/usr/bin/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/transmitter.04.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:52:23,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:52:23,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:52:23,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:52:23,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:52:23,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:52:23,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:52:23,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:52:23,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:52:23,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:52:23,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:52:23,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:52:23,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:52:23,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:52:23,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:52:23,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:52:23,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:52:23,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:52:23,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:52:23,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:52:23,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:52:23,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:52:23,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:52:23,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:52:23,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:52:23,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:52:23,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:52:23,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:52:23,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:52:23,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:52:23,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:52:23,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:52:23,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:52:23,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:52:23,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:52:23,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:52:23,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:52:23,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:52:23,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:52:23,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:52:23,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:52:23,650 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 [2019-11-07 04:52:23,683 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:52:23,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:52:23,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:52:23,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:52:23,685 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:52:23,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:52:23,688 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:52:23,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:52:23,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:52:23,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:52:23,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:52:23,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:52:23,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:52:23,689 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:52:23,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:52:23,690 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:52:23,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:52:23,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:52:23,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:52:23,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:52:23,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:52:23,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:52:23,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:52:23,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:52:23,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:52:23,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:52:23,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:52:23,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:52:23,693 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 [2019-11-07 04:52:23,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:52:23,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:52:23,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:52:23,980 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:52:23,980 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:52:23,981 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.04.cil.c [2019-11-07 04:52:24,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a0c05c1/b8f15ca341f14f1c85d4b528d6c456e2/FLAG17e0b9ade [2019-11-07 04:52:24,495 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:52:24,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.04.cil.c [2019-11-07 04:52:24,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a0c05c1/b8f15ca341f14f1c85d4b528d6c456e2/FLAG17e0b9ade [2019-11-07 04:52:24,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a0c05c1/b8f15ca341f14f1c85d4b528d6c456e2 [2019-11-07 04:52:24,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:52:24,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:52:24,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:52:24,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:52:24,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:52:24,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:52:24" (1/1) ... [2019-11-07 04:52:24,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60924fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:24, skipping insertion in model container [2019-11-07 04:52:24,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:52:24" (1/1) ... [2019-11-07 04:52:24,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:52:24,976 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:52:25,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:52:25,278 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:52:25,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:52:25,471 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:52:25,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25 WrapperNode [2019-11-07 04:52:25,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:52:25,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:52:25,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:52:25,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:52:25,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (1/1) ... [2019-11-07 04:52:25,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:52:25,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:52:25,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:52:25,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:52:25,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (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 [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:52:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 04:52:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:52:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:52:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:52:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:52:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:52:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:52:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:52:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:52:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:52:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:52:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:52:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:52:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:52:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:52:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:52:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:52:26,922 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:52:26,923 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 04:52:26,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:52:26 BoogieIcfgContainer [2019-11-07 04:52:26,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:52:26,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:52:26,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:52:26,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:52:26,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:52:24" (1/3) ... [2019-11-07 04:52:26,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a95bdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:52:26, skipping insertion in model container [2019-11-07 04:52:26,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:52:25" (2/3) ... [2019-11-07 04:52:26,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a95bdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:52:26, skipping insertion in model container [2019-11-07 04:52:26,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:52:26" (3/3) ... [2019-11-07 04:52:26,933 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2019-11-07 04:52:26,943 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:52:26,952 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:52:26,964 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:52:26,991 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:52:26,991 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:52:26,992 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:52:26,993 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:52:26,994 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:52:26,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:52:26,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:52:26,994 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:52:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2019-11-07 04:52:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-07 04:52:27,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:27,045 INFO L410 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] [2019-11-07 04:52:27,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:27,053 INFO L82 PathProgramCache]: Analyzing trace with hash 278306888, now seen corresponding path program 1 times [2019-11-07 04:52:27,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:27,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736158280] [2019-11-07 04:52:27,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:52:27,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736158280] [2019-11-07 04:52:27,435 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:27,435 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:27,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746241203] [2019-11-07 04:52:27,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:27,444 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:27,461 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 4 states. [2019-11-07 04:52:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:27,989 INFO L93 Difference]: Finished difference Result 432 states and 596 transitions. [2019-11-07 04:52:27,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:27,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-11-07 04:52:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:28,025 INFO L225 Difference]: With dead ends: 432 [2019-11-07 04:52:28,026 INFO L226 Difference]: Without dead ends: 279 [2019-11-07 04:52:28,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-11-07 04:52:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2019-11-07 04:52:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2019-11-07 04:52:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 351 transitions. [2019-11-07 04:52:28,174 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 351 transitions. Word has length 80 [2019-11-07 04:52:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:28,175 INFO L462 AbstractCegarLoop]: Abstraction has 275 states and 351 transitions. [2019-11-07 04:52:28,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 351 transitions. [2019-11-07 04:52:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-07 04:52:28,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:28,181 INFO L410 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] [2019-11-07 04:52:28,181 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2118130103, now seen corresponding path program 1 times [2019-11-07 04:52:28,182 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:28,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558758489] [2019-11-07 04:52:28,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:52:28,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558758489] [2019-11-07 04:52:28,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:28,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:28,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831626449] [2019-11-07 04:52:28,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:28,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:28,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:28,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:28,397 INFO L87 Difference]: Start difference. First operand 275 states and 351 transitions. Second operand 4 states. [2019-11-07 04:52:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:28,749 INFO L93 Difference]: Finished difference Result 784 states and 1055 transitions. [2019-11-07 04:52:28,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:28,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-11-07 04:52:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:28,757 INFO L225 Difference]: With dead ends: 784 [2019-11-07 04:52:28,758 INFO L226 Difference]: Without dead ends: 525 [2019-11-07 04:52:28,762 INFO L630 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 [2019-11-07 04:52:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-11-07 04:52:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2019-11-07 04:52:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2019-11-07 04:52:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 660 transitions. [2019-11-07 04:52:28,845 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 660 transitions. Word has length 80 [2019-11-07 04:52:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:28,846 INFO L462 AbstractCegarLoop]: Abstraction has 520 states and 660 transitions. [2019-11-07 04:52:28,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 660 transitions. [2019-11-07 04:52:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-07 04:52:28,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:28,853 INFO L410 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] [2019-11-07 04:52:28,853 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash 412020584, now seen corresponding path program 1 times [2019-11-07 04:52:28,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:28,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327290151] [2019-11-07 04:52:28,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:52:29,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327290151] [2019-11-07 04:52:29,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:29,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:29,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905907690] [2019-11-07 04:52:29,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:29,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:29,003 INFO L87 Difference]: Start difference. First operand 520 states and 660 transitions. Second operand 4 states. [2019-11-07 04:52:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:29,330 INFO L93 Difference]: Finished difference Result 1512 states and 2034 transitions. [2019-11-07 04:52:29,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:29,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-11-07 04:52:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:29,338 INFO L225 Difference]: With dead ends: 1512 [2019-11-07 04:52:29,338 INFO L226 Difference]: Without dead ends: 1008 [2019-11-07 04:52:29,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-11-07 04:52:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 999. [2019-11-07 04:52:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-11-07 04:52:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1261 transitions. [2019-11-07 04:52:29,429 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1261 transitions. Word has length 80 [2019-11-07 04:52:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:29,430 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1261 transitions. [2019-11-07 04:52:29,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1261 transitions. [2019-11-07 04:52:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 04:52:29,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:29,445 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-07 04:52:29,446 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash -131310214, now seen corresponding path program 1 times [2019-11-07 04:52:29,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:29,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927016226] [2019-11-07 04:52:29,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:52:29,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927016226] [2019-11-07 04:52:29,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:29,593 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:29,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880651507] [2019-11-07 04:52:29,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:29,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:29,598 INFO L87 Difference]: Start difference. First operand 999 states and 1261 transitions. Second operand 4 states. [2019-11-07 04:52:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:29,798 INFO L93 Difference]: Finished difference Result 3057 states and 3972 transitions. [2019-11-07 04:52:29,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:29,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-11-07 04:52:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:29,813 INFO L225 Difference]: With dead ends: 3057 [2019-11-07 04:52:29,813 INFO L226 Difference]: Without dead ends: 2075 [2019-11-07 04:52:29,820 INFO L630 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 [2019-11-07 04:52:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2019-11-07 04:52:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1389. [2019-11-07 04:52:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2019-11-07 04:52:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1848 transitions. [2019-11-07 04:52:29,939 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1848 transitions. Word has length 96 [2019-11-07 04:52:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:29,942 INFO L462 AbstractCegarLoop]: Abstraction has 1389 states and 1848 transitions. [2019-11-07 04:52:29,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1848 transitions. [2019-11-07 04:52:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 04:52:29,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:29,975 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:29,975 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash -427602276, now seen corresponding path program 1 times [2019-11-07 04:52:29,976 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:29,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435781813] [2019-11-07 04:52:29,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 04:52:30,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435781813] [2019-11-07 04:52:30,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:30,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:52:30,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004378345] [2019-11-07 04:52:30,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:30,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:52:30,106 INFO L87 Difference]: Start difference. First operand 1389 states and 1848 transitions. Second operand 3 states. [2019-11-07 04:52:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:30,243 INFO L93 Difference]: Finished difference Result 3601 states and 4907 transitions. [2019-11-07 04:52:30,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:30,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-11-07 04:52:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:30,260 INFO L225 Difference]: With dead ends: 3601 [2019-11-07 04:52:30,261 INFO L226 Difference]: Without dead ends: 2229 [2019-11-07 04:52:30,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:52:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2019-11-07 04:52:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1917. [2019-11-07 04:52:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2019-11-07 04:52:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2616 transitions. [2019-11-07 04:52:30,406 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2616 transitions. Word has length 144 [2019-11-07 04:52:30,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:30,409 INFO L462 AbstractCegarLoop]: Abstraction has 1917 states and 2616 transitions. [2019-11-07 04:52:30,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2616 transitions. [2019-11-07 04:52:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 04:52:30,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:30,418 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:30,418 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash 232824637, now seen corresponding path program 1 times [2019-11-07 04:52:30,427 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:30,427 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822562443] [2019-11-07 04:52:30,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 04:52:30,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822562443] [2019-11-07 04:52:30,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739986193] [2019-11-07 04:52:30,591 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 [2019-11-07 04:52:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:30,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:52:30,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 04:52:30,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 04:52:31,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:31,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:52:31,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007354906] [2019-11-07 04:52:31,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:31,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:52:31,031 INFO L87 Difference]: Start difference. First operand 1917 states and 2616 transitions. Second operand 4 states. [2019-11-07 04:52:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:31,581 INFO L93 Difference]: Finished difference Result 5662 states and 8096 transitions. [2019-11-07 04:52:31,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:31,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 04:52:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:31,612 INFO L225 Difference]: With dead ends: 5662 [2019-11-07 04:52:31,613 INFO L226 Difference]: Without dead ends: 3761 [2019-11-07 04:52:31,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:52:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2019-11-07 04:52:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3701. [2019-11-07 04:52:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3701 states. [2019-11-07 04:52:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3701 states to 3701 states and 5024 transitions. [2019-11-07 04:52:31,875 INFO L78 Accepts]: Start accepts. Automaton has 3701 states and 5024 transitions. Word has length 145 [2019-11-07 04:52:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:31,875 INFO L462 AbstractCegarLoop]: Abstraction has 3701 states and 5024 transitions. [2019-11-07 04:52:31,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3701 states and 5024 transitions. [2019-11-07 04:52:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 04:52:31,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:31,888 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:32,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:32,101 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2106707675, now seen corresponding path program 1 times [2019-11-07 04:52:32,102 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:32,102 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662580691] [2019-11-07 04:52:32,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 04:52:32,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662580691] [2019-11-07 04:52:32,172 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:32,172 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:52:32,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731216027] [2019-11-07 04:52:32,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:32,173 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:52:32,174 INFO L87 Difference]: Start difference. First operand 3701 states and 5024 transitions. Second operand 3 states. [2019-11-07 04:52:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:32,584 INFO L93 Difference]: Finished difference Result 9555 states and 13238 transitions. [2019-11-07 04:52:32,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:32,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-11-07 04:52:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:32,631 INFO L225 Difference]: With dead ends: 9555 [2019-11-07 04:52:32,631 INFO L226 Difference]: Without dead ends: 5871 [2019-11-07 04:52:32,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:52:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2019-11-07 04:52:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 5395. [2019-11-07 04:52:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5395 states. [2019-11-07 04:52:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 7378 transitions. [2019-11-07 04:52:33,088 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 7378 transitions. Word has length 146 [2019-11-07 04:52:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:33,091 INFO L462 AbstractCegarLoop]: Abstraction has 5395 states and 7378 transitions. [2019-11-07 04:52:33,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 7378 transitions. [2019-11-07 04:52:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 04:52:33,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:33,110 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:33,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1200881990, now seen corresponding path program 1 times [2019-11-07 04:52:33,112 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:33,112 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812748675] [2019-11-07 04:52:33,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 04:52:33,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812748675] [2019-11-07 04:52:33,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:33,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:33,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977601074] [2019-11-07 04:52:33,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:33,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:33,274 INFO L87 Difference]: Start difference. First operand 5395 states and 7378 transitions. Second operand 4 states. [2019-11-07 04:52:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:33,744 INFO L93 Difference]: Finished difference Result 8603 states and 11658 transitions. [2019-11-07 04:52:33,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:33,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-11-07 04:52:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:33,787 INFO L225 Difference]: With dead ends: 8603 [2019-11-07 04:52:33,787 INFO L226 Difference]: Without dead ends: 6371 [2019-11-07 04:52:33,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2019-11-07 04:52:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6355. [2019-11-07 04:52:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6355 states. [2019-11-07 04:52:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 8426 transitions. [2019-11-07 04:52:34,315 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 8426 transitions. Word has length 146 [2019-11-07 04:52:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:34,316 INFO L462 AbstractCegarLoop]: Abstraction has 6355 states and 8426 transitions. [2019-11-07 04:52:34,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 8426 transitions. [2019-11-07 04:52:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 04:52:34,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:34,337 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:34,337 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash -654877300, now seen corresponding path program 1 times [2019-11-07 04:52:34,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:34,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605588829] [2019-11-07 04:52:34,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:52:34,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605588829] [2019-11-07 04:52:34,499 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:34,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:52:34,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432135353] [2019-11-07 04:52:34,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:52:34,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:52:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:52:34,503 INFO L87 Difference]: Start difference. First operand 6355 states and 8426 transitions. Second operand 8 states. [2019-11-07 04:52:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:36,158 INFO L93 Difference]: Finished difference Result 17513 states and 24077 transitions. [2019-11-07 04:52:36,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:52:36,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 148 [2019-11-07 04:52:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:36,231 INFO L225 Difference]: With dead ends: 17513 [2019-11-07 04:52:36,231 INFO L226 Difference]: Without dead ends: 11175 [2019-11-07 04:52:36,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:52:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11175 states. [2019-11-07 04:52:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11175 to 11024. [2019-11-07 04:52:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11024 states. [2019-11-07 04:52:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11024 states to 11024 states and 15154 transitions. [2019-11-07 04:52:37,287 INFO L78 Accepts]: Start accepts. Automaton has 11024 states and 15154 transitions. Word has length 148 [2019-11-07 04:52:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:37,289 INFO L462 AbstractCegarLoop]: Abstraction has 11024 states and 15154 transitions. [2019-11-07 04:52:37,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:52:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 15154 transitions. [2019-11-07 04:52:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 04:52:37,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:37,309 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:37,309 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1049664021, now seen corresponding path program 1 times [2019-11-07 04:52:37,310 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:37,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74343427] [2019-11-07 04:52:37,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:52:37,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74343427] [2019-11-07 04:52:37,471 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:37,471 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 04:52:37,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907804393] [2019-11-07 04:52:37,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:52:37,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:52:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:52:37,477 INFO L87 Difference]: Start difference. First operand 11024 states and 15154 transitions. Second operand 9 states. [2019-11-07 04:52:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:40,471 INFO L93 Difference]: Finished difference Result 34615 states and 49495 transitions. [2019-11-07 04:52:40,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 04:52:40,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2019-11-07 04:52:40,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:40,569 INFO L225 Difference]: With dead ends: 34615 [2019-11-07 04:52:40,569 INFO L226 Difference]: Without dead ends: 19246 [2019-11-07 04:52:40,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-11-07 04:52:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19246 states. [2019-11-07 04:52:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19246 to 17938. [2019-11-07 04:52:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17938 states. [2019-11-07 04:52:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17938 states to 17938 states and 24931 transitions. [2019-11-07 04:52:42,003 INFO L78 Accepts]: Start accepts. Automaton has 17938 states and 24931 transitions. Word has length 147 [2019-11-07 04:52:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:42,007 INFO L462 AbstractCegarLoop]: Abstraction has 17938 states and 24931 transitions. [2019-11-07 04:52:42,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 04:52:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 17938 states and 24931 transitions. [2019-11-07 04:52:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 04:52:42,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:42,027 INFO L410 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, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:42,028 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 432632579, now seen corresponding path program 1 times [2019-11-07 04:52:42,029 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:42,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807602959] [2019-11-07 04:52:42,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 04:52:42,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807602959] [2019-11-07 04:52:42,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395883392] [2019-11-07 04:52:42,121 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 [2019-11-07 04:52:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:42,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:52:42,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:52:42,365 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 04:52:42,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:42,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-11-07 04:52:42,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147940657] [2019-11-07 04:52:42,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:42,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:42,533 INFO L87 Difference]: Start difference. First operand 17938 states and 24931 transitions. Second operand 3 states. [2019-11-07 04:52:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:44,274 INFO L93 Difference]: Finished difference Result 34041 states and 49118 transitions. [2019-11-07 04:52:44,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:44,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 04:52:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:44,401 INFO L225 Difference]: With dead ends: 34041 [2019-11-07 04:52:44,402 INFO L226 Difference]: Without dead ends: 24031 [2019-11-07 04:52:44,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24031 states. [2019-11-07 04:52:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24031 to 21251. [2019-11-07 04:52:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21251 states. [2019-11-07 04:52:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21251 states to 21251 states and 29982 transitions. [2019-11-07 04:52:46,536 INFO L78 Accepts]: Start accepts. Automaton has 21251 states and 29982 transitions. Word has length 149 [2019-11-07 04:52:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:46,537 INFO L462 AbstractCegarLoop]: Abstraction has 21251 states and 29982 transitions. [2019-11-07 04:52:46,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21251 states and 29982 transitions. [2019-11-07 04:52:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 04:52:46,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:46,568 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:46,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:46,781 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1641123869, now seen corresponding path program 1 times [2019-11-07 04:52:46,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:46,782 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937468108] [2019-11-07 04:52:46,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 04:52:47,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937468108] [2019-11-07 04:52:47,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624021850] [2019-11-07 04:52:47,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:47,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:52:47,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:52:48,514 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:48,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:48,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:48,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:48,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 04:52:48,940 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:48,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21, 8] total 34 [2019-11-07 04:52:48,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188655844] [2019-11-07 04:52:48,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 04:52:48,941 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:48,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 04:52:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 04:52:48,942 INFO L87 Difference]: Start difference. First operand 21251 states and 29982 transitions. Second operand 11 states. [2019-11-07 04:52:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:53,404 INFO L93 Difference]: Finished difference Result 79763 states and 138390 transitions. [2019-11-07 04:52:53,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:52:53,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2019-11-07 04:52:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:53,793 INFO L225 Difference]: With dead ends: 79763 [2019-11-07 04:52:53,793 INFO L226 Difference]: Without dead ends: 58529 [2019-11-07 04:52:54,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 332 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=1961, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 04:52:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58529 states.