/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=0.3 -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 05:20:54,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:20:54,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:20:54,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:20:54,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:20:54,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:20:54,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:20:54,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:20:54,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:20:54,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:20:54,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:20:54,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:20:54,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:20:54,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:20:54,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:20:54,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:20:54,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:20:54,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:20:54,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:20:54,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:20:54,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:20:54,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:20:54,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:20:54,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:20:54,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:20:54,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:20:54,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:20:54,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:20:54,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:20:54,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:20:54,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:20:54,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:20:54,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:20:54,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:20:54,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:20:54,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:20:54,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:20:54,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:20:54,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:20:54,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:20:54,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:20:54,855 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 05:20:54,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:20:54,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:20:54,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:20:54,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:20:54,888 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:20:54,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:20:54,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:20:54,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:20:54,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:20:54,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:20:54,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:20:54,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:20:54,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:20:54,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:20:54,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:20:54,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:20:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:20:54,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:20:54,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:20:54,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:20:54,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:20:54,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:20:54,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:20:54,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:20:54,896 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=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:20:55,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:20:55,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:20:55,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:20:55,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:20:55,227 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:20:55,227 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 05:20:55,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb37c8885/b39b61da536a45b6b9b824fff7cdce3e/FLAG8c80d6d7e [2020-08-19 05:20:55,797 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:20:55,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-19 05:20:55,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb37c8885/b39b61da536a45b6b9b824fff7cdce3e/FLAG8c80d6d7e [2020-08-19 05:20:56,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb37c8885/b39b61da536a45b6b9b824fff7cdce3e [2020-08-19 05:20:56,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:20:56,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:20:56,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:20:56,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:20:56,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:20:56,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1571b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56, skipping insertion in model container [2020-08-19 05:20:56,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:20:56,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:20:56,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:20:56,415 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:20:56,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:20:56,465 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:20:56,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56 WrapperNode [2020-08-19 05:20:56,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:20:56,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:20:56,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:20:56,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:20:56,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (1/1) ... [2020-08-19 05:20:56,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:20:56,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:20:56,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:20:56,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:20:56,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (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 05:20:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:20:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:20:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-19 05:20:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-19 05:20:56,669 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-19 05:20:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-19 05:20:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-19 05:20:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-19 05:20:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-19 05:20:56,670 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-19 05:20:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-19 05:20:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-19 05:20:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-19 05:20:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-19 05:20:56,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:20:56,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-19 05:20:56,672 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-19 05:20:56,673 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-19 05:20:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:20:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:20:56,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:20:57,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:20:57,054 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 05:20:57,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:20:57 BoogieIcfgContainer [2020-08-19 05:20:57,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:20:57,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:20:57,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:20:57,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:20:57,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:20:56" (1/3) ... [2020-08-19 05:20:57,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f33f92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:20:57, skipping insertion in model container [2020-08-19 05:20:57,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:20:56" (2/3) ... [2020-08-19 05:20:57,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f33f92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:20:57, skipping insertion in model container [2020-08-19 05:20:57,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:20:57" (3/3) ... [2020-08-19 05:20:57,070 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-19 05:20:57,081 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:20:57,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:20:57,133 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:20:57,162 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:20:57,162 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:20:57,162 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:20:57,163 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:20:57,163 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:20:57,163 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:20:57,163 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:20:57,163 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:20:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-19 05:20:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 05:20:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:20:57,202 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 05:20:57,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:20:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:20:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-19 05:20:57,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:20:57,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284970265] [2020-08-19 05:20:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:20:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:20:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:20:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:20:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:20:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 05:20:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:20:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:20:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:57,742 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 05:20:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284970265] [2020-08-19 05:20:57,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:20:57,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:20:57,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504833947] [2020-08-19 05:20:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:20:57,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:20:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:20:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:20:57,768 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-19 05:20:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:20:58,921 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-19 05:20:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:20:58,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-19 05:20:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:20:58,940 INFO L225 Difference]: With dead ends: 356 [2020-08-19 05:20:58,941 INFO L226 Difference]: Without dead ends: 248 [2020-08-19 05:20:58,946 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 05:20:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-19 05:20:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-19 05:20:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 05:20:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-19 05:20:59,033 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-19 05:20:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:20:59,034 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-19 05:20:59,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:20:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-19 05:20:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:20:59,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:20:59,040 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 05:20:59,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:20:59,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:20:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:20:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-19 05:20:59,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:20:59,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853929996] [2020-08-19 05:20:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:20:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:20:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:20:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:20:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:20:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:20:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:20:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:20:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:20:59,283 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 05:20:59,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853929996] [2020-08-19 05:20:59,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:20:59,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 05:20:59,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896099199] [2020-08-19 05:20:59,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:20:59,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:20:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:20:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:20:59,287 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-19 05:20:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:20:59,925 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-19 05:20:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:20:59,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-19 05:20:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:20:59,930 INFO L225 Difference]: With dead ends: 406 [2020-08-19 05:20:59,930 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 05:20:59,933 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 05:20:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 05:20:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-19 05:20:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-19 05:20:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-19 05:20:59,977 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-19 05:20:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:20:59,977 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-19 05:20:59,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:20:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-19 05:20:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 05:20:59,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:20:59,981 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 05:20:59,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:20:59,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:20:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:20:59,982 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-19 05:20:59,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:20:59,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228917435] [2020-08-19 05:20:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 05:21:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:00,199 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 05:21:00,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228917435] [2020-08-19 05:21:00,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:00,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:21:00,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354844378] [2020-08-19 05:21:00,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:21:00,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:00,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:21:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:21:00,202 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-19 05:21:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:01,538 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-19 05:21:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 05:21:01,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-19 05:21:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:01,548 INFO L225 Difference]: With dead ends: 582 [2020-08-19 05:21:01,548 INFO L226 Difference]: Without dead ends: 417 [2020-08-19 05:21:01,556 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 05:21:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-19 05:21:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-19 05:21:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-19 05:21:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-19 05:21:01,636 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-19 05:21:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:01,637 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-19 05:21:01,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:21:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-19 05:21:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 05:21:01,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:01,640 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 05:21:01,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:21:01,641 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-19 05:21:01,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:01,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245383660] [2020-08-19 05:21:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 05:21:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:01,879 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 05:21:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245383660] [2020-08-19 05:21:01,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:01,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-19 05:21:01,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539117580] [2020-08-19 05:21:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:21:01,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:21:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:21:01,882 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-19 05:21:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:04,888 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-19 05:21:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 05:21:04,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-19 05:21:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:04,897 INFO L225 Difference]: With dead ends: 873 [2020-08-19 05:21:04,897 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 05:21:04,900 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 05:21:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 05:21:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-19 05:21:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-19 05:21:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-19 05:21:04,943 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-19 05:21:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:04,944 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-19 05:21:04,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:21:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-19 05:21:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:21:04,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:04,946 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 05:21:04,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:21:04,946 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:04,947 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-19 05:21:04,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:04,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390606064] [2020-08-19 05:21:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:21:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:05,193 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 05:21:05,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390606064] [2020-08-19 05:21:05,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:05,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 05:21:05,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881450535] [2020-08-19 05:21:05,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:21:05,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:05,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:21:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:21:05,196 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-19 05:21:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:06,420 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-19 05:21:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:21:06,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-19 05:21:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:06,427 INFO L225 Difference]: With dead ends: 612 [2020-08-19 05:21:06,427 INFO L226 Difference]: Without dead ends: 418 [2020-08-19 05:21:06,430 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 05:21:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-19 05:21:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-19 05:21:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-19 05:21:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-19 05:21:06,508 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-19 05:21:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:06,509 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-19 05:21:06,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:21:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-19 05:21:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:21:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:06,511 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 05:21:06,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:21:06,512 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-19 05:21:06,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:06,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848335768] [2020-08-19 05:21:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:21:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:06,709 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 05:21:06,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848335768] [2020-08-19 05:21:06,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:06,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:21:06,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475051890] [2020-08-19 05:21:06,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:21:06,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:06,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:21:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:21:06,716 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-19 05:21:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:07,594 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-19 05:21:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:21:07,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 05:21:07,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:07,600 INFO L225 Difference]: With dead ends: 727 [2020-08-19 05:21:07,601 INFO L226 Difference]: Without dead ends: 421 [2020-08-19 05:21:07,604 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 05:21:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-19 05:21:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-19 05:21:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-19 05:21:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-19 05:21:07,650 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-19 05:21:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:07,652 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-19 05:21:07,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:21:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-19 05:21:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:21:07,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:07,654 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 05:21:07,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:21:07,654 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-19 05:21:07,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:07,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183265851] [2020-08-19 05:21:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:21:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:07,843 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 05:21:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183265851] [2020-08-19 05:21:07,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:07,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:21:07,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846381451] [2020-08-19 05:21:07,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:21:07,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:21:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:21:07,853 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-19 05:21:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:10,582 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-19 05:21:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 05:21:10,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 05:21:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:10,590 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 05:21:10,590 INFO L226 Difference]: Without dead ends: 840 [2020-08-19 05:21:10,594 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 05:21:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-19 05:21:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-19 05:21:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-19 05:21:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-19 05:21:10,672 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-19 05:21:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:10,673 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-19 05:21:10,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:21:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-19 05:21:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:21:10,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:10,675 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 05:21:10,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:21:10,675 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-19 05:21:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:10,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251719975] [2020-08-19 05:21:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:21:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:10,852 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 05:21:10,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251719975] [2020-08-19 05:21:10,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:10,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 05:21:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769134687] [2020-08-19 05:21:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:21:10,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:21:10,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:21:10,855 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-19 05:21:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:11,737 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-19 05:21:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:21:11,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 05:21:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:11,744 INFO L225 Difference]: With dead ends: 1352 [2020-08-19 05:21:11,745 INFO L226 Difference]: Without dead ends: 764 [2020-08-19 05:21:11,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-19 05:21:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-19 05:21:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-19 05:21:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-19 05:21:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-19 05:21:11,817 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-19 05:21:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:11,817 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-19 05:21:11,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:21:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-19 05:21:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 05:21:11,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:11,819 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 05:21:11,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:21:11,819 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-19 05:21:11,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:11,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577393363] [2020-08-19 05:21:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 05:21:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:11,933 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 05:21:11,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577393363] [2020-08-19 05:21:11,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:11,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 05:21:11,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595952621] [2020-08-19 05:21:11,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:21:11,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:21:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:21:11,936 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-19 05:21:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:12,660 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-19 05:21:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:21:12,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-19 05:21:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:12,668 INFO L225 Difference]: With dead ends: 1262 [2020-08-19 05:21:12,668 INFO L226 Difference]: Without dead ends: 814 [2020-08-19 05:21:12,670 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 05:21:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-19 05:21:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-19 05:21:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-19 05:21:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-19 05:21:12,741 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-19 05:21:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:12,742 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-19 05:21:12,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:21:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-19 05:21:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 05:21:12,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:12,744 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 05:21:12,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:21:12,745 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:12,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-19 05:21:12,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:12,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355985856] [2020-08-19 05:21:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 05:21:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 05:21:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 05:21:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:12,920 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 05:21:12,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355985856] [2020-08-19 05:21:12,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:21:12,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:21:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376528282] [2020-08-19 05:21:12,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:21:12,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:21:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:21:12,923 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-19 05:21:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:15,692 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-19 05:21:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 05:21:15,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-19 05:21:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:15,702 INFO L225 Difference]: With dead ends: 2276 [2020-08-19 05:21:15,702 INFO L226 Difference]: Without dead ends: 1165 [2020-08-19 05:21:15,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 05:21:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-19 05:21:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-19 05:21:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-19 05:21:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-19 05:21:15,852 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-19 05:21:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:15,853 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-19 05:21:15,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:21:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-19 05:21:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 05:21:15,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:15,856 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 05:21:15,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:21:15,857 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-19 05:21:15,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:15,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941093001] [2020-08-19 05:21:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:15,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 05:21:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 05:21:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:16,026 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 05:21:16,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941093001] [2020-08-19 05:21:16,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:16,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 05:21:16,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035784705] [2020-08-19 05:21:16,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:21:16,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:21:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:21:16,028 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-19 05:21:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:16,866 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-19 05:21:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:21:16,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-19 05:21:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:16,874 INFO L225 Difference]: With dead ends: 1198 [2020-08-19 05:21:16,875 INFO L226 Difference]: Without dead ends: 1195 [2020-08-19 05:21:16,876 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 05:21:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-19 05:21:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-19 05:21:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-19 05:21:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-19 05:21:16,992 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-19 05:21:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:16,993 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-19 05:21:16,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:21:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-19 05:21:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 05:21:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:16,996 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 05:21:16,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:21:16,996 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-19 05:21:16,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:16,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52568179] [2020-08-19 05:21:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 05:21:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 05:21:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:17,268 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 05:21:17,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52568179] [2020-08-19 05:21:17,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:21:17,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:21:17,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520575886] [2020-08-19 05:21:17,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:21:17,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:17,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:21:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:21:17,271 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-19 05:21:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:19,477 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-19 05:21:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 05:21:19,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-19 05:21:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:19,494 INFO L225 Difference]: With dead ends: 2245 [2020-08-19 05:21:19,494 INFO L226 Difference]: Without dead ends: 2242 [2020-08-19 05:21:19,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-19 05:21:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-19 05:21:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-19 05:21:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-19 05:21:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-19 05:21:19,783 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-19 05:21:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:19,783 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-19 05:21:19,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:21:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-19 05:21:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-19 05:21:19,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:19,792 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 05:21:19,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:21:19,793 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-19 05:21:19,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:19,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839077954] [2020-08-19 05:21:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 05:21:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 05:21:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 05:21:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:19,982 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 05:21:19,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839077954] [2020-08-19 05:21:19,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:21:19,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 05:21:19,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458427212] [2020-08-19 05:21:19,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:21:19,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:21:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:21:19,985 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-19 05:21:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:20,775 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-19 05:21:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:21:20,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-19 05:21:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:20,788 INFO L225 Difference]: With dead ends: 3453 [2020-08-19 05:21:20,788 INFO L226 Difference]: Without dead ends: 1708 [2020-08-19 05:21:20,804 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 05:21:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-19 05:21:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-19 05:21:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-19 05:21:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-19 05:21:21,050 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-19 05:21:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:21,050 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-19 05:21:21,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:21:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-19 05:21:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-19 05:21:21,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:21:21,057 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 05:21:21,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:21:21,058 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:21:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:21:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-19 05:21:21,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:21:21,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219875775] [2020-08-19 05:21:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:21:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:21:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 05:21:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 05:21:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 05:21:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 05:21:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-19 05:21:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 05:21:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 05:21:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 05:21:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-19 05:21:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 05:21:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 05:21:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:21:21,329 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 05:21:21,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219875775] [2020-08-19 05:21:21,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:21:21,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 05:21:21,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081994758] [2020-08-19 05:21:21,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 05:21:21,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:21:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 05:21:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-19 05:21:21,332 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-19 05:21:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:21:23,001 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-19 05:21:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 05:21:23,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-19 05:21:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:21:23,006 INFO L225 Difference]: With dead ends: 1974 [2020-08-19 05:21:23,006 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:21:23,017 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 05:21:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:21:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:21:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:21:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:21:23,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-19 05:21:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:21:23,019 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:21:23,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 05:21:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:21:23,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:21:23,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:21:23,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:21:23,514 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 05:21:23,627 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-19 05:21:30,869 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 05:21:31,989 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 05:21:32,099 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-08-19 05:21:33,179 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 05:21:33,454 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-19 05:21:33,569 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 05:21:34,580 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-19 05:21:34,781 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 05:21:36,108 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-19 05:21:36,936 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-19 05:21:37,739 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-19 05:21:38,134 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-19 05:21:39,220 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-19 05:21:39,361 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-19 05:21:39,541 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-19 05:21:42,886 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-19 05:21:43,057 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-19 05:21:43,619 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-19 05:21:44,033 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-19 05:21:44,380 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 05:21:44,596 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-19 05:21:49,123 WARN L193 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-19 05:21:49,273 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-19 05:21:51,396 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-19 05:21:52,631 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-19 05:21:54,062 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-19 05:21:54,236 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46