/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:17:47,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:17:47,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:17:47,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:17:47,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:17:47,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:17:47,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:17:47,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:17:47,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:17:47,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:17:47,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:17:47,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:17:47,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:17:47,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:17:47,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:17:47,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:17:47,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:17:47,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:17:47,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:17:47,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:17:47,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:17:47,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:17:47,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:17:47,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:17:47,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:17:47,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:17:47,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:17:47,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:17:47,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:17:47,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:17:47,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:17:47,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:17:47,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:17:47,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:17:47,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:17:47,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:17:47,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:17:47,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:17:47,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:17:47,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:17:47,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:17:47,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:17:47,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:17:47,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:17:47,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:17:47,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:17:47,922 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:17:47,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:17:47,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:17:47,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:17:47,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:17:47,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:17:47,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:17:47,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:17:47,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:17:47,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:17:47,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:17:47,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:17:47,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:17:47,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:17:47,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:17:47,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:17:47,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:17:47,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:17:47,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:17:47,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:17:47,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:17:48,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:17:48,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:17:48,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:17:48,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:17:48,264 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:17:48,265 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-18 12:17:48,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6968495/12c3e77ae597491c8d9825c31ea759f0/FLAGb0126f54d [2020-08-18 12:17:48,897 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:17:48,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2020-08-18 12:17:48,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6968495/12c3e77ae597491c8d9825c31ea759f0/FLAGb0126f54d [2020-08-18 12:17:49,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d6968495/12c3e77ae597491c8d9825c31ea759f0 [2020-08-18 12:17:49,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:17:49,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:17:49,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:17:49,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:17:49,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:17:49,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ae2273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49, skipping insertion in model container [2020-08-18 12:17:49,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:17:49,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:17:49,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:17:49,504 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:17:49,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:17:49,669 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:17:49,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49 WrapperNode [2020-08-18 12:17:49,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:17:49,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:17:49,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:17:49,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:17:49,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... [2020-08-18 12:17:49,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:17:49,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:17:49,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:17:49,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:17:49,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:17:49,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:17:49,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:17:49,778 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 12:17:49,778 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 12:17:49,779 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 12:17:49,780 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 12:17:49,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 12:17:49,780 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 12:17:49,780 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 12:17:49,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:17:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:17:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 12:17:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-18 12:17:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-18 12:17:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 12:17:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-18 12:17:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:17:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:17:50,295 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:17:50,296 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 12:17:50,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:17:50 BoogieIcfgContainer [2020-08-18 12:17:50,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:17:50,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:17:50,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:17:50,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:17:50,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:17:49" (1/3) ... [2020-08-18 12:17:50,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5353c7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:17:50, skipping insertion in model container [2020-08-18 12:17:50,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:17:49" (2/3) ... [2020-08-18 12:17:50,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5353c7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:17:50, skipping insertion in model container [2020-08-18 12:17:50,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:17:50" (3/3) ... [2020-08-18 12:17:50,312 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2020-08-18 12:17:50,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:17:50,337 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:17:50,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:17:50,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:17:50,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:17:50,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:17:50,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:17:50,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:17:50,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:17:50,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:17:50,381 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:17:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states. [2020-08-18 12:17:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:50,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:50,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:50,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -540085109, now seen corresponding path program 1 times [2020-08-18 12:17:50,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:50,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197824433] [2020-08-18 12:17:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:50,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197824433] [2020-08-18 12:17:50,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:50,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:17:50,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132082331] [2020-08-18 12:17:50,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:17:50,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:17:51,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:17:51,013 INFO L87 Difference]: Start difference. First operand 151 states. Second operand 9 states. [2020-08-18 12:17:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:53,137 INFO L93 Difference]: Finished difference Result 522 states and 794 transitions. [2020-08-18 12:17:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:17:53,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-18 12:17:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:53,159 INFO L225 Difference]: With dead ends: 522 [2020-08-18 12:17:53,159 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 12:17:53,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:17:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 12:17:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 257. [2020-08-18 12:17:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-18 12:17:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 346 transitions. [2020-08-18 12:17:53,266 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 346 transitions. Word has length 78 [2020-08-18 12:17:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:53,267 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 346 transitions. [2020-08-18 12:17:53,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:17:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 346 transitions. [2020-08-18 12:17:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:53,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:53,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:53,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:17:53,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 211359051, now seen corresponding path program 1 times [2020-08-18 12:17:53,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:53,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066276589] [2020-08-18 12:17:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:53,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066276589] [2020-08-18 12:17:53,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:53,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 12:17:53,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715744497] [2020-08-18 12:17:53,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:17:53,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:17:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:17:53,524 INFO L87 Difference]: Start difference. First operand 257 states and 346 transitions. Second operand 10 states. [2020-08-18 12:17:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:54,681 INFO L93 Difference]: Finished difference Result 599 states and 848 transitions. [2020-08-18 12:17:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:17:54,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-18 12:17:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:54,687 INFO L225 Difference]: With dead ends: 599 [2020-08-18 12:17:54,688 INFO L226 Difference]: Without dead ends: 361 [2020-08-18 12:17:54,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-18 12:17:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-08-18 12:17:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 257. [2020-08-18 12:17:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-18 12:17:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 339 transitions. [2020-08-18 12:17:54,777 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 339 transitions. Word has length 78 [2020-08-18 12:17:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:54,777 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 339 transitions. [2020-08-18 12:17:54,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:17:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 339 transitions. [2020-08-18 12:17:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:54,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:54,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:54,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:17:54,788 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2119705461, now seen corresponding path program 1 times [2020-08-18 12:17:54,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:54,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829689196] [2020-08-18 12:17:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:54,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829689196] [2020-08-18 12:17:54,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:54,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 12:17:54,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307882854] [2020-08-18 12:17:54,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:17:54,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:17:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:17:54,991 INFO L87 Difference]: Start difference. First operand 257 states and 339 transitions. Second operand 10 states. [2020-08-18 12:17:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:56,409 INFO L93 Difference]: Finished difference Result 722 states and 1058 transitions. [2020-08-18 12:17:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:17:56,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-18 12:17:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:56,415 INFO L225 Difference]: With dead ends: 722 [2020-08-18 12:17:56,415 INFO L226 Difference]: Without dead ends: 484 [2020-08-18 12:17:56,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:17:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-08-18 12:17:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 309. [2020-08-18 12:17:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-08-18 12:17:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 392 transitions. [2020-08-18 12:17:56,458 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 392 transitions. Word has length 78 [2020-08-18 12:17:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:56,458 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 392 transitions. [2020-08-18 12:17:56,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:17:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 392 transitions. [2020-08-18 12:17:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:56,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:56,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:56,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:17:56,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -579817174, now seen corresponding path program 1 times [2020-08-18 12:17:56,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:56,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195938189] [2020-08-18 12:17:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:56,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195938189] [2020-08-18 12:17:56,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:56,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 12:17:56,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818853314] [2020-08-18 12:17:56,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:17:56,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:17:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:17:56,686 INFO L87 Difference]: Start difference. First operand 309 states and 392 transitions. Second operand 10 states. [2020-08-18 12:17:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:58,084 INFO L93 Difference]: Finished difference Result 744 states and 1001 transitions. [2020-08-18 12:17:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:17:58,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-18 12:17:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:58,089 INFO L225 Difference]: With dead ends: 744 [2020-08-18 12:17:58,089 INFO L226 Difference]: Without dead ends: 455 [2020-08-18 12:17:58,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:17:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-08-18 12:17:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 329. [2020-08-18 12:17:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-08-18 12:17:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 412 transitions. [2020-08-18 12:17:58,141 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 412 transitions. Word has length 78 [2020-08-18 12:17:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:58,141 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 412 transitions. [2020-08-18 12:17:58,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:17:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 412 transitions. [2020-08-18 12:17:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:58,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:58,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:58,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:17:58,143 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -156170452, now seen corresponding path program 1 times [2020-08-18 12:17:58,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:58,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410759964] [2020-08-18 12:17:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:58,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410759964] [2020-08-18 12:17:58,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:58,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 12:17:58,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240998518] [2020-08-18 12:17:58,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:17:58,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:17:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:17:58,323 INFO L87 Difference]: Start difference. First operand 329 states and 412 transitions. Second operand 10 states. [2020-08-18 12:17:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:17:59,706 INFO L93 Difference]: Finished difference Result 774 states and 1027 transitions. [2020-08-18 12:17:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 12:17:59,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-18 12:17:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:17:59,711 INFO L225 Difference]: With dead ends: 774 [2020-08-18 12:17:59,711 INFO L226 Difference]: Without dead ends: 465 [2020-08-18 12:17:59,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:17:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-08-18 12:17:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 339. [2020-08-18 12:17:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-18 12:17:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 420 transitions. [2020-08-18 12:17:59,749 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 420 transitions. Word has length 78 [2020-08-18 12:17:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:17:59,750 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 420 transitions. [2020-08-18 12:17:59,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:17:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 420 transitions. [2020-08-18 12:17:59,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:17:59,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:17:59,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:17:59,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:17:59,752 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:17:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:17:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 118589162, now seen corresponding path program 1 times [2020-08-18 12:17:59,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:17:59,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751700468] [2020-08-18 12:17:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:17:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:17:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:17:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:17:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:17:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:17:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:17:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:17:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:17:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:17:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:17:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:17:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:17:59,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751700468] [2020-08-18 12:17:59,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:17:59,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 12:17:59,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965567229] [2020-08-18 12:17:59,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:17:59,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:17:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:17:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:17:59,914 INFO L87 Difference]: Start difference. First operand 339 states and 420 transitions. Second operand 10 states. [2020-08-18 12:18:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:01,355 INFO L93 Difference]: Finished difference Result 920 states and 1216 transitions. [2020-08-18 12:18:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 12:18:01,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-08-18 12:18:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:01,362 INFO L225 Difference]: With dead ends: 920 [2020-08-18 12:18:01,362 INFO L226 Difference]: Without dead ends: 600 [2020-08-18 12:18:01,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:18:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-08-18 12:18:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 375. [2020-08-18 12:18:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-08-18 12:18:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 445 transitions. [2020-08-18 12:18:01,410 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 445 transitions. Word has length 78 [2020-08-18 12:18:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:01,411 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 445 transitions. [2020-08-18 12:18:01,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:18:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 445 transitions. [2020-08-18 12:18:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 12:18:01,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:01,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:01,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:18:01,413 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 180628776, now seen corresponding path program 1 times [2020-08-18 12:18:01,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:01,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038834712] [2020-08-18 12:18:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:18:01,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038834712] [2020-08-18 12:18:01,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:01,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:18:01,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742720829] [2020-08-18 12:18:01,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:18:01,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:18:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:18:01,556 INFO L87 Difference]: Start difference. First operand 375 states and 445 transitions. Second operand 7 states. [2020-08-18 12:18:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:02,760 INFO L93 Difference]: Finished difference Result 1208 states and 1535 transitions. [2020-08-18 12:18:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 12:18:02,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-08-18 12:18:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:02,767 INFO L225 Difference]: With dead ends: 1208 [2020-08-18 12:18:02,767 INFO L226 Difference]: Without dead ends: 853 [2020-08-18 12:18:02,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-18 12:18:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-08-18 12:18:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 751. [2020-08-18 12:18:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 751 states. [2020-08-18 12:18:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 921 transitions. [2020-08-18 12:18:02,839 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 921 transitions. Word has length 78 [2020-08-18 12:18:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:02,839 INFO L479 AbstractCegarLoop]: Abstraction has 751 states and 921 transitions. [2020-08-18 12:18:02,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:18:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 921 transitions. [2020-08-18 12:18:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-18 12:18:02,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:02,842 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:02,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:18:02,842 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 972462964, now seen corresponding path program 1 times [2020-08-18 12:18:02,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:02,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604765212] [2020-08-18 12:18:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:02,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:18:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 12:18:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 12:18:03,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604765212] [2020-08-18 12:18:03,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:03,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:18:03,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051301092] [2020-08-18 12:18:03,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:18:03,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:18:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:03,102 INFO L87 Difference]: Start difference. First operand 751 states and 921 transitions. Second operand 9 states. [2020-08-18 12:18:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:04,838 INFO L93 Difference]: Finished difference Result 2122 states and 2794 transitions. [2020-08-18 12:18:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:18:04,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-18 12:18:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:04,849 INFO L225 Difference]: With dead ends: 2122 [2020-08-18 12:18:04,850 INFO L226 Difference]: Without dead ends: 1391 [2020-08-18 12:18:04,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:18:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-08-18 12:18:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1307. [2020-08-18 12:18:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2020-08-18 12:18:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1584 transitions. [2020-08-18 12:18:05,002 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1584 transitions. Word has length 123 [2020-08-18 12:18:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:05,003 INFO L479 AbstractCegarLoop]: Abstraction has 1307 states and 1584 transitions. [2020-08-18 12:18:05,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1584 transitions. [2020-08-18 12:18:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-18 12:18:05,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:05,006 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:18:05,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:18:05,007 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1319133239, now seen corresponding path program 1 times [2020-08-18 12:18:05,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:05,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784096172] [2020-08-18 12:18:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:18:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 12:18:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-18 12:18:05,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784096172] [2020-08-18 12:18:05,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:18:05,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 12:18:05,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298897793] [2020-08-18 12:18:05,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:18:05,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:18:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:05,218 INFO L87 Difference]: Start difference. First operand 1307 states and 1584 transitions. Second operand 9 states. [2020-08-18 12:18:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:07,096 INFO L93 Difference]: Finished difference Result 3361 states and 4209 transitions. [2020-08-18 12:18:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:18:07,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-08-18 12:18:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:07,107 INFO L225 Difference]: With dead ends: 3361 [2020-08-18 12:18:07,107 INFO L226 Difference]: Without dead ends: 1577 [2020-08-18 12:18:07,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:18:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-08-18 12:18:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1511. [2020-08-18 12:18:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2020-08-18 12:18:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1789 transitions. [2020-08-18 12:18:07,248 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1789 transitions. Word has length 123 [2020-08-18 12:18:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:07,248 INFO L479 AbstractCegarLoop]: Abstraction has 1511 states and 1789 transitions. [2020-08-18 12:18:07,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1789 transitions. [2020-08-18 12:18:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-18 12:18:07,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:07,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 12:18:07,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:18:07,254 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1505336733, now seen corresponding path program 1 times [2020-08-18 12:18:07,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:07,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841835749] [2020-08-18 12:18:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 12:18:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 12:18:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 12:18:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 12:18:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:18:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-18 12:18:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-18 12:18:07,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841835749] [2020-08-18 12:18:07,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:07,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:18:07,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289987421] [2020-08-18 12:18:07,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:18:07,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:18:07,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:07,471 INFO L87 Difference]: Start difference. First operand 1511 states and 1789 transitions. Second operand 9 states. [2020-08-18 12:18:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:08,816 INFO L93 Difference]: Finished difference Result 3075 states and 3746 transitions. [2020-08-18 12:18:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:18:08,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2020-08-18 12:18:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:08,826 INFO L225 Difference]: With dead ends: 3075 [2020-08-18 12:18:08,826 INFO L226 Difference]: Without dead ends: 1585 [2020-08-18 12:18:08,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-08-18 12:18:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-08-18 12:18:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1505. [2020-08-18 12:18:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-08-18 12:18:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1755 transitions. [2020-08-18 12:18:08,959 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1755 transitions. Word has length 177 [2020-08-18 12:18:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:08,959 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 1755 transitions. [2020-08-18 12:18:08,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1755 transitions. [2020-08-18 12:18:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-18 12:18:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:08,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 12:18:08,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:18:08,965 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1006491229, now seen corresponding path program 1 times [2020-08-18 12:18:08,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:08,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665979548] [2020-08-18 12:18:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 12:18:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-18 12:18:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 12:18:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 12:18:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:18:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 12:18:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-18 12:18:09,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665979548] [2020-08-18 12:18:09,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:09,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:18:09,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506443493] [2020-08-18 12:18:09,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:18:09,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:18:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:18:09,245 INFO L87 Difference]: Start difference. First operand 1505 states and 1755 transitions. Second operand 10 states. [2020-08-18 12:18:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:11,003 INFO L93 Difference]: Finished difference Result 3514 states and 4187 transitions. [2020-08-18 12:18:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 12:18:11,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 178 [2020-08-18 12:18:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:11,010 INFO L225 Difference]: With dead ends: 3514 [2020-08-18 12:18:11,011 INFO L226 Difference]: Without dead ends: 1021 [2020-08-18 12:18:11,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-08-18 12:18:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-08-18 12:18:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 985. [2020-08-18 12:18:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-08-18 12:18:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1123 transitions. [2020-08-18 12:18:11,133 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1123 transitions. Word has length 178 [2020-08-18 12:18:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:11,134 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1123 transitions. [2020-08-18 12:18:11,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:18:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1123 transitions. [2020-08-18 12:18:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-18 12:18:11,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:11,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-08-18 12:18:11,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:18:11,138 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2053123678, now seen corresponding path program 1 times [2020-08-18 12:18:11,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:11,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861379769] [2020-08-18 12:18:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:18:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 12:18:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 12:18:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 12:18:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:18:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 12:18:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-18 12:18:11,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861379769] [2020-08-18 12:18:11,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:11,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 12:18:11,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264981063] [2020-08-18 12:18:11,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 12:18:11,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:11,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 12:18:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-18 12:18:11,530 INFO L87 Difference]: Start difference. First operand 985 states and 1123 transitions. Second operand 12 states. [2020-08-18 12:18:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:13,571 INFO L93 Difference]: Finished difference Result 1223 states and 1418 transitions. [2020-08-18 12:18:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 12:18:13,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2020-08-18 12:18:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:13,579 INFO L225 Difference]: With dead ends: 1223 [2020-08-18 12:18:13,579 INFO L226 Difference]: Without dead ends: 1220 [2020-08-18 12:18:13,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:18:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-18 12:18:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1172. [2020-08-18 12:18:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-08-18 12:18:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1335 transitions. [2020-08-18 12:18:13,680 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1335 transitions. Word has length 178 [2020-08-18 12:18:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:13,681 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1335 transitions. [2020-08-18 12:18:13,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 12:18:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1335 transitions. [2020-08-18 12:18:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-18 12:18:13,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:13,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1] [2020-08-18 12:18:13,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:18:13,685 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash 5197958, now seen corresponding path program 1 times [2020-08-18 12:18:13,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:13,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330676794] [2020-08-18 12:18:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 12:18:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 12:18:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 12:18:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 12:18:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 12:18:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 12:18:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 12:18:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 12:18:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 12:18:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 12:18:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 12:18:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 12:18:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:18:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:18:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 12:18:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 12:18:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 12:18:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:18:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-18 12:18:13,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330676794] [2020-08-18 12:18:13,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:18:13,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:18:13,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104764421] [2020-08-18 12:18:13,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:18:13,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:18:13,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:18:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:18:13,952 INFO L87 Difference]: Start difference. First operand 1172 states and 1335 transitions. Second operand 9 states. [2020-08-18 12:18:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:18:14,922 INFO L93 Difference]: Finished difference Result 2003 states and 2338 transitions. [2020-08-18 12:18:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:18:14,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 182 [2020-08-18 12:18:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:18:14,929 INFO L225 Difference]: With dead ends: 2003 [2020-08-18 12:18:14,929 INFO L226 Difference]: Without dead ends: 1220 [2020-08-18 12:18:14,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-08-18 12:18:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-08-18 12:18:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1186. [2020-08-18 12:18:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1186 states. [2020-08-18 12:18:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1353 transitions. [2020-08-18 12:18:15,027 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1353 transitions. Word has length 182 [2020-08-18 12:18:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:18:15,028 INFO L479 AbstractCegarLoop]: Abstraction has 1186 states and 1353 transitions. [2020-08-18 12:18:15,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:18:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1353 transitions. [2020-08-18 12:18:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-08-18 12:18:15,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:18:15,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1] [2020-08-18 12:18:15,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 12:18:15,031 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:18:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:18:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1390323253, now seen corresponding path program 1 times [2020-08-18 12:18:15,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:18:15,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102340114] [2020-08-18 12:18:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:18:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:18:15,058 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:18:15,059 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:18:15,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 12:18:15,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:18:15 BoogieIcfgContainer [2020-08-18 12:18:15,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:18:15,101 INFO L168 Benchmark]: Toolchain (without parser) took 25861.98 ms. Allocated memory was 147.3 MB in the beginning and 528.0 MB in the end (delta: 380.6 MB). Free memory was 103.0 MB in the beginning and 297.2 MB in the end (delta: -194.2 MB). Peak memory consumption was 186.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:18:15,102 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:18:15,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.97 ms. Allocated memory was 147.3 MB in the beginning and 201.9 MB in the end (delta: 54.5 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:18:15,103 INFO L168 Benchmark]: Boogie Preprocessor took 43.17 ms. Allocated memory is still 201.9 MB. Free memory was 177.8 MB in the beginning and 175.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:18:15,104 INFO L168 Benchmark]: RCFGBuilder took 588.60 ms. Allocated memory is still 201.9 MB. Free memory was 175.8 MB in the beginning and 143.2 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:18:15,105 INFO L168 Benchmark]: TraceAbstraction took 24795.09 ms. Allocated memory was 201.9 MB in the beginning and 528.0 MB in the end (delta: 326.1 MB). Free memory was 142.5 MB in the beginning and 297.2 MB in the end (delta: -154.7 MB). Peak memory consumption was 171.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:18:15,108 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 429.97 ms. Allocated memory was 147.3 MB in the beginning and 201.9 MB in the end (delta: 54.5 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.17 ms. Allocated memory is still 201.9 MB. Free memory was 177.8 MB in the beginning and 175.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.60 ms. Allocated memory is still 201.9 MB. Free memory was 175.8 MB in the beginning and 143.2 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24795.09 ms. Allocated memory was 201.9 MB in the beginning and 528.0 MB in the end (delta: 326.1 MB). Free memory was 142.5 MB in the beginning and 297.2 MB in the end (delta: -154.7 MB). Peak memory consumption was 171.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int m_pc = 0; [L15] int t1_pc = 0; [L16] int m_st ; [L17] int t1_st ; [L18] int m_i ; [L19] int t1_i ; [L20] int M_E = 2; [L21] int T1_E = 2; [L22] int E_M = 2; [L23] int E_1 = 2; [L27] int token ; [L29] int local ; [L475] int __retres1 ; [L479] CALL init_model() [L390] m_i = 1 [L391] t1_i = 1 [L479] RET init_model() [L480] CALL start_simulation() [L416] int kernel_st ; [L417] int tmp ; [L418] int tmp___0 ; [L422] kernel_st = 0 [L423] FCALL update_channels() [L424] CALL init_threads() [L172] COND TRUE m_i == 1 [L173] m_st = 0 [L177] COND TRUE t1_i == 1 [L178] t1_st = 0 [L424] RET init_threads() [L425] CALL fire_delta_events() [L261] COND FALSE !(M_E == 0) [L266] COND FALSE !(T1_E == 0) [L271] COND FALSE !(E_M == 0) [L276] COND FALSE !(E_1 == 0) [L425] RET fire_delta_events() [L426] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND FALSE !(t1_pc == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L426] RET activate_threads() [L427] CALL reset_delta_events() [L289] COND FALSE !(M_E == 1) [L294] COND FALSE !(T1_E == 1) [L299] COND FALSE !(E_M == 1) [L304] COND FALSE !(E_1 == 1) [L427] RET reset_delta_events() [L430] COND TRUE 1 [L433] kernel_st = 1 [L434] CALL eval() [L208] int tmp ; [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND FALSE !(\read(tmp_ndt_1)) [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND TRUE t1_pc == 0 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND TRUE m_pc == 0 [L45] COND TRUE 1 [L48] token = __VERIFIER_nondet_int() [L49] local = token [L50] E_1 = 1 [L51] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND FALSE !(m_pc == 1) [L136] __retres1 = 0 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND FALSE !(\read(tmp)) [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND TRUE E_1 == 1 [L147] __retres1 = 1 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND TRUE \read(tmp___0) [L330] t1_st = 0 [L343] RET activate_threads() [L51] RET immediate_notify() [L52] E_1 = 2 [L53] m_pc = 1 [L54] m_st = 2 [L228] RET master() [L236] COND TRUE t1_st == 0 [L237] int tmp_ndt_2; [L238] tmp_ndt_2 = __VERIFIER_nondet_int() [L239] COND TRUE \read(tmp_ndt_2) [L241] t1_st = 1 [L242] CALL transmit1() [L90] COND FALSE !(t1_pc == 0) [L93] COND TRUE t1_pc == 1 [L109] token += 1 [L110] E_M = 1 [L111] CALL immediate_notify() [L343] CALL activate_threads() [L314] int tmp ; [L315] int tmp___0 ; [L319] CALL, EXPR is_master_triggered() [L123] int __retres1 ; [L126] COND TRUE m_pc == 1 [L127] COND TRUE E_M == 1 [L128] __retres1 = 1 [L138] return (__retres1); [L319] RET, EXPR is_master_triggered() [L319] tmp = is_master_triggered() [L321] COND TRUE \read(tmp) [L322] m_st = 0 [L327] CALL, EXPR is_transmit1_triggered() [L142] int __retres1 ; [L145] COND TRUE t1_pc == 1 [L146] COND FALSE !(E_1 == 1) [L155] __retres1 = 0 [L157] return (__retres1); [L327] RET, EXPR is_transmit1_triggered() [L327] tmp___0 = is_transmit1_triggered() [L329] COND FALSE !(\read(tmp___0)) [L343] RET activate_threads() [L111] RET immediate_notify() [L112] E_M = 2 [L101] COND TRUE 1 [L103] t1_pc = 1 [L104] t1_st = 2 [L242] RET transmit1() [L212] COND TRUE 1 [L215] CALL, EXPR exists_runnable_thread() [L187] int __retres1 ; [L190] COND TRUE m_st == 0 [L191] __retres1 = 1 [L203] return (__retres1); [L215] RET, EXPR exists_runnable_thread() [L215] tmp = exists_runnable_thread() [L217] COND TRUE \read(tmp) [L222] COND TRUE m_st == 0 [L223] int tmp_ndt_1; [L224] tmp_ndt_1 = __VERIFIER_nondet_int() [L225] COND TRUE \read(tmp_ndt_1) [L227] m_st = 1 [L228] CALL master() [L32] int tmp_var = __VERIFIER_nondet_int(); [L34] COND FALSE !(m_pc == 0) [L37] COND TRUE m_pc == 1 [L59] COND FALSE !(token != local + 1) [L64] COND TRUE tmp_var <= 5 [L65] COND TRUE tmp_var >= 5 [L70] COND TRUE tmp_var <= 5 [L71] COND TRUE tmp_var >= 5 [L72] COND TRUE tmp_var == 5 [L73] CALL error() [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 21 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.6s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2071 SDtfs, 7639 SDslu, 593 SDs, 0 SdLazy, 12312 SolverSat, 4252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 662 GetRequests, 436 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1511occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 1320 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1690 NumberOfCodeBlocks, 1690 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1494 ConstructedInterpolants, 0 QuantifiedInterpolants, 452054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 474/494 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...