/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:53:44,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:53:44,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:53:44,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:53:44,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:53:44,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:53:44,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:53:44,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:53:44,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:53:44,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:53:44,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:53:44,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:53:44,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:53:44,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:53:44,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:53:44,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:53:44,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:53:44,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:53:44,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:53:44,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:53:44,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:53:44,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:53:44,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:53:44,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:53:44,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:53:44,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:53:44,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:53:44,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:53:44,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:53:44,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:53:44,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:53:44,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:53:44,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:53:44,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:53:44,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:53:44,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:53:44,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:53:44,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:53:44,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:53:44,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:53:44,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:53:44,167 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 [2020-09-25 07:53:44,214 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:53:44,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:53:44,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:53:44,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:53:44,217 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:53:44,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:53:44,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:53:44,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:53:44,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:53:44,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:53:44,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:53:44,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:53:44,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:53:44,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:53:44,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:53:44,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:53:44,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:53:44,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:53:44,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:53:44,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:53:44,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:53:44,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:53:44,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:53:44,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:53:44,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:53:44,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:53:44,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:53:44,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:53:44,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:53:44,224 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:53:44,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:53:44,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:53:44,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:53:44,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:53:44,737 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:53:44,738 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2020-09-25 07:53:44,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7824997f8/ebdd3654f1a94833978650ac7a0510b5/FLAG56e2cc6d8 [2020-09-25 07:53:45,471 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:53:45,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2020-09-25 07:53:45,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7824997f8/ebdd3654f1a94833978650ac7a0510b5/FLAG56e2cc6d8 [2020-09-25 07:53:45,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7824997f8/ebdd3654f1a94833978650ac7a0510b5 [2020-09-25 07:53:45,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:53:45,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:53:45,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:53:45,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:53:45,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:53:45,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:53:45" (1/1) ... [2020-09-25 07:53:45,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bef0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:45, skipping insertion in model container [2020-09-25 07:53:45,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:53:45" (1/1) ... [2020-09-25 07:53:45,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:53:45,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:53:46,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:53:46,555 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:53:46,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:53:46,652 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:53:46,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46 WrapperNode [2020-09-25 07:53:46,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:53:46,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:53:46,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:53:46,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:53:46,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (1/1) ... [2020-09-25 07:53:46,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:53:46,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:53:46,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:53:46,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:53:46,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (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 [2020-09-25 07:53:46,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:53:46,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:53:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 07:53:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:53:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 07:53:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:53:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:53:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:53:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:53:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:53:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:53:48,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:53:48,350 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 07:53:48,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:53:48 BoogieIcfgContainer [2020-09-25 07:53:48,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:53:48,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:53:48,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:53:48,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:53:48,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:53:45" (1/3) ... [2020-09-25 07:53:48,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc05442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:53:48, skipping insertion in model container [2020-09-25 07:53:48,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:53:46" (2/3) ... [2020-09-25 07:53:48,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc05442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:53:48, skipping insertion in model container [2020-09-25 07:53:48,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:53:48" (3/3) ... [2020-09-25 07:53:48,374 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label26.c [2020-09-25 07:53:48,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:53:48,401 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:53:48,427 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:53:48,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:53:48,468 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:53:48,468 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:53:48,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:53:48,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:53:48,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:53:48,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:53:48,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:53:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 07:53:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-09-25 07:53:48,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:53:48,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:53:48,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:53:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:53:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1114585457, now seen corresponding path program 1 times [2020-09-25 07:53:48,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:53:48,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915908598] [2020-09-25 07:53:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:53:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:53:48,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:49,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:52,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:53,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:53:53,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-25 07:53:53,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:53:53,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 07:53:53,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:53:53,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:53:53,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:53:53,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 07:53:53,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-09-25 07:53:53,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:53:54,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:53:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:53:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:53:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:53:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:53:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 07:53:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:53:54,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:53:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:53:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:53:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 07:53:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:53:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:53:54,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915908598] [2020-09-25 07:53:54,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:53:54,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:53:54,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365608477] [2020-09-25 07:53:54,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:53:54,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:53:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:53:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:53:54,305 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 07:53:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:53:56,350 INFO L93 Difference]: Finished difference Result 1205 states and 1651 transitions. [2020-09-25 07:53:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:53:56,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-09-25 07:53:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:53:56,378 INFO L225 Difference]: With dead ends: 1205 [2020-09-25 07:53:56,378 INFO L226 Difference]: Without dead ends: 627 [2020-09-25 07:53:56,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:53:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-09-25 07:53:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-09-25 07:53:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-25 07:53:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 759 transitions. [2020-09-25 07:53:56,497 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 759 transitions. Word has length 162 [2020-09-25 07:53:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:53:56,498 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 759 transitions. [2020-09-25 07:53:56,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:53:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 759 transitions. [2020-09-25 07:53:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-25 07:53:56,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:53:56,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:53:56,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:53:56,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:53:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:53:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 156587372, now seen corresponding path program 1 times [2020-09-25 07:53:56,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:53:56,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461762317] [2020-09-25 07:53:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:53:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:53:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:56,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:53:58,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:01,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-09-25 07:54:01,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:54:01,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 07:54:01,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:01,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-09-25 07:54:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-09-25 07:54:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:01,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:01,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:01,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:54:01,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:01,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:01,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:01,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:01,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:01,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:01,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 07:54:01,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:01,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:54:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:54:01,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461762317] [2020-09-25 07:54:01,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:01,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 07:54:01,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252385190] [2020-09-25 07:54:01,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:54:01,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:54:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:54:01,865 INFO L87 Difference]: Start difference. First operand 613 states and 759 transitions. Second operand 5 states. [2020-09-25 07:54:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:03,863 INFO L93 Difference]: Finished difference Result 1519 states and 1962 transitions. [2020-09-25 07:54:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:54:03,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-09-25 07:54:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:03,876 INFO L225 Difference]: With dead ends: 1519 [2020-09-25 07:54:03,876 INFO L226 Difference]: Without dead ends: 710 [2020-09-25 07:54:03,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:54:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-09-25 07:54:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 700. [2020-09-25 07:54:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-09-25 07:54:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 835 transitions. [2020-09-25 07:54:03,918 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 835 transitions. Word has length 196 [2020-09-25 07:54:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:03,919 INFO L479 AbstractCegarLoop]: Abstraction has 700 states and 835 transitions. [2020-09-25 07:54:03,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:54:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 835 transitions. [2020-09-25 07:54:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-09-25 07:54:03,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:03,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:03,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:54:03,925 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -270211067, now seen corresponding path program 1 times [2020-09-25 07:54:03,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:03,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583427136] [2020-09-25 07:54:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:04,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:08,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:08,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-09-25 07:54:08,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 07:54:08,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 07:54:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:08,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 07:54:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 07:54:08,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:09,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:09,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:09,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:09,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:09,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 07:54:09,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:09,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 07:54:09,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:09,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:09,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:09,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:54:09,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-25 07:54:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:09,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 07:54:09,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:09,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-25 07:54:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:09,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:09,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:09,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:09,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 07:54:09,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:09,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:09,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:09,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 07:54:09,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583427136] [2020-09-25 07:54:09,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:09,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 07:54:09,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647779345] [2020-09-25 07:54:09,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 07:54:09,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 07:54:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 07:54:09,378 INFO L87 Difference]: Start difference. First operand 700 states and 835 transitions. Second operand 8 states. [2020-09-25 07:54:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:12,362 INFO L93 Difference]: Finished difference Result 2495 states and 3109 transitions. [2020-09-25 07:54:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 07:54:12,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 222 [2020-09-25 07:54:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:12,384 INFO L225 Difference]: With dead ends: 2495 [2020-09-25 07:54:12,385 INFO L226 Difference]: Without dead ends: 1817 [2020-09-25 07:54:12,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 07:54:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2020-09-25 07:54:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1652. [2020-09-25 07:54:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1652 states. [2020-09-25 07:54:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2030 transitions. [2020-09-25 07:54:12,498 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2030 transitions. Word has length 222 [2020-09-25 07:54:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:12,500 INFO L479 AbstractCegarLoop]: Abstraction has 1652 states and 2030 transitions. [2020-09-25 07:54:12,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 07:54:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2030 transitions. [2020-09-25 07:54:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-25 07:54:12,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:12,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:12,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:54:12,513 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 375157522, now seen corresponding path program 1 times [2020-09-25 07:54:12,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:12,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803862338] [2020-09-25 07:54:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:15,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:17,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-09-25 07:54:17,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:54:17,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 07:54:17,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:17,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 07:54:17,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 07:54:17,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:17,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:17,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:17,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:17,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 07:54:17,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:17,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 07:54:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:17,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:17,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 07:54:17,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:17,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 07:54:17,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:17,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:17,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:17,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 07:54:17,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:17,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 07:54:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:17,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:17,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:17,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:17,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 07:54:17,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:17,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:17,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 07:54:18,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803862338] [2020-09-25 07:54:18,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:18,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:18,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789887059] [2020-09-25 07:54:18,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:18,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:18,033 INFO L87 Difference]: Start difference. First operand 1652 states and 2030 transitions. Second operand 7 states. [2020-09-25 07:54:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:19,962 INFO L93 Difference]: Finished difference Result 4297 states and 5525 transitions. [2020-09-25 07:54:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 07:54:19,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 226 [2020-09-25 07:54:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:20,004 INFO L225 Difference]: With dead ends: 4297 [2020-09-25 07:54:20,005 INFO L226 Difference]: Without dead ends: 2667 [2020-09-25 07:54:20,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:54:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2020-09-25 07:54:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2277. [2020-09-25 07:54:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-09-25 07:54:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2797 transitions. [2020-09-25 07:54:20,116 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2797 transitions. Word has length 226 [2020-09-25 07:54:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:20,117 INFO L479 AbstractCegarLoop]: Abstraction has 2277 states and 2797 transitions. [2020-09-25 07:54:20,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:54:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2797 transitions. [2020-09-25 07:54:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-09-25 07:54:20,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:20,128 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:20,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:54:20,128 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash -711105748, now seen corresponding path program 1 times [2020-09-25 07:54:20,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:20,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886879474] [2020-09-25 07:54:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:20,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:24,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:54:25,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 07:54:25,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:54:25,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:54:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:25,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:54:25,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:25,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 07:54:25,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:25,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:54:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:54:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 07:54:25,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:25,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 07:54:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:25,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:25,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 07:54:25,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 07:54:25,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:25,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:54:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 07:54:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 07:54:25,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:25,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-25 07:54:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:25,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:25,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:54:25,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:54:25,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:54:25,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:54:25,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:54:25,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:54:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 07:54:25,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886879474] [2020-09-25 07:54:25,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:54:25,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 07:54:25,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829613322] [2020-09-25 07:54:25,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:54:25,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:54:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:54:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:54:25,524 INFO L87 Difference]: Start difference. First operand 2277 states and 2797 transitions. Second operand 7 states. [2020-09-25 07:54:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:54:27,611 INFO L93 Difference]: Finished difference Result 5513 states and 6911 transitions. [2020-09-25 07:54:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 07:54:27,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-09-25 07:54:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:54:27,630 INFO L225 Difference]: With dead ends: 5513 [2020-09-25 07:54:27,630 INFO L226 Difference]: Without dead ends: 3258 [2020-09-25 07:54:27,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:54:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2020-09-25 07:54:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3058. [2020-09-25 07:54:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3058 states. [2020-09-25 07:54:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 3664 transitions. [2020-09-25 07:54:27,736 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 3664 transitions. Word has length 234 [2020-09-25 07:54:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:54:27,736 INFO L479 AbstractCegarLoop]: Abstraction has 3058 states and 3664 transitions. [2020-09-25 07:54:27,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:54:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 3664 transitions. [2020-09-25 07:54:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-25 07:54:27,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:54:27,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:54:27,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:54:27,750 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:54:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:54:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -312816025, now seen corresponding path program 1 times [2020-09-25 07:54:27,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:54:27,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565432460] [2020-09-25 07:54:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:54:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:54:27,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:27,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:54:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking...