/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:16:47,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:16:47,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:16:47,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:16:47,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:16:47,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:16:47,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:16:47,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:16:47,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:16:47,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:16:47,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:16:47,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:16:47,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:16:47,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:16:47,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:16:47,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:16:47,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:16:47,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:16:47,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:16:47,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:16:47,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:16:47,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:16:47,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:16:47,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:16:47,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:16:47,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:16:47,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:16:47,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:16:47,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:16:47,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:16:47,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:16:47,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:16:47,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:16:47,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:16:47,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:16:47,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:16:47,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:16:47,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:16:47,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:16:47,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:16:47,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:16:47,757 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 11:16:47,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:16:47,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:16:47,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:16:47,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:16:47,783 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:16:47,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:16:47,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:16:47,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:16:47,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:16:47,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:16:47,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:16:47,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:16:47,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:16:47,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:16:47,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:16:47,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:16:47,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:16:47,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:16:47,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:16:47,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:16:47,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:16:47,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:16:47,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:16:47,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:16:47,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:16:47,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:16:47,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:16:47,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:16:47,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:16:47,788 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:16:48,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:16:48,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:16:48,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:16:48,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:16:48,321 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:16:48,322 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label34.c [2020-09-25 11:16:48,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58eec901/32e8fa9fa7434ed2ae56ac11a5c7cfbf/FLAG719f0a4c4 [2020-09-25 11:16:49,071 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:16:49,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label34.c [2020-09-25 11:16:49,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58eec901/32e8fa9fa7434ed2ae56ac11a5c7cfbf/FLAG719f0a4c4 [2020-09-25 11:16:49,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c58eec901/32e8fa9fa7434ed2ae56ac11a5c7cfbf [2020-09-25 11:16:49,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:16:49,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:16:49,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:49,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:16:49,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:16:49,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:49" (1/1) ... [2020-09-25 11:16:49,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:49, skipping insertion in model container [2020-09-25 11:16:49,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:49" (1/1) ... [2020-09-25 11:16:49,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:16:49,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:16:49,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:49,861 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:16:50,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:50,115 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:16:50,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50 WrapperNode [2020-09-25 11:16:50,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:50,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:16:50,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:16:50,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:16:50,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (1/1) ... [2020-09-25 11:16:50,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:16:50,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:16:50,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:16:50,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:16:50,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (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 11:16:50,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:16:50,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:16:50,363 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:16:50,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:16:50,363 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:16:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:16:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:16:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:16:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:16:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:16:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:16:51,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:16:51,727 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:16:51,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:51 BoogieIcfgContainer [2020-09-25 11:16:51,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:16:51,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:16:51,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:16:51,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:16:51,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:16:49" (1/3) ... [2020-09-25 11:16:51,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c445f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:51, skipping insertion in model container [2020-09-25 11:16:51,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:50" (2/3) ... [2020-09-25 11:16:51,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c445f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:51, skipping insertion in model container [2020-09-25 11:16:51,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:51" (3/3) ... [2020-09-25 11:16:51,757 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label34.c [2020-09-25 11:16:51,769 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:16:51,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:16:51,807 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:16:51,852 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:16:51,852 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:16:51,852 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:16:51,852 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:16:51,853 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:16:51,853 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:16:51,853 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:16:51,853 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:16:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:16:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-25 11:16:51,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:51,908 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] [2020-09-25 11:16:51,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1247500167, now seen corresponding path program 1 times [2020-09-25 11:16:51,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:51,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11241220] [2020-09-25 11:16:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:52,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:52,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:54,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:56,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-25 11:16:57,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:16:57,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 11:16:57,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 11:16:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 11:16:57,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 11:16:57,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:57,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:57,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:57,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 11:16:57,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:57,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:57,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:16:57,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:57,559 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 11:16:57,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11241220] [2020-09-25 11:16:57,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:16:57,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:16:57,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052481146] [2020-09-25 11:16:57,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:16:57,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:16:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:16:57,593 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:17:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:00,090 INFO L93 Difference]: Finished difference Result 1206 states and 1652 transitions. [2020-09-25 11:17:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:17:00,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-09-25 11:17:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:00,128 INFO L225 Difference]: With dead ends: 1206 [2020-09-25 11:17:00,128 INFO L226 Difference]: Without dead ends: 628 [2020-09-25 11:17:00,140 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 11:17:00,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-09-25 11:17:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 615. [2020-09-25 11:17:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-09-25 11:17:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-09-25 11:17:00,260 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 124 [2020-09-25 11:17:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:00,261 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-09-25 11:17:00,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:17:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-09-25 11:17:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-25 11:17:00,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:00,278 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] [2020-09-25 11:17:00,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:17:00,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:00,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1775646540, now seen corresponding path program 1 times [2020-09-25 11:17:00,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:00,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526742165] [2020-09-25 11:17:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:00,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:02,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 11:17:04,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:17:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3998 [2020-09-25 11:17:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-25 11:17:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-25 11:17:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:04,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:17:04,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:04,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:04,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:17:04,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 11:17:04,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:17:04,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:04,610 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 11:17:04,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526742165] [2020-09-25 11:17:04,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:04,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:17:04,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267586318] [2020-09-25 11:17:04,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:17:04,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:17:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:17:04,615 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 6 states. [2020-09-25 11:17:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:07,040 INFO L93 Difference]: Finished difference Result 1865 states and 2456 transitions. [2020-09-25 11:17:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:17:07,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2020-09-25 11:17:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:07,056 INFO L225 Difference]: With dead ends: 1865 [2020-09-25 11:17:07,057 INFO L226 Difference]: Without dead ends: 1272 [2020-09-25 11:17:07,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:17:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2020-09-25 11:17:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1225. [2020-09-25 11:17:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-25 11:17:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1534 transitions. [2020-09-25 11:17:07,136 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1534 transitions. Word has length 158 [2020-09-25 11:17:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:07,137 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1534 transitions. [2020-09-25 11:17:07,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:17:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1534 transitions. [2020-09-25 11:17:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-25 11:17:07,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:07,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:17:07,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:17:07,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash 313926274, now seen corresponding path program 1 times [2020-09-25 11:17:07,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:07,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568667021] [2020-09-25 11:17:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:07,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:07,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:09,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:12,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:12,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:12,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-25 11:17:12,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:17:12,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 11:17:12,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:12,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 11:17:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:17:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-25 11:17:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:13,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:13,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:13,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:13,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 11:17:13,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:13,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:17:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:17:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:13,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:13,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:13,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:13,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:17:13,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:13,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-25 11:17:13,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:13,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:13,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 11:17:13,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:13,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568667021] [2020-09-25 11:17:13,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:13,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:17:13,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657278904] [2020-09-25 11:17:13,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:17:13,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:17:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:17:13,580 INFO L87 Difference]: Start difference. First operand 1225 states and 1534 transitions. Second operand 16 states. [2020-09-25 11:17:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:17,986 INFO L93 Difference]: Finished difference Result 4357 states and 5822 transitions. [2020-09-25 11:17:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:17:17,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-09-25 11:17:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:18,017 INFO L225 Difference]: With dead ends: 4357 [2020-09-25 11:17:18,018 INFO L226 Difference]: Without dead ends: 3154 [2020-09-25 11:17:18,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:17:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-09-25 11:17:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2720. [2020-09-25 11:17:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-09-25 11:17:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 3456 transitions. [2020-09-25 11:17:18,191 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 3456 transitions. Word has length 168 [2020-09-25 11:17:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:18,192 INFO L479 AbstractCegarLoop]: Abstraction has 2720 states and 3456 transitions. [2020-09-25 11:17:18,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:17:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 3456 transitions. [2020-09-25 11:17:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 11:17:18,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:18,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:18,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:17:18,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1808172842, now seen corresponding path program 1 times [2020-09-25 11:17:18,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:18,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104053691] [2020-09-25 11:17:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:20,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:22,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:17:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 11:17:23,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-09-25 11:17:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:23,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:23,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:23,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:23,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 11:17:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:23,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:23,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:17:23,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:23,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:17:23,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:23,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 11:17:23,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:23,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 11:17:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:23,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:17:23,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:23,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-09-25 11:17:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 11:17:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 11:17:23,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104053691] [2020-09-25 11:17:23,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:23,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:17:23,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160333772] [2020-09-25 11:17:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:17:23,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:17:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:17:23,740 INFO L87 Difference]: Start difference. First operand 2720 states and 3456 transitions. Second operand 6 states. [2020-09-25 11:17:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:25,801 INFO L93 Difference]: Finished difference Result 5372 states and 6964 transitions. [2020-09-25 11:17:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:17:25,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2020-09-25 11:17:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:25,817 INFO L225 Difference]: With dead ends: 5372 [2020-09-25 11:17:25,817 INFO L226 Difference]: Without dead ends: 2339 [2020-09-25 11:17:25,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:17:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2020-09-25 11:17:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1953. [2020-09-25 11:17:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-09-25 11:17:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2313 transitions. [2020-09-25 11:17:25,902 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2313 transitions. Word has length 186 [2020-09-25 11:17:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:25,904 INFO L479 AbstractCegarLoop]: Abstraction has 1953 states and 2313 transitions. [2020-09-25 11:17:25,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:17:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2313 transitions. [2020-09-25 11:17:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-25 11:17:25,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:25,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 11:17:25,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:17:25,913 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1819143480, now seen corresponding path program 1 times [2020-09-25 11:17:25,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:25,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994946833] [2020-09-25 11:17:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:25,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:26,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:29,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:29,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-25 11:17:29,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:17:29,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3217 [2020-09-25 11:17:29,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:29,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 11:17:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 11:17:29,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:29,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:29,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:17:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:29,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:29,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:29,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:29,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:29,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:17:29,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:17:29,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:29,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 11:17:29,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 11:17:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:29,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:29,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:29,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 11:17:29,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:29,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-25 11:17:29,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:29,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:29,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:17:29,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:17:29,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 11:17:29,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:17:29,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994946833] [2020-09-25 11:17:29,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:29,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:17:29,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366897150] [2020-09-25 11:17:29,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:17:29,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:17:29,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:17:29,530 INFO L87 Difference]: Start difference. First operand 1953 states and 2313 transitions. Second operand 7 states. [2020-09-25 11:17:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:30,806 INFO L93 Difference]: Finished difference Result 3390 states and 4076 transitions. [2020-09-25 11:17:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:17:30,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2020-09-25 11:17:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:30,812 INFO L225 Difference]: With dead ends: 3390 [2020-09-25 11:17:30,812 INFO L226 Difference]: Without dead ends: 1069 [2020-09-25 11:17:30,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:17:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-09-25 11:17:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1047. [2020-09-25 11:17:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2020-09-25 11:17:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1237 transitions. [2020-09-25 11:17:30,845 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1237 transitions. Word has length 211 [2020-09-25 11:17:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:30,846 INFO L479 AbstractCegarLoop]: Abstraction has 1047 states and 1237 transitions. [2020-09-25 11:17:30,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:17:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1237 transitions. [2020-09-25 11:17:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-25 11:17:30,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:30,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:30,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:17:30,852 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash -490074196, now seen corresponding path program 1 times [2020-09-25 11:17:30,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:30,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366615587] [2020-09-25 11:17:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:31,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:32,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:35,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:35,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:17:35,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-09-25 11:17:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 11:17:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:36,456 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-09-25 11:17:36,681 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-09-25 11:17:36,886 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-09-25 11:17:37,076 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-09-25 11:17:37,265 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2020-09-25 11:17:37,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:37,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:37,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:37,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:37,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 11:17:37,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 11:17:37,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:37,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-25 11:17:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking...