java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:44,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:44,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:44,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:44,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:44,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:44,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:44,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:44,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:44,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:44,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:44,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:44,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:44,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:44,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:44,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:44,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:44,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:44,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:44,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:44,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:44,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:44,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:44,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:44,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:31:44,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:44,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:44,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:44,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:44,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:44,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:44,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:44,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:44,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:44,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:44,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:44,882 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 [2019-10-15 03:31:44,916 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:44,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:44,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:44,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:44,918 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:44,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:44,919 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:44,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:44,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:44,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:44,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:44,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:44,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:44,924 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:44,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:44,925 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:44,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:44,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:44,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:44,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:44,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:44,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:44,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:44,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:44,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:44,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:44,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:44,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:44,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:31:45,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:45,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:45,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:45,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:45,231 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:45,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-10-15 03:31:45,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767de573f/b86a1c4fce42496d9c2079dd8da83789/FLAGc6210e38d [2019-10-15 03:31:45,754 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:45,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-10-15 03:31:45,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767de573f/b86a1c4fce42496d9c2079dd8da83789/FLAGc6210e38d [2019-10-15 03:31:46,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767de573f/b86a1c4fce42496d9c2079dd8da83789 [2019-10-15 03:31:46,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:46,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:46,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:46,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:46,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:46,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba93b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46, skipping insertion in model container [2019-10-15 03:31:46,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,146 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:46,198 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:46,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:46,521 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:46,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:46,693 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:46,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46 WrapperNode [2019-10-15 03:31:46,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:46,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:46,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:46,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:46,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (1/1) ... [2019-10-15 03:31:46,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:46,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:46,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:46,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:46,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (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 [2019-10-15 03:31:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:31:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:31:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:31:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:31:46,803 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:31:46,804 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:31:46,805 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:31:46,805 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:31:46,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:31:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:31:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:31:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:47,602 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:47,602 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 03:31:47,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:47 BoogieIcfgContainer [2019-10-15 03:31:47,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:47,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:47,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:47,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:47,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:46" (1/3) ... [2019-10-15 03:31:47,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a01bba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:47, skipping insertion in model container [2019-10-15 03:31:47,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:46" (2/3) ... [2019-10-15 03:31:47,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a01bba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:47, skipping insertion in model container [2019-10-15 03:31:47,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:47" (3/3) ... [2019-10-15 03:31:47,612 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2019-10-15 03:31:47,622 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:47,629 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:47,639 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:47,664 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:47,664 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:47,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:47,665 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:47,665 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:47,665 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:47,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:47,666 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2019-10-15 03:31:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:31:47,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:47,696 INFO L380 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] [2019-10-15 03:31:47,698 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash 458852481, now seen corresponding path program 1 times [2019-10-15 03:31:47,710 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:47,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66355488] [2019-10-15 03:31:47,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:47,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:47,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:48,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66355488] [2019-10-15 03:31:48,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:48,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:48,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92880391] [2019-10-15 03:31:48,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:48,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:48,096 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2019-10-15 03:31:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:48,505 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2019-10-15 03:31:48,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:48,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-10-15 03:31:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:48,521 INFO L225 Difference]: With dead ends: 285 [2019-10-15 03:31:48,521 INFO L226 Difference]: Without dead ends: 181 [2019-10-15 03:31:48,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-15 03:31:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-10-15 03:31:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-15 03:31:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 215 transitions. [2019-10-15 03:31:48,658 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 215 transitions. Word has length 56 [2019-10-15 03:31:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:48,659 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 215 transitions. [2019-10-15 03:31:48,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 215 transitions. [2019-10-15 03:31:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:31:48,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:48,665 INFO L380 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] [2019-10-15 03:31:48,666 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1097636960, now seen corresponding path program 1 times [2019-10-15 03:31:48,667 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:48,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894721472] [2019-10-15 03:31:48,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:48,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:48,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:48,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894721472] [2019-10-15 03:31:48,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:48,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:48,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842817491] [2019-10-15 03:31:48,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:48,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:48,850 INFO L87 Difference]: Start difference. First operand 177 states and 215 transitions. Second operand 3 states. [2019-10-15 03:31:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:48,929 INFO L93 Difference]: Finished difference Result 487 states and 633 transitions. [2019-10-15 03:31:48,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:48,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-10-15 03:31:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:48,935 INFO L225 Difference]: With dead ends: 487 [2019-10-15 03:31:48,935 INFO L226 Difference]: Without dead ends: 326 [2019-10-15 03:31:48,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-15 03:31:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2019-10-15 03:31:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-10-15 03:31:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 408 transitions. [2019-10-15 03:31:49,009 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 408 transitions. Word has length 56 [2019-10-15 03:31:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:49,017 INFO L462 AbstractCegarLoop]: Abstraction has 324 states and 408 transitions. [2019-10-15 03:31:49,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 408 transitions. [2019-10-15 03:31:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 03:31:49,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:49,025 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:49,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2069013347, now seen corresponding path program 1 times [2019-10-15 03:31:49,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:49,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648323948] [2019-10-15 03:31:49,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 03:31:49,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648323948] [2019-10-15 03:31:49,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:49,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:49,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156282543] [2019-10-15 03:31:49,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:49,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:49,141 INFO L87 Difference]: Start difference. First operand 324 states and 408 transitions. Second operand 4 states. [2019-10-15 03:31:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:49,247 INFO L93 Difference]: Finished difference Result 841 states and 1087 transitions. [2019-10-15 03:31:49,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:49,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-15 03:31:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:49,255 INFO L225 Difference]: With dead ends: 841 [2019-10-15 03:31:49,255 INFO L226 Difference]: Without dead ends: 534 [2019-10-15 03:31:49,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2019-10-15 03:31:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 452. [2019-10-15 03:31:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-15 03:31:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 574 transitions. [2019-10-15 03:31:49,341 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 574 transitions. Word has length 91 [2019-10-15 03:31:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:49,342 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 574 transitions. [2019-10-15 03:31:49,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 574 transitions. [2019-10-15 03:31:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 03:31:49,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:49,354 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:49,354 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:49,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1882668428, now seen corresponding path program 1 times [2019-10-15 03:31:49,355 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:49,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475028329] [2019-10-15 03:31:49,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:49,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-15 03:31:49,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475028329] [2019-10-15 03:31:49,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748992349] [2019-10-15 03:31:49,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:49,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:31:49,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 03:31:49,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 03:31:50,013 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:31:50,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-15 03:31:50,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11525514] [2019-10-15 03:31:50,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:50,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:50,018 INFO L87 Difference]: Start difference. First operand 452 states and 574 transitions. Second operand 4 states. [2019-10-15 03:31:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:50,226 INFO L93 Difference]: Finished difference Result 740 states and 963 transitions. [2019-10-15 03:31:50,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:50,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 03:31:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:50,231 INFO L225 Difference]: With dead ends: 740 [2019-10-15 03:31:50,231 INFO L226 Difference]: Without dead ends: 526 [2019-10-15 03:31:50,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2019-10-15 03:31:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2019-10-15 03:31:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-15 03:31:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 651 transitions. [2019-10-15 03:31:50,277 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 651 transitions. Word has length 131 [2019-10-15 03:31:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:50,278 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 651 transitions. [2019-10-15 03:31:50,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 651 transitions. [2019-10-15 03:31:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:31:50,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:50,282 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:50,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:50,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 628789896, now seen corresponding path program 1 times [2019-10-15 03:31:50,490 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:50,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779390019] [2019-10-15 03:31:50,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:50,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 38 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 03:31:50,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779390019] [2019-10-15 03:31:50,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671777496] [2019-10-15 03:31:50,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:50,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:31:50,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 03:31:50,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:51,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:51,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:51,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:51,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-15 03:31:51,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979431108] [2019-10-15 03:31:51,458 INFO L162 IcfgInterpreter]: Started Sifa with 94 locations of interest [2019-10-15 03:31:51,459 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:31:51,471 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:31:51,487 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:31:51,489 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:31:51,743 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-10-15 03:31:51,780 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-10-15 03:31:52,154 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-10-15 03:31:52,205 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs