 441380 states and 738752 transitions. Second operand 5 states. [2020-07-21 21:00:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:00:43,785 INFO L93 Difference]: Finished difference Result 882729 states and 1480533 transitions. [2020-07-21 21:00:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:00:43,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 21:00:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:00:46,264 INFO L225 Difference]: With dead ends: 882729 [2020-07-21 21:00:46,265 INFO L226 Difference]: Without dead ends: 441380 [2020-07-21 21:00:56,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:00:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441380 states. [2020-07-21 21:01:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441380 to 441380. [2020-07-21 21:01:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441380 states. [2020-07-21 21:01:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441380 states to 441380 states and 735680 transitions. [2020-07-21 21:01:18,097 INFO L78 Accepts]: Start accepts. Automaton has 441380 states and 735680 transitions. Word has length 241 [2020-07-21 21:01:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:01:18,098 INFO L479 AbstractCegarLoop]: Abstraction has 441380 states and 735680 transitions. [2020-07-21 21:01:18,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:01:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 441380 states and 735680 transitions. [2020-07-21 21:01:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 21:01:18,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:01:18,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:01:18,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:01:18,300 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:01:18,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:01:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2064232738, now seen corresponding path program 1 times [2020-07-21 21:01:18,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:01:18,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829516674] [2020-07-21 21:01:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:01:30,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:01:30,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:01:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:01:30,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:01:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:01:30,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:01:30,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829516674] [2020-07-21 21:01:30,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:01:30,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:01:30,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347464530] [2020-07-21 21:01:30,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:01:30,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:01:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:01:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:01:30,969 INFO L87 Difference]: Start difference. First operand 441380 states and 735680 transitions. Second operand 5 states. [2020-07-21 21:02:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:21,631 INFO L93 Difference]: Finished difference Result 1003818 states and 1846662 transitions. [2020-07-21 21:02:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:02:21,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-21 21:02:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:24,274 INFO L225 Difference]: With dead ends: 1003818 [2020-07-21 21:02:24,274 INFO L226 Difference]: Without dead ends: 562469 [2020-07-21 21:02:31,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:02:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562469 states. [2020-07-21 21:03:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562469 to 529188. [2020-07-21 21:03:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529188 states. [2020-07-21 21:03:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529188 states to 529188 states and 843712 transitions. [2020-07-21 21:03:23,180 INFO L78 Accepts]: Start accepts. Automaton has 529188 states and 843712 transitions. Word has length 241 [2020-07-21 21:03:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:23,180 INFO L479 AbstractCegarLoop]: Abstraction has 529188 states and 843712 transitions. [2020-07-21 21:03:23,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:03:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 529188 states and 843712 transitions. [2020-07-21 21:03:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-21 21:03:23,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:23,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:23,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:23,383 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash -674483622, now seen corresponding path program 1 times [2020-07-21 21:03:23,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:23,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931075163] [2020-07-21 21:03:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:23,678 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:03:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:23,752 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 21:03:23,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:23,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931075163] [2020-07-21 21:03:23,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:23,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:03:23,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716064359] [2020-07-21 21:03:23,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:03:23,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:03:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:23,755 INFO L87 Difference]: Start difference. First operand 529188 states and 843712 transitions. Second operand 5 states.