/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b [2020-09-24 15:09:54,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:09:54,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:09:54,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:09:54,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:09:54,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:09:54,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:09:54,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:09:54,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:09:54,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:09:54,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:09:54,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:09:54,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:09:54,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:09:54,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:09:54,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:09:54,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:09:54,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:09:54,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:09:54,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:09:54,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:09:54,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:09:54,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:09:54,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:09:54,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:09:54,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:09:54,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:09:54,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:09:54,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:09:54,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:09:54,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:09:54,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:09:54,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:09:54,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:09:54,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:09:54,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:09:54,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:09:54,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:09:54,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:09:54,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:09:54,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:09:54,168 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 [2020-09-24 15:09:54,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:09:54,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:09:54,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:09:54,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:09:54,209 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:09:54,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:09:54,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:09:54,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:09:54,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:09:54,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:09:54,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:09:54,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:09:54,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:09:54,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:09:54,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:09:54,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:09:54,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:09:54,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:09:54,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:09:54,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:09:54,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:09:54,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:09:54,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:09:54,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:09:54,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:09:54,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:09:54,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:09:54,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:09:54,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:09:54,217 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:09:54,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:09:54,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:09:54,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:09:54,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:09:54,687 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:09:54,688 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-09-24 15:09:54,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8cdb526/d22464be7d8640cdac2fcd8e49e5dc66/FLAG88d448819 [2020-09-24 15:09:55,320 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:09:55,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-09-24 15:09:55,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8cdb526/d22464be7d8640cdac2fcd8e49e5dc66/FLAG88d448819 [2020-09-24 15:09:55,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8cdb526/d22464be7d8640cdac2fcd8e49e5dc66 [2020-09-24 15:09:55,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:09:55,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:09:55,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:55,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:09:55,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:09:55,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:55" (1/1) ... [2020-09-24 15:09:55,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:55, skipping insertion in model container [2020-09-24 15:09:55,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:09:55" (1/1) ... [2020-09-24 15:09:55,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:09:55,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:09:56,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:56,011 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:09:56,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:09:56,156 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:09:56,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56 WrapperNode [2020-09-24 15:09:56,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:09:56,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:09:56,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:09:56,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:09:56,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... [2020-09-24 15:09:56,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:09:56,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:09:56,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:09:56,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:09:56,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:09:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:09:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:09:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-09-24 15:09:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-09-24 15:09:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-09-24 15:09:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-09-24 15:09:56,287 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-09-24 15:09:56,288 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-09-24 15:09:56,288 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-09-24 15:09:56,288 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-09-24 15:09:56,288 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-24 15:09:56,288 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-09-24 15:09:56,289 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-09-24 15:09:56,289 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-09-24 15:09:56,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:09:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:09:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:09:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-09-24 15:09:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-09-24 15:09:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-09-24 15:09:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-09-24 15:09:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-09-24 15:09:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-09-24 15:09:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-09-24 15:09:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-09-24 15:09:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:09:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:09:56,778 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:09:56,778 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 15:09:56,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:56 BoogieIcfgContainer [2020-09-24 15:09:56,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:09:56,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:09:56,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:09:56,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:09:56,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:09:55" (1/3) ... [2020-09-24 15:09:56,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7226f15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:56, skipping insertion in model container [2020-09-24 15:09:56,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:09:56" (2/3) ... [2020-09-24 15:09:56,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7226f15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:09:56, skipping insertion in model container [2020-09-24 15:09:56,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:09:56" (3/3) ... [2020-09-24 15:09:56,795 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-09-24 15:09:56,805 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:09:56,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:09:56,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:09:56,869 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:09:56,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:09:56,870 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:09:56,870 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:09:56,870 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:09:56,870 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:09:56,870 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:09:56,871 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:09:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states. [2020-09-24 15:09:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 15:09:56,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:56,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:56,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1485288606, now seen corresponding path program 1 times [2020-09-24 15:09:56,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:56,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730343235] [2020-09-24 15:09:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:09:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:09:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:09:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 15:09:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:09:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:09:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:57,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730343235] [2020-09-24 15:09:57,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:09:57,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:09:57,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792849989] [2020-09-24 15:09:57,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:09:57,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:09:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:09:57,573 INFO L87 Difference]: Start difference. First operand 182 states. Second operand 6 states. [2020-09-24 15:09:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:09:58,867 INFO L93 Difference]: Finished difference Result 573 states and 771 transitions. [2020-09-24 15:09:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:09:58,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-09-24 15:09:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:09:58,891 INFO L225 Difference]: With dead ends: 573 [2020-09-24 15:09:58,892 INFO L226 Difference]: Without dead ends: 416 [2020-09-24 15:09:58,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:09:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-09-24 15:09:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 305. [2020-09-24 15:09:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 15:09:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 366 transitions. [2020-09-24 15:09:59,013 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 366 transitions. Word has length 109 [2020-09-24 15:09:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:09:59,014 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 366 transitions. [2020-09-24 15:09:59,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:09:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 366 transitions. [2020-09-24 15:09:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 15:09:59,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:09:59,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:09:59,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:09:59,022 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:09:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:09:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash -388258462, now seen corresponding path program 1 times [2020-09-24 15:09:59,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:09:59,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405482645] [2020-09-24 15:09:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:09:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:09:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:09:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:09:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:09:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:09:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:09:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:09:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:09:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:09:59,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405482645] [2020-09-24 15:09:59,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:09:59,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:09:59,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896809605] [2020-09-24 15:09:59,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:09:59,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:09:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:09:59,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:09:59,254 INFO L87 Difference]: Start difference. First operand 305 states and 366 transitions. Second operand 7 states. [2020-09-24 15:10:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:00,429 INFO L93 Difference]: Finished difference Result 663 states and 819 transitions. [2020-09-24 15:10:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:10:00,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-09-24 15:10:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:00,439 INFO L225 Difference]: With dead ends: 663 [2020-09-24 15:10:00,441 INFO L226 Difference]: Without dead ends: 402 [2020-09-24 15:10:00,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:10:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-09-24 15:10:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 299. [2020-09-24 15:10:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-09-24 15:10:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 358 transitions. [2020-09-24 15:10:00,502 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 358 transitions. Word has length 110 [2020-09-24 15:10:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:00,503 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 358 transitions. [2020-09-24 15:10:00,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:10:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 358 transitions. [2020-09-24 15:10:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-24 15:10:00,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:00,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:00,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:10:00,507 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1991457360, now seen corresponding path program 1 times [2020-09-24 15:10:00,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:00,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377767474] [2020-09-24 15:10:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:10:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:10:00,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377767474] [2020-09-24 15:10:00,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:00,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:10:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018930112] [2020-09-24 15:10:00,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:10:00,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:10:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:10:00,869 INFO L87 Difference]: Start difference. First operand 299 states and 358 transitions. Second operand 10 states. [2020-09-24 15:10:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:05,301 INFO L93 Difference]: Finished difference Result 1647 states and 2291 transitions. [2020-09-24 15:10:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 15:10:05,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2020-09-24 15:10:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:05,317 INFO L225 Difference]: With dead ends: 1647 [2020-09-24 15:10:05,317 INFO L226 Difference]: Without dead ends: 1392 [2020-09-24 15:10:05,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=431, Invalid=1921, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 15:10:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-09-24 15:10:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1109. [2020-09-24 15:10:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-09-24 15:10:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1511 transitions. [2020-09-24 15:10:05,461 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1511 transitions. Word has length 122 [2020-09-24 15:10:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:05,462 INFO L479 AbstractCegarLoop]: Abstraction has 1109 states and 1511 transitions. [2020-09-24 15:10:05,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:10:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1511 transitions. [2020-09-24 15:10:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 15:10:05,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:05,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:05,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:10:05,466 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 892872046, now seen corresponding path program 1 times [2020-09-24 15:10:05,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:05,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829260474] [2020-09-24 15:10:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 15:10:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:10:05,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829260474] [2020-09-24 15:10:05,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:05,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:10:05,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819586028] [2020-09-24 15:10:05,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:10:05,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:10:05,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:10:05,729 INFO L87 Difference]: Start difference. First operand 1109 states and 1511 transitions. Second operand 7 states. [2020-09-24 15:10:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:07,671 INFO L93 Difference]: Finished difference Result 3817 states and 5757 transitions. [2020-09-24 15:10:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:10:07,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-09-24 15:10:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:07,696 INFO L225 Difference]: With dead ends: 3817 [2020-09-24 15:10:07,696 INFO L226 Difference]: Without dead ends: 2752 [2020-09-24 15:10:07,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:10:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2020-09-24 15:10:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2294. [2020-09-24 15:10:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2294 states. [2020-09-24 15:10:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 3263 transitions. [2020-09-24 15:10:07,997 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 3263 transitions. Word has length 113 [2020-09-24 15:10:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:07,999 INFO L479 AbstractCegarLoop]: Abstraction has 2294 states and 3263 transitions. [2020-09-24 15:10:08,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:10:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 3263 transitions. [2020-09-24 15:10:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 15:10:08,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:08,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:08,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:10:08,007 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1124522967, now seen corresponding path program 1 times [2020-09-24 15:10:08,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:08,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386517437] [2020-09-24 15:10:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 15:10:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 15:10:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:10:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 15:10:08,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386517437] [2020-09-24 15:10:08,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:08,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:10:08,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604277444] [2020-09-24 15:10:08,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:10:08,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:10:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:10:08,346 INFO L87 Difference]: Start difference. First operand 2294 states and 3263 transitions. Second operand 7 states. [2020-09-24 15:10:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:09,648 INFO L93 Difference]: Finished difference Result 5863 states and 9441 transitions. [2020-09-24 15:10:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:10:09,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-09-24 15:10:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:09,682 INFO L225 Difference]: With dead ends: 5863 [2020-09-24 15:10:09,683 INFO L226 Difference]: Without dead ends: 3613 [2020-09-24 15:10:09,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:10:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2020-09-24 15:10:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3285. [2020-09-24 15:10:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3285 states. [2020-09-24 15:10:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 5072 transitions. [2020-09-24 15:10:09,997 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 5072 transitions. Word has length 146 [2020-09-24 15:10:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:09,998 INFO L479 AbstractCegarLoop]: Abstraction has 3285 states and 5072 transitions. [2020-09-24 15:10:09,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:10:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 5072 transitions. [2020-09-24 15:10:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 15:10:10,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:10,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:10,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:10:10,008 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2130517064, now seen corresponding path program 1 times [2020-09-24 15:10:10,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:10,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680142316] [2020-09-24 15:10:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 15:10:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:10:10,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680142316] [2020-09-24 15:10:10,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:10,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:10:10,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368405909] [2020-09-24 15:10:10,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:10:10,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:10:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:10:10,305 INFO L87 Difference]: Start difference. First operand 3285 states and 5072 transitions. Second operand 8 states. [2020-09-24 15:10:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:11,808 INFO L93 Difference]: Finished difference Result 5584 states and 8949 transitions. [2020-09-24 15:10:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:10:11,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 159 [2020-09-24 15:10:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:11,826 INFO L225 Difference]: With dead ends: 5584 [2020-09-24 15:10:11,826 INFO L226 Difference]: Without dead ends: 2448 [2020-09-24 15:10:11,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:10:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2020-09-24 15:10:12,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2104. [2020-09-24 15:10:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2104 states. [2020-09-24 15:10:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2686 transitions. [2020-09-24 15:10:12,038 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2686 transitions. Word has length 159 [2020-09-24 15:10:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:12,039 INFO L479 AbstractCegarLoop]: Abstraction has 2104 states and 2686 transitions. [2020-09-24 15:10:12,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:10:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2686 transitions. [2020-09-24 15:10:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 15:10:12,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:12,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:12,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:10:12,046 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash 136608560, now seen corresponding path program 1 times [2020-09-24 15:10:12,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:12,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069655990] [2020-09-24 15:10:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 15:10:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 15:10:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:10:12,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069655990] [2020-09-24 15:10:12,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:12,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:10:12,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676793810] [2020-09-24 15:10:12,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:10:12,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:10:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:10:12,364 INFO L87 Difference]: Start difference. First operand 2104 states and 2686 transitions. Second operand 10 states. [2020-09-24 15:10:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:13,820 INFO L93 Difference]: Finished difference Result 4243 states and 5814 transitions. [2020-09-24 15:10:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:10:13,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 160 [2020-09-24 15:10:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:13,839 INFO L225 Difference]: With dead ends: 4243 [2020-09-24 15:10:13,839 INFO L226 Difference]: Without dead ends: 2618 [2020-09-24 15:10:13,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:10:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2020-09-24 15:10:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2188. [2020-09-24 15:10:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-24 15:10:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2770 transitions. [2020-09-24 15:10:13,984 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2770 transitions. Word has length 160 [2020-09-24 15:10:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:13,985 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2770 transitions. [2020-09-24 15:10:13,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:10:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2770 transitions. [2020-09-24 15:10:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 15:10:13,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:13,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:13,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:10:13,992 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 651313811, now seen corresponding path program 1 times [2020-09-24 15:10:13,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:13,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787030723] [2020-09-24 15:10:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 15:10:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 15:10:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:10:14,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787030723] [2020-09-24 15:10:14,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:14,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:10:14,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12027117] [2020-09-24 15:10:14,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:10:14,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:10:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:10:14,260 INFO L87 Difference]: Start difference. First operand 2188 states and 2770 transitions. Second operand 8 states. [2020-09-24 15:10:15,229 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-09-24 15:10:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:16,652 INFO L93 Difference]: Finished difference Result 6557 states and 9807 transitions. [2020-09-24 15:10:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:10:16,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 160 [2020-09-24 15:10:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:16,686 INFO L225 Difference]: With dead ends: 6557 [2020-09-24 15:10:16,686 INFO L226 Difference]: Without dead ends: 4848 [2020-09-24 15:10:16,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:10:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2020-09-24 15:10:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4321. [2020-09-24 15:10:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4321 states. [2020-09-24 15:10:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 6072 transitions. [2020-09-24 15:10:17,055 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 6072 transitions. Word has length 160 [2020-09-24 15:10:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:17,056 INFO L479 AbstractCegarLoop]: Abstraction has 4321 states and 6072 transitions. [2020-09-24 15:10:17,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:10:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 6072 transitions. [2020-09-24 15:10:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 15:10:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:17,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:17,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:10:17,061 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash 709880479, now seen corresponding path program 1 times [2020-09-24 15:10:17,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:17,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280538522] [2020-09-24 15:10:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 15:10:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 15:10:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-24 15:10:17,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280538522] [2020-09-24 15:10:17,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:17,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:10:17,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287180344] [2020-09-24 15:10:17,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:10:17,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:17,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:10:17,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:10:17,431 INFO L87 Difference]: Start difference. First operand 4321 states and 6072 transitions. Second operand 9 states. [2020-09-24 15:10:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:19,685 INFO L93 Difference]: Finished difference Result 4787 states and 6809 transitions. [2020-09-24 15:10:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:10:19,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 161 [2020-09-24 15:10:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:19,712 INFO L225 Difference]: With dead ends: 4787 [2020-09-24 15:10:19,712 INFO L226 Difference]: Without dead ends: 4784 [2020-09-24 15:10:19,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:10:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4784 states. [2020-09-24 15:10:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4784 to 4396. [2020-09-24 15:10:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4396 states. [2020-09-24 15:10:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4396 states to 4396 states and 6214 transitions. [2020-09-24 15:10:19,988 INFO L78 Accepts]: Start accepts. Automaton has 4396 states and 6214 transitions. Word has length 161 [2020-09-24 15:10:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:19,989 INFO L479 AbstractCegarLoop]: Abstraction has 4396 states and 6214 transitions. [2020-09-24 15:10:19,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:10:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4396 states and 6214 transitions. [2020-09-24 15:10:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-24 15:10:19,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:19,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:19,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:10:19,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:19,995 INFO L82 PathProgramCache]: Analyzing trace with hash 531148203, now seen corresponding path program 1 times [2020-09-24 15:10:19,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:19,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106684032] [2020-09-24 15:10:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 15:10:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 15:10:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-24 15:10:20,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106684032] [2020-09-24 15:10:20,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:10:20,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:10:20,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788952403] [2020-09-24 15:10:20,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:10:20,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:10:20,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:10:20,466 INFO L87 Difference]: Start difference. First operand 4396 states and 6214 transitions. Second operand 11 states. [2020-09-24 15:10:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:23,869 INFO L93 Difference]: Finished difference Result 8608 states and 14479 transitions. [2020-09-24 15:10:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 15:10:23,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 162 [2020-09-24 15:10:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:23,926 INFO L225 Difference]: With dead ends: 8608 [2020-09-24 15:10:23,927 INFO L226 Difference]: Without dead ends: 8605 [2020-09-24 15:10:23,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 15:10:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2020-09-24 15:10:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7355. [2020-09-24 15:10:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7355 states. [2020-09-24 15:10:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7355 states to 7355 states and 12120 transitions. [2020-09-24 15:10:24,634 INFO L78 Accepts]: Start accepts. Automaton has 7355 states and 12120 transitions. Word has length 162 [2020-09-24 15:10:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:24,635 INFO L479 AbstractCegarLoop]: Abstraction has 7355 states and 12120 transitions. [2020-09-24 15:10:24,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:10:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7355 states and 12120 transitions. [2020-09-24 15:10:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 15:10:24,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:24,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:24,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:10:24,648 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -231404377, now seen corresponding path program 1 times [2020-09-24 15:10:24,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:24,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793316590] [2020-09-24 15:10:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 15:10:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-24 15:10:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 15:10:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-24 15:10:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793316590] [2020-09-24 15:10:24,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:24,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:10:24,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381924210] [2020-09-24 15:10:24,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:10:24,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:10:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:10:24,912 INFO L87 Difference]: Start difference. First operand 7355 states and 12120 transitions. Second operand 8 states. [2020-09-24 15:10:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:26,144 INFO L93 Difference]: Finished difference Result 12979 states and 21040 transitions. [2020-09-24 15:10:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:10:26,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-09-24 15:10:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:26,177 INFO L225 Difference]: With dead ends: 12979 [2020-09-24 15:10:26,177 INFO L226 Difference]: Without dead ends: 6938 [2020-09-24 15:10:26,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:10:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2020-09-24 15:10:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 6688. [2020-09-24 15:10:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6688 states. [2020-09-24 15:10:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6688 states to 6688 states and 11023 transitions. [2020-09-24 15:10:26,663 INFO L78 Accepts]: Start accepts. Automaton has 6688 states and 11023 transitions. Word has length 200 [2020-09-24 15:10:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:26,663 INFO L479 AbstractCegarLoop]: Abstraction has 6688 states and 11023 transitions. [2020-09-24 15:10:26,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:10:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6688 states and 11023 transitions. [2020-09-24 15:10:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-24 15:10:26,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:26,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:26,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:10:26,674 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:26,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2057564385, now seen corresponding path program 1 times [2020-09-24 15:10:26,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:26,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789881917] [2020-09-24 15:10:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 15:10:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 15:10:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 15:10:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 15:10:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-24 15:10:26,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789881917] [2020-09-24 15:10:26,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:10:26,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:10:26,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991736754] [2020-09-24 15:10:26,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:10:26,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:10:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:10:26,910 INFO L87 Difference]: Start difference. First operand 6688 states and 11023 transitions. Second operand 7 states. [2020-09-24 15:10:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:28,184 INFO L93 Difference]: Finished difference Result 10617 states and 18265 transitions. [2020-09-24 15:10:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:10:28,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2020-09-24 15:10:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:28,205 INFO L225 Difference]: With dead ends: 10617 [2020-09-24 15:10:28,205 INFO L226 Difference]: Without dead ends: 4632 [2020-09-24 15:10:28,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:10:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2020-09-24 15:10:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 4216. [2020-09-24 15:10:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4216 states. [2020-09-24 15:10:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 6272 transitions. [2020-09-24 15:10:28,529 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 6272 transitions. Word has length 217 [2020-09-24 15:10:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:28,530 INFO L479 AbstractCegarLoop]: Abstraction has 4216 states and 6272 transitions. [2020-09-24 15:10:28,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:10:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 6272 transitions. [2020-09-24 15:10:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-24 15:10:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:10:28,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:10:28,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:10:28,540 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:10:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:10:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1766348611, now seen corresponding path program 1 times [2020-09-24 15:10:28,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:10:28,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321356339] [2020-09-24 15:10:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:10:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:10:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 15:10:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:10:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 15:10:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:10:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 15:10:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 15:10:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:10:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-24 15:10:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 15:10:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 15:10:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-09-24 15:10:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 15:10:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 15:10:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:10:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-09-24 15:10:28,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321356339] [2020-09-24 15:10:28,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:10:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:10:28,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120070135] [2020-09-24 15:10:28,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:10:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:10:28,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:10:28,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:10:28,799 INFO L87 Difference]: Start difference. First operand 4216 states and 6272 transitions. Second operand 8 states. [2020-09-24 15:10:29,562 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-09-24 15:10:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:10:30,262 INFO L93 Difference]: Finished difference Result 4974 states and 7364 transitions. [2020-09-24 15:10:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:10:30,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 226 [2020-09-24 15:10:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:10:30,266 INFO L225 Difference]: With dead ends: 4974 [2020-09-24 15:10:30,266 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:10:30,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:10:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:10:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:10:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:10:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:10:30,329 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 226 [2020-09-24 15:10:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:10:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:10:30,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:10:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:10:30,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:10:30,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:10:30,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:10:31,147 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-09-24 15:10:31,294 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-09-24 15:10:31,442 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 15:10:31,628 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 15:10:31,785 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 15:10:33,643 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-09-24 15:10:34,396 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2020-09-24 15:10:34,532 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 15:10:35,453 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-09-24 15:10:35,888 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2020-09-24 15:10:37,934 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-09-24 15:10:40,624 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2020-09-24 15:10:41,145 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2020-09-24 15:10:42,580 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 91 [2020-09-24 15:10:43,142 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 93 [2020-09-24 15:10:43,742 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 95 [2020-09-24 15:10:44,516 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 117 [2020-09-24 15:10:45,110 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 93 [2020-09-24 15:10:45,768 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 95