/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 19:54:38,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:54:38,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:54:38,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:54:38,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:54:38,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:54:38,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:54:38,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:54:38,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:54:38,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:54:38,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:54:38,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:54:38,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:54:38,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:54:38,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:54:38,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:54:38,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:54:38,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:54:38,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:54:38,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:54:38,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:54:38,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:54:38,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:54:38,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:54:38,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:54:38,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:54:38,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:54:38,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:54:38,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:54:38,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:54:38,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:54:38,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:54:38,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:54:38,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:54:38,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:54:38,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:54:38,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:54:38,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:54:38,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:54:38,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:54:38,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:54:38,212 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 [2020-08-21 19:54:38,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:54:38,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:54:38,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:54:38,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:54:38,236 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:54:38,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:54:38,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:54:38,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:54:38,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:54:38,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:54:38,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:54:38,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:54:38,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:54:38,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:54:38,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:54:38,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:54:38,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:54:38,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:54:38,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:54:38,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:54:38,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:54:38,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:54:38,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:54:38,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:54:38,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:54:38,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:54:38,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:54:38,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:54:38,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:54:38,241 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=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:54:38,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:54:38,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:54:38,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:54:38,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:54:38,569 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:54:38,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 19:54:38,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e879ee1/43515507e5dc43678db08cf84c4da0bb/FLAG4762896ef [2020-08-21 19:54:39,137 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:54:39,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 19:54:39,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e879ee1/43515507e5dc43678db08cf84c4da0bb/FLAG4762896ef [2020-08-21 19:54:39,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e879ee1/43515507e5dc43678db08cf84c4da0bb [2020-08-21 19:54:39,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:54:39,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:54:39,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:54:39,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:54:39,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:54:39,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:54:39" (1/1) ... [2020-08-21 19:54:39,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586375c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:39, skipping insertion in model container [2020-08-21 19:54:39,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:54:39" (1/1) ... [2020-08-21 19:54:39,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:54:39,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:54:39,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:54:39,878 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:54:39,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:54:40,013 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:54:40,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40 WrapperNode [2020-08-21 19:54:40,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:54:40,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:54:40,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:54:40,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:54:40,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (1/1) ... [2020-08-21 19:54:40,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:54:40,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:54:40,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:54:40,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:54:40,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (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 [2020-08-21 19:54:40,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 19:54:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 19:54:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 19:54:40,124 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 19:54:40,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:54:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:54:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:54:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 19:54:40,124 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 19:54:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:54:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:54:40,518 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:54:40,519 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 19:54:40,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:54:40 BoogieIcfgContainer [2020-08-21 19:54:40,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:54:40,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:54:40,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:54:40,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:54:40,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:54:39" (1/3) ... [2020-08-21 19:54:40,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d82c0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:54:40, skipping insertion in model container [2020-08-21 19:54:40,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:54:40" (2/3) ... [2020-08-21 19:54:40,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d82c0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:54:40, skipping insertion in model container [2020-08-21 19:54:40,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:54:40" (3/3) ... [2020-08-21 19:54:40,534 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 19:54:40,545 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:54:40,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:54:40,581 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:54:40,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:54:40,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:54:40,605 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:54:40,605 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:54:40,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:54:40,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:54:40,606 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:54:40,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:54:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 19:54:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 19:54:40,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:40,639 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] [2020-08-21 19:54:40,639 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 19:54:40,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:40,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64567040] [2020-08-21 19:54:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 19:54:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:41,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64567040] [2020-08-21 19:54:41,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:41,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:54:41,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544812309] [2020-08-21 19:54:41,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:54:41,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:54:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:54:41,243 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 19:54:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:42,419 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 19:54:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:54:42,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 19:54:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:42,457 INFO L225 Difference]: With dead ends: 356 [2020-08-21 19:54:42,457 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 19:54:42,469 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 [2020-08-21 19:54:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 19:54:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 19:54:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 19:54:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 19:54:42,595 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 19:54:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:42,595 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 19:54:42,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:54:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 19:54:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:42,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:42,601 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] [2020-08-21 19:54:42,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:54:42,602 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 19:54:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:42,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453317633] [2020-08-21 19:54:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:42,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453317633] [2020-08-21 19:54:42,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:42,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:54:42,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957686852] [2020-08-21 19:54:42,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:54:42,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:54:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:54:42,804 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 19:54:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:43,486 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 19:54:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:54:43,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 19:54:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:43,492 INFO L225 Difference]: With dead ends: 406 [2020-08-21 19:54:43,492 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 19:54:43,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:54:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 19:54:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 19:54:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 19:54:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 19:54:43,550 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 19:54:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:43,551 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 19:54:43,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:54:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 19:54:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 19:54:43,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:43,556 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] [2020-08-21 19:54:43,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:54:43,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 19:54:43,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:43,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881598091] [2020-08-21 19:54:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:54:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 19:54:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:43,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881598091] [2020-08-21 19:54:43,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:43,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:54:43,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123689144] [2020-08-21 19:54:43,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:54:43,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:54:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:54:43,811 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 19:54:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:45,162 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 19:54:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 19:54:45,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 19:54:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:45,173 INFO L225 Difference]: With dead ends: 582 [2020-08-21 19:54:45,173 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 19:54:45,175 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 [2020-08-21 19:54:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 19:54:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 19:54:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 19:54:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 19:54:45,254 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 19:54:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:45,256 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 19:54:45,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:54:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 19:54:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 19:54:45,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:45,260 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] [2020-08-21 19:54:45,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:54:45,261 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 19:54:45,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:45,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720575862] [2020-08-21 19:54:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:54:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:54:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:45,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720575862] [2020-08-21 19:54:45,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:45,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 19:54:45,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736360154] [2020-08-21 19:54:45,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:54:45,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:45,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:54:45,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:54:45,574 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 19:54:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:48,623 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 19:54:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 19:54:48,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 19:54:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:48,633 INFO L225 Difference]: With dead ends: 873 [2020-08-21 19:54:48,633 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 19:54:48,638 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 [2020-08-21 19:54:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 19:54:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 19:54:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 19:54:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 19:54:48,682 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 19:54:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:48,682 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 19:54:48,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:54:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 19:54:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:48,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:48,684 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] [2020-08-21 19:54:48,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:54:48,693 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 19:54:48,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:48,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862664600] [2020-08-21 19:54:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:48,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862664600] [2020-08-21 19:54:48,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:48,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:54:48,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103767387] [2020-08-21 19:54:48,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:54:48,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:54:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:54:48,903 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 19:54:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:50,014 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 19:54:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:54:50,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 19:54:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:50,018 INFO L225 Difference]: With dead ends: 612 [2020-08-21 19:54:50,018 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 19:54:50,020 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 [2020-08-21 19:54:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 19:54:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 19:54:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 19:54:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 19:54:50,056 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 19:54:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:50,056 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 19:54:50,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:54:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 19:54:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:50,058 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] [2020-08-21 19:54:50,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:54:50,058 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 19:54:50,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:50,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727627072] [2020-08-21 19:54:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:50,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727627072] [2020-08-21 19:54:50,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:50,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:54:50,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278973203] [2020-08-21 19:54:50,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:54:50,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:54:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:54:50,227 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 19:54:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:51,083 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 19:54:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:54:51,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 19:54:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:51,088 INFO L225 Difference]: With dead ends: 727 [2020-08-21 19:54:51,088 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 19:54:51,090 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 [2020-08-21 19:54:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 19:54:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 19:54:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 19:54:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 19:54:51,129 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 19:54:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:51,129 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 19:54:51,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:54:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 19:54:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:51,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:51,131 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] [2020-08-21 19:54:51,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:54:51,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 19:54:51,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:51,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316033820] [2020-08-21 19:54:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:51,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316033820] [2020-08-21 19:54:51,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:51,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:54:51,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152544257] [2020-08-21 19:54:51,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:54:51,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:54:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:54:51,301 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 19:54:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:54,094 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 19:54:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 19:54:54,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 19:54:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:54,104 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 19:54:54,104 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 19:54:54,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-21 19:54:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 19:54:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 19:54:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 19:54:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 19:54:54,227 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 19:54:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:54,230 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 19:54:54,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:54:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 19:54:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:54,233 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] [2020-08-21 19:54:54,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:54:54,233 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 19:54:54,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:54,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819959816] [2020-08-21 19:54:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:54,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819959816] [2020-08-21 19:54:54,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:54,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 19:54:54,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302456929] [2020-08-21 19:54:54,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:54:54,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:54:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:54:54,506 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 19:54:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:55,418 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 19:54:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:54:55,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 19:54:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:55,427 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 19:54:55,428 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 19:54:55,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:54:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 19:54:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 19:54:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 19:54:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 19:54:55,535 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 19:54:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:55,536 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 19:54:55,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:54:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 19:54:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 19:54:55,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:55,540 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] [2020-08-21 19:54:55,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:54:55,540 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 19:54:55,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:55,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662969340] [2020-08-21 19:54:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 19:54:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:54:55,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662969340] [2020-08-21 19:54:55,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:54:55,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:54:55,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813986798] [2020-08-21 19:54:55,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:54:55,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:54:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:54:55,709 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 19:54:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:56,382 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 19:54:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:54:56,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 19:54:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:56,389 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 19:54:56,389 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 19:54:56,392 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 [2020-08-21 19:54:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 19:54:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 19:54:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 19:54:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 19:54:56,483 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 19:54:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:56,483 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 19:54:56,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:54:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 19:54:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 19:54:56,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:56,487 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] [2020-08-21 19:54:56,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:54:56,487 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 19:54:56,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:56,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966201038] [2020-08-21 19:54:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:54:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:54:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 19:54:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 19:54:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 19:54:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:54:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:54:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 19:54:56,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966201038] [2020-08-21 19:54:56,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:54:56,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:54:56,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770171547] [2020-08-21 19:54:56,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:54:56,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:54:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:54:56,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:54:56,692 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 19:54:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:54:59,630 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 19:54:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 19:54:59,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 19:54:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:54:59,641 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 19:54:59,641 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 19:54:59,651 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 [2020-08-21 19:54:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 19:54:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 19:54:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 19:54:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 19:54:59,825 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 19:54:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:54:59,827 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 19:54:59,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:54:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 19:54:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 19:54:59,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:54:59,832 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] [2020-08-21 19:54:59,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:54:59,832 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:54:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:54:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 19:54:59,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:54:59,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962531898] [2020-08-21 19:54:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:54:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:54:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:54:59,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:54:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:55:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:55:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:55:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 19:55:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 19:55:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 19:55:00,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962531898] [2020-08-21 19:55:00,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:55:00,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:55:00,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597533251] [2020-08-21 19:55:00,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:55:00,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:55:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:55:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:55:00,105 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 19:55:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:55:00,973 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 19:55:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:55:00,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 19:55:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:55:00,983 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 19:55:00,984 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 19:55:00,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:55:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 19:55:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 19:55:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 19:55:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 19:55:01,129 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 19:55:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:55:01,130 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 19:55:01,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:55:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 19:55:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 19:55:01,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:55:01,134 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] [2020-08-21 19:55:01,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:55:01,135 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:55:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:55:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 19:55:01,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:55:01,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809465762] [2020-08-21 19:55:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:55:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:55:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:55:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:55:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:55:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:55:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 19:55:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 19:55:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 19:55:01,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809465762] [2020-08-21 19:55:01,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:55:01,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:55:01,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76809272] [2020-08-21 19:55:01,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:55:01,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:55:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:55:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:55:01,418 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 19:55:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:55:03,637 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 19:55:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 19:55:03,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 19:55:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:55:03,665 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 19:55:03,665 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 19:55:03,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-21 19:55:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 19:55:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 19:55:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 19:55:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 19:55:03,988 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 19:55:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:55:03,989 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 19:55:03,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:55:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 19:55:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 19:55:03,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:55:03,997 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] [2020-08-21 19:55:03,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:55:03,997 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:55:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:55:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 19:55:03,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:55:03,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580090839] [2020-08-21 19:55:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:55:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:55:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:55:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:55:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:55:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:55:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 19:55:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 19:55:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 19:55:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 19:55:04,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580090839] [2020-08-21 19:55:04,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:55:04,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:55:04,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264473884] [2020-08-21 19:55:04,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:55:04,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:55:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:55:04,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:55:04,243 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 19:55:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:55:04,984 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 19:55:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:55:04,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 19:55:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:55:04,998 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 19:55:04,999 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 19:55:05,019 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 [2020-08-21 19:55:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 19:55:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 19:55:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 19:55:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 19:55:05,239 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 19:55:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:55:05,239 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 19:55:05,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:55:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 19:55:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 19:55:05,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:55:05,247 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] [2020-08-21 19:55:05,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:55:05,247 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:55:05,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:55:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 19:55:05,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:55:05,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616091120] [2020-08-21 19:55:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:55:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:55:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:55:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 19:55:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 19:55:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 19:55:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 19:55:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 19:55:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 19:55:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 19:55:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 19:55:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 19:55:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 19:55:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:55:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 19:55:05,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616091120] [2020-08-21 19:55:05,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:55:05,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:55:05,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937899094] [2020-08-21 19:55:05,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:55:05,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:55:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:55:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:55:05,555 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 19:55:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:55:07,142 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 19:55:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 19:55:07,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 19:55:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:55:07,148 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 19:55:07,148 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:55:07,160 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 [2020-08-21 19:55:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:55:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:55:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:55:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:55:07,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 19:55:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:55:07,161 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:55:07,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:55:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:55:07,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:55:07,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:55:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:55:07,828 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 19:55:07,952 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 19:55:15,518 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 19:55:16,598 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 19:55:17,783 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 19:55:18,048 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 19:55:18,161 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 19:55:19,156 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 19:55:19,351 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 19:55:20,691 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 19:55:21,475 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 19:55:22,262 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 19:55:22,655 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 19:55:23,756 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 19:55:23,882 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 19:55:24,026 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 19:55:27,256 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 19:55:27,431 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 19:55:27,979 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 19:55:28,382 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 19:55:28,728 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 19:55:28,935 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 19:55:33,331 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 19:55:33,473 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 19:55:35,479 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 19:55:36,698 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 165 DAG size of output: 101