/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 true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:22:41,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:22:41,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:22:41,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:22:41,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:22:41,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:22:41,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:22:41,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:22:41,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:22:41,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:22:41,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:22:41,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:22:41,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:22:41,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:22:41,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:22:41,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:22:41,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:22:41,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:22:41,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:22:41,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:22:41,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:22:41,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:22:41,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:22:41,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:22:41,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:22:41,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:22:41,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:22:41,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:22:41,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:22:41,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:22:41,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:22:41,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:22:41,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:22:41,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:22:41,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:22:41,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:22:41,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:22:41,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:22:41,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:22:41,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:22:41,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:22:41,153 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 20:22:41,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:22:41,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:22:41,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:22:41,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:22:41,208 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:22:41,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:22:41,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:22:41,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:22:41,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:22:41,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:22:41,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:22:41,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:22:41,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:22:41,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:22:41,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:22:41,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:22:41,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:22:41,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:22:41,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:22:41,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:22:41,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:22:41,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:22:41,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:22:41,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:22:41,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:22:41,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:22:41,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:22:41,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:22:41,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:22:41,214 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:22:41,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:22:41,722 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:22:41,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:22:41,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:22:41,730 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:22:41,731 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 20:22:41,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69dffb45f/44bc045d933d40b4aa4c271683bdee59/FLAGfbf92e82e [2020-09-24 20:22:42,371 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:22:42,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 20:22:42,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69dffb45f/44bc045d933d40b4aa4c271683bdee59/FLAGfbf92e82e [2020-09-24 20:22:42,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69dffb45f/44bc045d933d40b4aa4c271683bdee59 [2020-09-24 20:22:42,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:22:42,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:22:42,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:42,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:22:42,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:22:42,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:42" (1/1) ... [2020-09-24 20:22:42,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac3c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:42, skipping insertion in model container [2020-09-24 20:22:42,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:22:42" (1/1) ... [2020-09-24 20:22:42,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:22:42,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:22:43,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:43,104 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:22:43,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:22:43,264 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:22:43,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43 WrapperNode [2020-09-24 20:22:43,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:22:43,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:22:43,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:22:43,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:22:43,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (1/1) ... [2020-09-24 20:22:43,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:22:43,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:22:43,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:22:43,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:22:43,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (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 20:22:43,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:22:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:22:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:22:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 20:22:43,409 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 20:22:43,410 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 20:22:43,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:22:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:22:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:22:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 20:22:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:22:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 20:22:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 20:22:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 20:22:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:22:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:22:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:22:43,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:22:43,983 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 20:22:43,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:43 BoogieIcfgContainer [2020-09-24 20:22:43,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:22:43,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:22:43,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:22:43,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:22:43,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:22:42" (1/3) ... [2020-09-24 20:22:43,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f6cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:43, skipping insertion in model container [2020-09-24 20:22:43,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:22:43" (2/3) ... [2020-09-24 20:22:43,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f6cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:22:43, skipping insertion in model container [2020-09-24 20:22:43,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:22:43" (3/3) ... [2020-09-24 20:22:44,002 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-09-24 20:22:44,014 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:22:44,025 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:22:44,048 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:22:44,082 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:22:44,082 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:22:44,082 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:22:44,083 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:22:44,083 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:22:44,083 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:22:44,083 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:22:44,083 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:22:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-09-24 20:22:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 20:22:44,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:44,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:44,125 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:44,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1377121462, now seen corresponding path program 1 times [2020-09-24 20:22:44,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:44,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657625233] [2020-09-24 20:22:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:46,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:46,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 20:22:46,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:22:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2586 [2020-09-24 20:22:46,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:22:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 20:22:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 20:22:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:22:47,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:47,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:47,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:47,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:47,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:22:47,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:47,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:47,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:47,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:47,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:22:47,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:47,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:47,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:47,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:47,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:47,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 20:22:47,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:47,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:47,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 20:22:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:47,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:47,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:47,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:47,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:22:47,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:22:47,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 20:22:47,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657625233] [2020-09-24 20:22:47,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:22:47,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 20:22:47,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784379103] [2020-09-24 20:22:47,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:22:47,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:22:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:22:47,531 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 15 states. [2020-09-24 20:22:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:48,093 INFO L93 Difference]: Finished difference Result 281 states and 357 transitions. [2020-09-24 20:22:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 20:22:48,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-09-24 20:22:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:48,114 INFO L225 Difference]: With dead ends: 281 [2020-09-24 20:22:48,114 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 20:22:48,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:22:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 20:22:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-09-24 20:22:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 20:22:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-09-24 20:22:48,188 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 81 [2020-09-24 20:22:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:48,189 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-09-24 20:22:48,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:22:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-09-24 20:22:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 20:22:48,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:48,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:22:48,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:22:48,197 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:48,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1823732666, now seen corresponding path program 1 times [2020-09-24 20:22:48,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:48,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734983700] [2020-09-24 20:22:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:49,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:49,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:22:49,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:22:49,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-09-24 20:22:49,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:22:49,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 20:22:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 20:22:49,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:49,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:49,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:49,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:49,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:49,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:49,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:49,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:49,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:49,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:49,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:49,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:49,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:49,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:22:49,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:49,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:49,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:49,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:49,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:49,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:49,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:49,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:49,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:49,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:22:49,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:49,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:49,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 20:22:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:49,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:49,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:22:49,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 20:22:49,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:49,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:22:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 20:22:49,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734983700] [2020-09-24 20:22:49,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:49,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:22:49,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357885130] [2020-09-24 20:22:49,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:22:49,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:22:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:22:49,465 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 13 states. [2020-09-24 20:22:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:49,834 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-09-24 20:22:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:22:49,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-09-24 20:22:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:49,838 INFO L225 Difference]: With dead ends: 277 [2020-09-24 20:22:49,838 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 20:22:49,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:22:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 20:22:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 191. [2020-09-24 20:22:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-09-24 20:22:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 224 transitions. [2020-09-24 20:22:49,885 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 224 transitions. Word has length 85 [2020-09-24 20:22:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:49,887 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 224 transitions. [2020-09-24 20:22:49,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:22:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 224 transitions. [2020-09-24 20:22:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 20:22:49,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:49,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:22:49,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:22:49,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 646909882, now seen corresponding path program 2 times [2020-09-24 20:22:49,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:49,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937674809] [2020-09-24 20:22:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:49,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:50,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:50,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:22:50,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:22:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-09-24 20:22:50,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:22:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-24 20:22:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 20:22:50,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:51,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:51,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:51,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:51,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:22:51,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:51,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:51,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:51,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:22:51,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 20:22:51,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 20:22:51,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 20:22:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:51,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:22:51,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:51,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:22:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 20:22:51,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937674809] [2020-09-24 20:22:51,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:51,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 20:22:51,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016709849] [2020-09-24 20:22:51,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 20:22:51,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 20:22:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:22:51,199 INFO L87 Difference]: Start difference. First operand 191 states and 224 transitions. Second operand 17 states. [2020-09-24 20:22:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:51,652 INFO L93 Difference]: Finished difference Result 299 states and 354 transitions. [2020-09-24 20:22:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:22:51,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-09-24 20:22:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:51,656 INFO L225 Difference]: With dead ends: 299 [2020-09-24 20:22:51,656 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 20:22:51,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:22:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 20:22:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2020-09-24 20:22:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-24 20:22:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2020-09-24 20:22:51,702 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 85 [2020-09-24 20:22:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:51,704 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2020-09-24 20:22:51,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 20:22:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2020-09-24 20:22:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 20:22:51,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:51,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:51,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:22:51,715 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash -955036012, now seen corresponding path program 1 times [2020-09-24 20:22:51,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:51,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886769087] [2020-09-24 20:22:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:51,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:51,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:51,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 20:22:51,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:51,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-09-24 20:22:51,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:22:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 20:22:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 20:22:51,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:52,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:52,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:52,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:52,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:52,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:22:52,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 20:22:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 20:22:52,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 20:22:52,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:22:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:22:52,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 20:22:52,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886769087] [2020-09-24 20:22:52,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:52,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:22:52,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387562511] [2020-09-24 20:22:52,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:22:52,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:22:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:22:52,152 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand 9 states. [2020-09-24 20:22:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:52,325 INFO L93 Difference]: Finished difference Result 358 states and 417 transitions. [2020-09-24 20:22:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:22:52,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-09-24 20:22:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:52,329 INFO L225 Difference]: With dead ends: 358 [2020-09-24 20:22:52,329 INFO L226 Difference]: Without dead ends: 299 [2020-09-24 20:22:52,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:22:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-24 20:22:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274. [2020-09-24 20:22:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 20:22:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 317 transitions. [2020-09-24 20:22:52,353 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 317 transitions. Word has length 86 [2020-09-24 20:22:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:52,354 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 317 transitions. [2020-09-24 20:22:52,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:22:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 317 transitions. [2020-09-24 20:22:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 20:22:52,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:52,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:52,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:22:52,358 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1996302692, now seen corresponding path program 2 times [2020-09-24 20:22:52,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:52,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245195110] [2020-09-24 20:22:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 20:22:52,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-24 20:22:52,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:22:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-09-24 20:22:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 20:22:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:52,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:52,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:52,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:52,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 20:22:52,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:22:52,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:52,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 20:22:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:52,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:52,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:52,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:52,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 20:22:52,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:52,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 20:22:52,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245195110] [2020-09-24 20:22:52,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:22:52,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:22:52,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854670555] [2020-09-24 20:22:52,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:22:52,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:22:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:22:52,841 INFO L87 Difference]: Start difference. First operand 274 states and 317 transitions. Second operand 8 states. [2020-09-24 20:22:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:53,034 INFO L93 Difference]: Finished difference Result 373 states and 433 transitions. [2020-09-24 20:22:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:22:53,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-09-24 20:22:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:53,038 INFO L225 Difference]: With dead ends: 373 [2020-09-24 20:22:53,039 INFO L226 Difference]: Without dead ends: 314 [2020-09-24 20:22:53,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:22:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-24 20:22:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2020-09-24 20:22:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-24 20:22:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 311 transitions. [2020-09-24 20:22:53,056 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 311 transitions. Word has length 86 [2020-09-24 20:22:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:53,057 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 311 transitions. [2020-09-24 20:22:53,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:22:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 311 transitions. [2020-09-24 20:22:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 20:22:53,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:53,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:53,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:22:53,060 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash 808883757, now seen corresponding path program 1 times [2020-09-24 20:22:53,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:53,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966200879] [2020-09-24 20:22:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:53,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:54,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:54,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 20:22:54,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:22:54,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-09-24 20:22:54,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 20:22:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 20:22:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 20:22:54,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:54,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:54,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:54,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:54,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:54,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:54,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:54,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:54,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:54,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:54,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:54,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:54,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:54,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:54,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:54,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:54,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:54,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:54,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:54,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:54,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:22:54,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:54,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:54,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:54,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:54,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 20:22:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:54,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:54,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:22:54,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:54,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 20:22:54,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:54,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:22:54,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 20:22:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966200879] [2020-09-24 20:22:55,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:55,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 20:22:55,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888271855] [2020-09-24 20:22:55,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 20:22:55,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 20:22:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:22:55,014 INFO L87 Difference]: Start difference. First operand 271 states and 311 transitions. Second operand 20 states. [2020-09-24 20:22:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:55,684 INFO L93 Difference]: Finished difference Result 357 states and 412 transitions. [2020-09-24 20:22:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:22:55,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-09-24 20:22:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:55,688 INFO L225 Difference]: With dead ends: 357 [2020-09-24 20:22:55,688 INFO L226 Difference]: Without dead ends: 273 [2020-09-24 20:22:55,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-09-24 20:22:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-24 20:22:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2020-09-24 20:22:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 20:22:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2020-09-24 20:22:55,707 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 88 [2020-09-24 20:22:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:55,707 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2020-09-24 20:22:55,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 20:22:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2020-09-24 20:22:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 20:22:55,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:55,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:55,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:22:55,711 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash -289139437, now seen corresponding path program 1 times [2020-09-24 20:22:55,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:55,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456629249] [2020-09-24 20:22:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 20:22:56,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-09-24 20:22:56,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:22:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 20:22:56,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 20:22:56,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:56,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:56,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:56,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:56,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:56,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:56,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:56,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:56,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:22:56,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 20:22:56,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 20:22:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:56,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:56,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 20:22:56,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 20:22:56,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:22:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:22:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 20:22:56,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456629249] [2020-09-24 20:22:56,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:22:56,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:22:56,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528568840] [2020-09-24 20:22:56,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:22:56,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:22:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:22:56,251 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand 10 states. [2020-09-24 20:22:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:56,469 INFO L93 Difference]: Finished difference Result 327 states and 372 transitions. [2020-09-24 20:22:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:22:56,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-09-24 20:22:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:56,472 INFO L225 Difference]: With dead ends: 327 [2020-09-24 20:22:56,472 INFO L226 Difference]: Without dead ends: 243 [2020-09-24 20:22:56,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:22:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-24 20:22:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2020-09-24 20:22:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 20:22:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 252 transitions. [2020-09-24 20:22:56,490 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 252 transitions. Word has length 89 [2020-09-24 20:22:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:56,490 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 252 transitions. [2020-09-24 20:22:56,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:22:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 252 transitions. [2020-09-24 20:22:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 20:22:56,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:56,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:56,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:22:56,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1795206334, now seen corresponding path program 3 times [2020-09-24 20:22:56,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:56,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895332711] [2020-09-24 20:22:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:57,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:57,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 20:22:57,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:57,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-09-24 20:22:57,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:22:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-24 20:22:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 20:22:57,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:22:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:57,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:57,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:22:57,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:22:57,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:57,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:57,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:22:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:57,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:57,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 20:22:57,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:57,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:22:57,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:57,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:22:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:22:57,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:22:57,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:22:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:57,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:57,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:22:57,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:57,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 20:22:57,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:22:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:57,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 20:22:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:57,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 20:22:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:22:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:22:57,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:22:57,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 20:22:57,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:22:57,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 20:22:57,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:22:57,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:22:57,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:22:57,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:22:57,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:22:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 20:22:57,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895332711] [2020-09-24 20:22:57,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:22:57,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 20:22:57,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435288265] [2020-09-24 20:22:57,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:22:57,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:22:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:22:57,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:22:57,679 INFO L87 Difference]: Start difference. First operand 226 states and 252 transitions. Second operand 15 states. [2020-09-24 20:22:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:22:58,249 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2020-09-24 20:22:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:22:58,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-09-24 20:22:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:22:58,253 INFO L225 Difference]: With dead ends: 362 [2020-09-24 20:22:58,253 INFO L226 Difference]: Without dead ends: 303 [2020-09-24 20:22:58,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:22:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-09-24 20:22:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 276. [2020-09-24 20:22:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 20:22:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 311 transitions. [2020-09-24 20:22:58,270 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 311 transitions. Word has length 89 [2020-09-24 20:22:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:22:58,270 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 311 transitions. [2020-09-24 20:22:58,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:22:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 311 transitions. [2020-09-24 20:22:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 20:22:58,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:22:58,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-09-24 20:22:58,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:22:58,273 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:22:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:22:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1839352304, now seen corresponding path program 1 times [2020-09-24 20:22:58,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:22:58,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320952747] [2020-09-24 20:22:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:22:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:22:58,295 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:22:58,296 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:22:58,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:22:58,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:22:58 BoogieIcfgContainer [2020-09-24 20:22:58,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:22:58,332 INFO L168 Benchmark]: Toolchain (without parser) took 15629.88 ms. Allocated memory was 148.4 MB in the beginning and 342.9 MB in the end (delta: 194.5 MB). Free memory was 102.8 MB in the beginning and 112.2 MB in the end (delta: -9.4 MB). Peak memory consumption was 185.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,333 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 555.17 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.2 MB in the beginning and 182.4 MB in the end (delta: -80.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,335 INFO L168 Benchmark]: Boogie Preprocessor took 55.57 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 180.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,336 INFO L168 Benchmark]: RCFGBuilder took 667.75 ms. Allocated memory is still 204.5 MB. Free memory was 179.6 MB in the beginning and 149.2 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,337 INFO L168 Benchmark]: TraceAbstraction took 14337.10 ms. Allocated memory was 204.5 MB in the beginning and 342.9 MB in the end (delta: 138.4 MB). Free memory was 148.6 MB in the beginning and 112.2 MB in the end (delta: 36.4 MB). Peak memory consumption was 174.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:22:58,341 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 555.17 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.2 MB in the beginning and 182.4 MB in the end (delta: -80.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.57 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 180.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 667.75 ms. Allocated memory is still 204.5 MB. Free memory was 179.6 MB in the beginning and 149.2 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14337.10 ms. Allocated memory was 204.5 MB in the beginning and 342.9 MB in the end (delta: 138.4 MB). Free memory was 148.6 MB in the beginning and 112.2 MB in the end (delta: 36.4 MB). Peak memory consumption was 174.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 103, overapproximation of bitwiseAnd at line 101. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; [L231] CALL, EXPR base2flt(0, 0) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND TRUE ! m [L20] __retres4 = 0U [L70] return (__retres4); [L231] RET, EXPR base2flt(0, 0) [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND TRUE m >= 1U << 25U [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U [L70] return (__retres4); [L232] RET, EXPR base2flt(ma, ea) [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND FALSE !(m >= 1U << 25U) [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res [L70] return (__retres4); [L233] RET, EXPR base2flt(mb, eb) [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; [L84] COND FALSE !(a < b) [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) [L104] CALL __VERIFIER_assert(ea >= eb) [L6] COND TRUE !(cond) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 169 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.2s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1227 SDtfs, 630 SDslu, 13164 SDs, 0 SdLazy, 1417 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=276occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 214 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 779 NumberOfCodeBlocks, 779 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 681 ConstructedInterpolants, 0 QuantifiedInterpolants, 199861 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 191/206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...