/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:58:00,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:58:00,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:58:00,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:58:00,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:58:00,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:58:00,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:58:00,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:58:00,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:58:00,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:58:00,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:58:00,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:58:00,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:58:00,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:58:00,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:58:00,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:58:00,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:58:00,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:58:00,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:58:00,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:58:00,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:58:00,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:58:00,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:58:00,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:58:00,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:58:00,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:58:00,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:58:00,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:58:00,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:58:00,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:58:00,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:58:00,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:58:00,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:58:00,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:58:00,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:58:00,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:58:00,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:58:00,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:58:00,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:58:00,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:58:00,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:58:00,477 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 [2020-08-19 06:58:00,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:58:00,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:58:00,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:58:00,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:58:00,521 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:58:00,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:58:00,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:58:00,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:58:00,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:58:00,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:58:00,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:58:00,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:58:00,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:58:00,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:58:00,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:58:00,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:58:00,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:58:00,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:58:00,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:58:00,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:58:00,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:58:00,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:58:00,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:58:00,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:58:00,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:58:00,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:58:00,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:58:00,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:58:00,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:58:00,527 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=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:58:00,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:58:00,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:58:00,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:58:00,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:58:00,834 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:58:00,835 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 06:58:00,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d29bada/7f460bbef9424f0c9d6b291a0c027abe/FLAGb28091d5d [2020-08-19 06:58:01,363 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:58:01,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 06:58:01,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d29bada/7f460bbef9424f0c9d6b291a0c027abe/FLAGb28091d5d [2020-08-19 06:58:01,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d29bada/7f460bbef9424f0c9d6b291a0c027abe [2020-08-19 06:58:01,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:58:01,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:58:01,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:58:01,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:58:01,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:58:01,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:58:01" (1/1) ... [2020-08-19 06:58:01,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:01, skipping insertion in model container [2020-08-19 06:58:01,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:58:01" (1/1) ... [2020-08-19 06:58:01,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:58:01,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:58:02,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:58:02,013 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:58:02,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:58:02,063 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:58:02,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02 WrapperNode [2020-08-19 06:58:02,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:58:02,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:58:02,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:58:02,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:58:02,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (1/1) ... [2020-08-19 06:58:02,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:58:02,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:58:02,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:58:02,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:58:02,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (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 [2020-08-19 06:58:02,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:58:02,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 06:58:02,255 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 06:58:02,256 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 06:58:02,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:58:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:58:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:58:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 06:58:02,257 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 06:58:02,258 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:58:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:58:02,717 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:58:02,717 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 06:58:02,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:58:02 BoogieIcfgContainer [2020-08-19 06:58:02,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:58:02,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:58:02,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:58:02,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:58:02,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:58:01" (1/3) ... [2020-08-19 06:58:02,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f03cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:58:02, skipping insertion in model container [2020-08-19 06:58:02,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:58:02" (2/3) ... [2020-08-19 06:58:02,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f03cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:58:02, skipping insertion in model container [2020-08-19 06:58:02,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:58:02" (3/3) ... [2020-08-19 06:58:02,738 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-19 06:58:02,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:58:02,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:58:02,781 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:58:02,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:58:02,805 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:58:02,805 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:58:02,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:58:02,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:58:02,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:58:02,805 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:58:02,805 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:58:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-19 06:58:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 06:58:02,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:02,842 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] [2020-08-19 06:58:02,842 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:02,848 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-19 06:58:02,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:02,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464232645] [2020-08-19 06:58:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:58:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:03,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464232645] [2020-08-19 06:58:03,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:03,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:58:03,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065384166] [2020-08-19 06:58:03,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:58:03,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:58:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:58:03,439 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-19 06:58:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:04,531 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-19 06:58:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:58:04,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-19 06:58:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:04,549 INFO L225 Difference]: With dead ends: 356 [2020-08-19 06:58:04,549 INFO L226 Difference]: Without dead ends: 248 [2020-08-19 06:58:04,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-19 06:58:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-19 06:58:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 06:58:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-19 06:58:04,648 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-19 06:58:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:04,648 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-19 06:58:04,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:58:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-19 06:58:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:04,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:04,655 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] [2020-08-19 06:58:04,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:58:04,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-19 06:58:04,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:04,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165636357] [2020-08-19 06:58:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:04,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165636357] [2020-08-19 06:58:04,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:04,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:58:04,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703538475] [2020-08-19 06:58:04,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:58:04,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:58:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:58:04,856 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-19 06:58:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:05,505 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-19 06:58:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:58:05,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-19 06:58:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:05,510 INFO L225 Difference]: With dead ends: 406 [2020-08-19 06:58:05,510 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 06:58:05,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:58:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 06:58:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-19 06:58:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-19 06:58:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-19 06:58:05,551 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-19 06:58:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:05,552 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-19 06:58:05,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:58:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-19 06:58:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 06:58:05,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:05,555 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] [2020-08-19 06:58:05,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:58:05,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-19 06:58:05,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:05,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872454778] [2020-08-19 06:58:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:58:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:05,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872454778] [2020-08-19 06:58:05,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:05,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 06:58:05,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639230405] [2020-08-19 06:58:05,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:58:05,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:58:05,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:05,800 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-19 06:58:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:07,031 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-19 06:58:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:58:07,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-19 06:58:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:07,036 INFO L225 Difference]: With dead ends: 582 [2020-08-19 06:58:07,037 INFO L226 Difference]: Without dead ends: 417 [2020-08-19 06:58:07,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:58:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-19 06:58:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-19 06:58:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-19 06:58:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-19 06:58:07,104 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-19 06:58:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:07,105 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-19 06:58:07,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:58:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-19 06:58:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 06:58:07,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:07,108 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] [2020-08-19 06:58:07,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:58:07,109 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-19 06:58:07,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:07,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506241936] [2020-08-19 06:58:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:58:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:07,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506241936] [2020-08-19 06:58:07,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:07,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 06:58:07,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265643332] [2020-08-19 06:58:07,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:58:07,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:58:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:58:07,363 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-19 06:58:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:10,207 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-19 06:58:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 06:58:10,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-19 06:58:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:10,216 INFO L225 Difference]: With dead ends: 873 [2020-08-19 06:58:10,216 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 06:58:10,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 06:58:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 06:58:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-19 06:58:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-19 06:58:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-19 06:58:10,294 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-19 06:58:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:10,294 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-19 06:58:10,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:58:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-19 06:58:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:10,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:10,297 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] [2020-08-19 06:58:10,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:58:10,305 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-19 06:58:10,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:10,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923550310] [2020-08-19 06:58:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:10,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923550310] [2020-08-19 06:58:10,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:10,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:58:10,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729135517] [2020-08-19 06:58:10,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:58:10,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:10,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:58:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:58:10,517 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-19 06:58:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:11,684 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-19 06:58:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:58:11,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-19 06:58:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:11,688 INFO L225 Difference]: With dead ends: 612 [2020-08-19 06:58:11,688 INFO L226 Difference]: Without dead ends: 418 [2020-08-19 06:58:11,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:58:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-19 06:58:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-19 06:58:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 06:58:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-19 06:58:11,737 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-19 06:58:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:11,737 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-19 06:58:11,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:58:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-19 06:58:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:11,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:11,740 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] [2020-08-19 06:58:11,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:58:11,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-19 06:58:11,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:11,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671619943] [2020-08-19 06:58:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:11,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671619943] [2020-08-19 06:58:11,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:11,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 06:58:11,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569443282] [2020-08-19 06:58:11,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:58:11,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:58:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:11,927 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-19 06:58:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:12,711 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-19 06:58:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:58:12,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 06:58:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:12,717 INFO L225 Difference]: With dead ends: 727 [2020-08-19 06:58:12,717 INFO L226 Difference]: Without dead ends: 421 [2020-08-19 06:58:12,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:58:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-19 06:58:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-19 06:58:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-19 06:58:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-19 06:58:12,771 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-19 06:58:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:12,772 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-19 06:58:12,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:58:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-19 06:58:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:12,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:12,774 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] [2020-08-19 06:58:12,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:58:12,775 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:12,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-19 06:58:12,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:12,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173739071] [2020-08-19 06:58:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:12,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:13,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173739071] [2020-08-19 06:58:13,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:13,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 06:58:13,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776390436] [2020-08-19 06:58:13,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:58:13,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:58:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:13,009 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-19 06:58:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:15,505 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-19 06:58:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:58:15,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 06:58:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:15,515 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 06:58:15,515 INFO L226 Difference]: Without dead ends: 840 [2020-08-19 06:58:15,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-19 06:58:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-19 06:58:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-19 06:58:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-19 06:58:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-19 06:58:15,618 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-19 06:58:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:15,619 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-19 06:58:15,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:58:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-19 06:58:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:15,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:15,629 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] [2020-08-19 06:58:15,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:58:15,629 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-19 06:58:15,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:15,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654474866] [2020-08-19 06:58:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:15,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654474866] [2020-08-19 06:58:15,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:15,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 06:58:15,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751921851] [2020-08-19 06:58:15,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:58:15,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:58:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:15,819 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-19 06:58:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:16,703 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-19 06:58:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:58:16,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 06:58:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:16,711 INFO L225 Difference]: With dead ends: 1352 [2020-08-19 06:58:16,711 INFO L226 Difference]: Without dead ends: 764 [2020-08-19 06:58:16,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:58:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-19 06:58:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-19 06:58:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-19 06:58:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-19 06:58:16,789 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-19 06:58:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:16,790 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-19 06:58:16,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:58:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-19 06:58:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:58:16,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:16,793 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] [2020-08-19 06:58:16,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:58:16,793 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-19 06:58:16,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:16,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998411535] [2020-08-19 06:58:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:58:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:58:16,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998411535] [2020-08-19 06:58:16,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:16,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:58:16,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087115419] [2020-08-19 06:58:16,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:58:16,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:16,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:58:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:58:16,953 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-19 06:58:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:17,626 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-19 06:58:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:58:17,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-19 06:58:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:17,632 INFO L225 Difference]: With dead ends: 1262 [2020-08-19 06:58:17,632 INFO L226 Difference]: Without dead ends: 814 [2020-08-19 06:58:17,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:58:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-19 06:58:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-19 06:58:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-19 06:58:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-19 06:58:17,722 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-19 06:58:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:17,722 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-19 06:58:17,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:58:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-19 06:58:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 06:58:17,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:17,725 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 06:58:17,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:58:17,726 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-19 06:58:17,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:17,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711590115] [2020-08-19 06:58:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:58:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:58:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:58:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 06:58:17,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711590115] [2020-08-19 06:58:17,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:58:17,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:58:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180576155] [2020-08-19 06:58:17,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:58:17,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:58:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:58:17,922 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-19 06:58:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:20,537 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-19 06:58:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 06:58:20,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-19 06:58:20,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:20,546 INFO L225 Difference]: With dead ends: 2276 [2020-08-19 06:58:20,547 INFO L226 Difference]: Without dead ends: 1165 [2020-08-19 06:58:20,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 06:58:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-19 06:58:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-19 06:58:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-19 06:58:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-19 06:58:20,684 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-19 06:58:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:20,685 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-19 06:58:20,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:58:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-19 06:58:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 06:58:20,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:20,694 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 06:58:20,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:58:20,694 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-19 06:58:20,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:20,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556448938] [2020-08-19 06:58:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 06:58:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:58:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 06:58:20,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556448938] [2020-08-19 06:58:20,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:20,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:58:20,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717251726] [2020-08-19 06:58:20,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:58:20,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:58:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:58:20,884 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-19 06:58:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:21,726 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-19 06:58:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:58:21,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-19 06:58:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:21,735 INFO L225 Difference]: With dead ends: 1198 [2020-08-19 06:58:21,735 INFO L226 Difference]: Without dead ends: 1195 [2020-08-19 06:58:21,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:58:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-19 06:58:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-19 06:58:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-19 06:58:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-19 06:58:21,880 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-19 06:58:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:21,881 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-19 06:58:21,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:58:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-19 06:58:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 06:58:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:21,886 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 06:58:21,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:58:21,886 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-19 06:58:21,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:21,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701956905] [2020-08-19 06:58:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 06:58:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:58:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 06:58:22,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701956905] [2020-08-19 06:58:22,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:58:22,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:58:22,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126653279] [2020-08-19 06:58:22,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:58:22,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:58:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:58:22,167 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-19 06:58:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:24,231 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-19 06:58:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:58:24,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-19 06:58:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:24,248 INFO L225 Difference]: With dead ends: 2245 [2020-08-19 06:58:24,248 INFO L226 Difference]: Without dead ends: 2242 [2020-08-19 06:58:24,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:58:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-19 06:58:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-19 06:58:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-19 06:58:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-19 06:58:24,530 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-19 06:58:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:24,531 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-19 06:58:24,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:58:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-19 06:58:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 06:58:24,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:24,538 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:58:24,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:58:24,538 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-19 06:58:24,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:24,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816393773] [2020-08-19 06:58:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 06:58:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 06:58:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 06:58:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-19 06:58:24,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816393773] [2020-08-19 06:58:24,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:58:24,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:58:24,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383105166] [2020-08-19 06:58:24,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:58:24,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:58:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:58:24,736 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-19 06:58:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:25,467 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-19 06:58:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:58:25,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-19 06:58:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:25,481 INFO L225 Difference]: With dead ends: 3453 [2020-08-19 06:58:25,481 INFO L226 Difference]: Without dead ends: 1708 [2020-08-19 06:58:25,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:58:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-19 06:58:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-19 06:58:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-19 06:58:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-19 06:58:25,755 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-19 06:58:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:25,755 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-19 06:58:25,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:58:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-19 06:58:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-19 06:58:25,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:58:25,762 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-19 06:58:25,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:58:25,763 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:58:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:58:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-19 06:58:25,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:58:25,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825594904] [2020-08-19 06:58:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:58:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:58:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 06:58:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:58:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:58:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:58:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 06:58:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:58:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:58:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:58:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-19 06:58:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 06:58:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:25,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:58:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:58:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-19 06:58:26,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825594904] [2020-08-19 06:58:26,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:58:26,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:58:26,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106609120] [2020-08-19 06:58:26,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:58:26,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:58:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:58:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:58:26,037 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-19 06:58:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:58:27,551 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-19 06:58:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:58:27,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-19 06:58:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:58:27,554 INFO L225 Difference]: With dead ends: 1974 [2020-08-19 06:58:27,554 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:58:27,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:58:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:58:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:58:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:58:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:58:27,567 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-19 06:58:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:58:27,567 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:58:27,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:58:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:58:27,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:58:27,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:58:27,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:58:28,118 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 06:58:28,252 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 06:58:35,964 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 06:58:37,026 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 06:58:38,189 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 06:58:38,470 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-19 06:58:38,585 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 06:58:39,624 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-19 06:58:39,816 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 06:58:41,147 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-19 06:58:41,966 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-19 06:58:42,819 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-19 06:58:43,259 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-19 06:58:44,333 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 06:58:44,458 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-19 06:58:44,605 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 06:58:47,850 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 06:58:48,025 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 06:58:48,591 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-19 06:58:48,972 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-19 06:58:49,297 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 06:58:49,491 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 06:58:53,825 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-19 06:58:53,979 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-19 06:58:56,056 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-19 06:58:57,261 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-19 06:58:58,645 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-19 06:58:58,817 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 06:58:59,935 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-19 06:59:00,168 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1