/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=0.4 --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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:31:29,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:31:29,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:31:29,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:31:29,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:31:29,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:31:29,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:31:29,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:31:29,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:31:29,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:31:29,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:31:29,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:31:29,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:31:29,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:31:29,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:31:29,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:31:29,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:31:29,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:31:29,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:31:29,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:31:29,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:31:29,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:31:29,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:31:29,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:31:29,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:31:29,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:31:29,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:31:29,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:31:29,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:31:29,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:31:29,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:31:29,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:31:29,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:31:29,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:31:29,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:31:29,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:31:29,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:31:29,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:31:29,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:31:29,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:31:29,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:31:29,788 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 13:31:29,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:31:29,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:31:29,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:31:29,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:31:29,847 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:31:29,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:31:29,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:31:29,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:31:29,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:31:29,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:31:29,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:31:29,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:31:29,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:31:29,851 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:31:29,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:31:29,851 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:31:29,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:31:29,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:31:29,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:31:29,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:31:29,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:31:29,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:31:29,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:31:29,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:31:29,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:31:29,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:31:29,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:31:29,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:31:29,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:31:29,854 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:31:30,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:31:30,341 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:31:30,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:31:30,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:31:30,349 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:31:30,350 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-25 13:31:30,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac6d8568/f0cd8dff89374654ace11bdaff44095d/FLAG51f536839 [2020-09-25 13:31:31,093 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:31:31,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-25 13:31:31,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac6d8568/f0cd8dff89374654ace11bdaff44095d/FLAG51f536839 [2020-09-25 13:31:31,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8ac6d8568/f0cd8dff89374654ace11bdaff44095d [2020-09-25 13:31:31,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:31:31,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:31:31,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:31:31,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:31:31,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:31:31,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:31:31" (1/1) ... [2020-09-25 13:31:31,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d5d771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:31, skipping insertion in model container [2020-09-25 13:31:31,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:31:31" (1/1) ... [2020-09-25 13:31:31,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:31:31,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:31:31,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:31:31,957 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:31:32,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:31:32,239 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:31:32,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32 WrapperNode [2020-09-25 13:31:32,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:31:32,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:31:32,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:31:32,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:31:32,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (1/1) ... [2020-09-25 13:31:32,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:31:32,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:31:32,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:31:32,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:31:32,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (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 13:31:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:31:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:31:32,475 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 13:31:32,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:31:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 13:31:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:31:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:31:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:31:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:31:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:31:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:31:33,948 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:31:33,949 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:31:33,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:31:33 BoogieIcfgContainer [2020-09-25 13:31:33,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:31:33,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:31:33,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:31:33,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:31:33,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:31:31" (1/3) ... [2020-09-25 13:31:33,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b823426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:31:33, skipping insertion in model container [2020-09-25 13:31:33,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:31:32" (2/3) ... [2020-09-25 13:31:33,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b823426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:31:33, skipping insertion in model container [2020-09-25 13:31:33,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:31:33" (3/3) ... [2020-09-25 13:31:33,969 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label18.c [2020-09-25 13:31:33,981 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:31:33,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:31:34,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:31:34,056 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:31:34,056 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:31:34,056 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:31:34,057 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:31:34,057 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:31:34,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:31:34,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:31:34,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:31:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 13:31:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 13:31:34,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:34,113 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] [2020-09-25 13:31:34,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1150212666, now seen corresponding path program 1 times [2020-09-25 13:31:34,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:34,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396302411] [2020-09-25 13:31:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:34,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:36,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:37,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:37,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:39,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:39,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-25 13:31:39,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:31:39,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:31:39,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:39,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:31:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 13:31:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 13:31:39,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:31:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:39,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:39,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:39,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:39,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:39,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 13:31:39,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:39,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:31:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 13:31:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:39,779 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 13:31:39,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396302411] [2020-09-25 13:31:39,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:31:39,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:31:39,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88991548] [2020-09-25 13:31:39,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:31:39,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:31:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:31:39,817 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 13:31:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:42,122 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-25 13:31:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:31:42,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-09-25 13:31:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:42,149 INFO L225 Difference]: With dead ends: 1386 [2020-09-25 13:31:42,149 INFO L226 Difference]: Without dead ends: 787 [2020-09-25 13:31:42,159 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 13:31:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-25 13:31:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-25 13:31:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-25 13:31:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-25 13:31:42,276 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 153 [2020-09-25 13:31:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:42,278 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-25 13:31:42,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:31:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-25 13:31:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-25 13:31:42,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:42,286 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-09-25 13:31:42,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:31:42,286 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash -497277338, now seen corresponding path program 1 times [2020-09-25 13:31:42,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:42,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276651692] [2020-09-25 13:31:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:42,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:44,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:45,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:46,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:47,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-25 13:31:47,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:31:47,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:31:47,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:47,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:31:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 13:31:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 13:31:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:47,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:47,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:47,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:47,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:47,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 13:31:47,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:47,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:47,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:47,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:47,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 13:31:47,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:47,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 13:31:47,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:47,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:31:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:31:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:31:47,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276651692] [2020-09-25 13:31:47,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:47,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:31:47,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139251272] [2020-09-25 13:31:47,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:31:47,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:31:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:31:47,815 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 8 states. [2020-09-25 13:31:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:31:52,397 INFO L93 Difference]: Finished difference Result 2345 states and 3150 transitions. [2020-09-25 13:31:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:31:52,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 171 [2020-09-25 13:31:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:31:52,410 INFO L225 Difference]: With dead ends: 2345 [2020-09-25 13:31:52,410 INFO L226 Difference]: Without dead ends: 1379 [2020-09-25 13:31:52,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-25 13:31:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2020-09-25 13:31:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1330. [2020-09-25 13:31:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1330 states. [2020-09-25 13:31:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1579 transitions. [2020-09-25 13:31:52,472 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1579 transitions. Word has length 171 [2020-09-25 13:31:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:31:52,473 INFO L479 AbstractCegarLoop]: Abstraction has 1330 states and 1579 transitions. [2020-09-25 13:31:52,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:31:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1579 transitions. [2020-09-25 13:31:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-09-25 13:31:52,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:31:52,480 INFO L422 BasicCegarLoop]: trace histogram [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 13:31:52,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:31:52,480 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:31:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:31:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 243110088, now seen corresponding path program 1 times [2020-09-25 13:31:52,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:31:52,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792237611] [2020-09-25 13:31:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:31:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:55,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:57,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:57,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-09-25 13:31:57,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 13:31:57,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 13:31:57,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:57,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:31:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-25 13:31:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-25 13:31:57,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:31:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:57,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:57,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:31:57,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:57,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:31:57,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:57,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:31:57,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:31:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:57,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:31:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:31:57,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:31:57,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:31:57,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 13:31:57,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:31:57,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 13:31:57,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:31:57,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:31:57,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:31:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:31:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:31:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:31:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:31:58,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792237611] [2020-09-25 13:31:58,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:31:58,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:31:58,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878584858] [2020-09-25 13:31:58,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:31:58,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:31:58,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:31:58,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:31:58,366 INFO L87 Difference]: Start difference. First operand 1330 states and 1579 transitions. Second operand 8 states. [2020-09-25 13:32:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:32:02,474 INFO L93 Difference]: Finished difference Result 3722 states and 4559 transitions. [2020-09-25 13:32:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 13:32:02,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 174 [2020-09-25 13:32:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:32:02,513 INFO L225 Difference]: With dead ends: 3722 [2020-09-25 13:32:02,513 INFO L226 Difference]: Without dead ends: 2317 [2020-09-25 13:32:02,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-25 13:32:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2020-09-25 13:32:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2244. [2020-09-25 13:32:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2020-09-25 13:32:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2584 transitions. [2020-09-25 13:32:02,654 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2584 transitions. Word has length 174 [2020-09-25 13:32:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:32:02,655 INFO L479 AbstractCegarLoop]: Abstraction has 2244 states and 2584 transitions. [2020-09-25 13:32:02,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:32:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2584 transitions. [2020-09-25 13:32:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 13:32:02,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:32:02,674 INFO L422 BasicCegarLoop]: trace histogram [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 13:32:02,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:32:02,675 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:32:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:32:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1493028965, now seen corresponding path program 1 times [2020-09-25 13:32:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:32:02,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467549425] [2020-09-25 13:32:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:32:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:06,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:07,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:07,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:07,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 13:32:07,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:32:07,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 13:32:07,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:07,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:32:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-25 13:32:07,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 13:32:07,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:07,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:32:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:07,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:07,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:32:07,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:32:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:32:07,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:07,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:07,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:32:07,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:32:07,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:32:07,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:07,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:32:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:07,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:07,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:07,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 13:32:07,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:32:07,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 13:32:07,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:07,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:32:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:32:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:32:07,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:32:08,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467549425] [2020-09-25 13:32:08,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:32:08,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:32:08,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235981174] [2020-09-25 13:32:08,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:32:08,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:32:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:32:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:32:08,114 INFO L87 Difference]: Start difference. First operand 2244 states and 2584 transitions. Second operand 5 states. [2020-09-25 13:32:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:32:09,857 INFO L93 Difference]: Finished difference Result 4809 states and 5681 transitions. [2020-09-25 13:32:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:32:09,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-09-25 13:32:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:32:09,872 INFO L225 Difference]: With dead ends: 4809 [2020-09-25 13:32:09,872 INFO L226 Difference]: Without dead ends: 2587 [2020-09-25 13:32:09,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:32:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2020-09-25 13:32:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2396. [2020-09-25 13:32:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-09-25 13:32:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 2823 transitions. [2020-09-25 13:32:09,955 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 2823 transitions. Word has length 177 [2020-09-25 13:32:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:32:09,956 INFO L479 AbstractCegarLoop]: Abstraction has 2396 states and 2823 transitions. [2020-09-25 13:32:09,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:32:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 2823 transitions. [2020-09-25 13:32:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-25 13:32:09,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:32:09,964 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] [2020-09-25 13:32:09,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:32:09,964 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:32:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:32:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1265190879, now seen corresponding path program 1 times [2020-09-25 13:32:09,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:32:09,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371894858] [2020-09-25 13:32:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:32:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:10,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:13,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:14,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:14,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 13:32:14,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 13:32:14,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 13:32:14,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:14,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:14,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:32:14,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-25 13:32:14,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-09-25 13:32:14,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:32:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:15,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:15,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 13:32:15,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:32:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:32:15,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:15,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:32:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:32:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:32:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:15,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 13:32:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:15,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:32:15,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 13:32:15,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:32:15,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 13:32:15,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:32:15,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:32:15,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:32:15,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:32:15,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 13:32:15,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:32:15,390 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 13:32:15,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371894858] [2020-09-25 13:32:15,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:32:15,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 13:32:15,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570909320] [2020-09-25 13:32:15,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 13:32:15,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:32:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 13:32:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:32:15,394 INFO L87 Difference]: Start difference. First operand 2396 states and 2823 transitions. Second operand 6 states. [2020-09-25 13:32:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:32:17,447 INFO L93 Difference]: Finished difference Result 5591 states and 6843 transitions. [2020-09-25 13:32:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:32:17,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2020-09-25 13:32:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:32:17,466 INFO L225 Difference]: With dead ends: 5591 [2020-09-25 13:32:17,466 INFO L226 Difference]: Without dead ends: 3217 [2020-09-25 13:32:17,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:32:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2020-09-25 13:32:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 3158. [2020-09-25 13:32:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3158 states. [2020-09-25 13:32:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 3873 transitions. [2020-09-25 13:32:17,562 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 3873 transitions. Word has length 187 [2020-09-25 13:32:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:32:17,562 INFO L479 AbstractCegarLoop]: Abstraction has 3158 states and 3873 transitions. [2020-09-25 13:32:17,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 13:32:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 3873 transitions. [2020-09-25 13:32:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-09-25 13:32:17,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:32:17,578 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:32:17,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:32:17,578 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:32:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:32:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1373265253, now seen corresponding path program 1 times [2020-09-25 13:32:17,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:32:17,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307030078] [2020-09-25 13:32:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:32:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:32:17,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:17,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:32:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking...