/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=0.3 --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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:24:23,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:24:23,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:24:23,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:24:23,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:24:23,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:24:23,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:24:23,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:24:23,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:24:23,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:24:23,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:24:23,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:24:23,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:24:23,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:24:23,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:24:23,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:24:23,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:24:23,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:24:23,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:24:23,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:24:23,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:24:23,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:24:23,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:24:23,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:24:23,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:24:23,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:24:23,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:24:23,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:24:23,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:24:23,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:24:23,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:24:23,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:24:23,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:24:23,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:24:23,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:24:23,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:24:23,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:24:23,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:24:23,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:24:23,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:24:23,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:24:23,352 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 12:24:23,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:24:23,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:24:23,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:24:23,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:24:23,409 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:24:23,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:24:23,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:24:23,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:24:23,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:24:23,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:24:23,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:24:23,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:24:23,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:24:23,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:24:23,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:24:23,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:24:23,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:24:23,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:24:23,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:24:23,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:24:23,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:24:23,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:24:23,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:24:23,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:24:23,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:24:23,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:24:23,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:24:23,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:24:23,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:24:23,416 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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;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=0.3;log-additional-information=true; [2020-09-25 12:24:23,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:24:23,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:24:23,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:24:23,915 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:24:23,916 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:24:23,917 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-25 12:24:24,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acb49feb7/5cd9c055311041be8713376d4a4a0715/FLAG08c922f5c [2020-09-25 12:24:24,669 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:24:24,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-25 12:24:24,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acb49feb7/5cd9c055311041be8713376d4a4a0715/FLAG08c922f5c [2020-09-25 12:24:24,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acb49feb7/5cd9c055311041be8713376d4a4a0715 [2020-09-25 12:24:24,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:24:24,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:24:24,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:24:24,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:24:24,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:24:24,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:24:24" (1/1) ... [2020-09-25 12:24:24,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ea5cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:24, skipping insertion in model container [2020-09-25 12:24:24,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:24:24" (1/1) ... [2020-09-25 12:24:24,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:24:25,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:24:25,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:24:25,594 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:24:25,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:24:25,777 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:24:25,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25 WrapperNode [2020-09-25 12:24:25,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:24:25,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:24:25,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:24:25,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:24:25,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (1/1) ... [2020-09-25 12:24:25,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:24:25,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:24:25,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:24:25,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:24:25,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (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 12:24:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:24:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:24:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:24:26,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:24:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:24:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:24:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:24:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:24:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:24:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:24:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:24:27,776 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:24:27,777 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:24:27,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:24:27 BoogieIcfgContainer [2020-09-25 12:24:27,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:24:27,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:24:27,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:24:27,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:24:27,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:24:24" (1/3) ... [2020-09-25 12:24:27,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33618888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:24:27, skipping insertion in model container [2020-09-25 12:24:27,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:24:25" (2/3) ... [2020-09-25 12:24:27,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33618888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:24:27, skipping insertion in model container [2020-09-25 12:24:27,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:24:27" (3/3) ... [2020-09-25 12:24:27,797 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label31.c [2020-09-25 12:24:27,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:24:27,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:24:27,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:24:27,883 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:24:27,883 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:24:27,884 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:24:27,884 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:24:27,884 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:24:27,884 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:24:27,884 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:24:27,884 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:24:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 12:24:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-25 12:24:27,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:27,939 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] [2020-09-25 12:24:27,940 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:27,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:27,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1921303583, now seen corresponding path program 1 times [2020-09-25 12:24:27,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:27,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062483882] [2020-09-25 12:24:27,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:33,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:33,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-25 12:24:33,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:24:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 12:24:33,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:33,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:24:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:24:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-25 12:24:33,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:24:33,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:33,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:33,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:33,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 12:24:33,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:33,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 12:24:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:33,744 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 12:24:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062483882] [2020-09-25 12:24:33,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:24:33,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:24:33,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983625653] [2020-09-25 12:24:33,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:24:33,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:24:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:24:33,785 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 12:24:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:36,172 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 12:24:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:24:36,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2020-09-25 12:24:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:36,199 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 12:24:36,199 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 12:24:36,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 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 12:24:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 12:24:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 12:24:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 12:24:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 12:24:36,337 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 142 [2020-09-25 12:24:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:36,339 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 12:24:36,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:24:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 12:24:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-25 12:24:36,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:36,353 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 12:24:36,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:24:36,354 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1928866778, now seen corresponding path program 1 times [2020-09-25 12:24:36,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:36,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792563944] [2020-09-25 12:24:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:36,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:40,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:41,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:41,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-25 12:24:41,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:24:41,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 12:24:41,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:41,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 12:24:41,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-25 12:24:41,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:41,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:41,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:41,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:41,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:41,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:41,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 12:24:41,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:41,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:41,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:41,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:41,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:41,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:41,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:24:41,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:41,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:41,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 12:24:41,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:24:41,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792563944] [2020-09-25 12:24:41,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:41,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:24:41,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998134043] [2020-09-25 12:24:41,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:24:41,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:24:41,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:24:41,614 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 12:24:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:43,537 INFO L93 Difference]: Finished difference Result 1533 states and 1847 transitions. [2020-09-25 12:24:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:43,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-09-25 12:24:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:43,548 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 12:24:43,548 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 12:24:43,550 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 12:24:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 12:24:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 924. [2020-09-25 12:24:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2020-09-25 12:24:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1105 transitions. [2020-09-25 12:24:43,596 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1105 transitions. Word has length 159 [2020-09-25 12:24:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:43,597 INFO L479 AbstractCegarLoop]: Abstraction has 924 states and 1105 transitions. [2020-09-25 12:24:43,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:24:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1105 transitions. [2020-09-25 12:24:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-25 12:24:43,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:43,603 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:43,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:24:43,604 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:43,604 INFO L82 PathProgramCache]: Analyzing trace with hash -745499371, now seen corresponding path program 1 times [2020-09-25 12:24:43,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:43,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077154142] [2020-09-25 12:24:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:43,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:48,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-09-25 12:24:48,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 12:24:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 12:24:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:48,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-09-25 12:24:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-25 12:24:48,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:48,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:48,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:48,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:48,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:24:48,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:48,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:48,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:24:48,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:24:48,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:48,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:48,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:48,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 12:24:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:48,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:48,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:24:48,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:48,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 12:24:48,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:48,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:48,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:24:48,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:48,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 12:24:48,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 12:24:48,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077154142] [2020-09-25 12:24:48,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:48,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:24:48,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160768188] [2020-09-25 12:24:48,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:24:48,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:24:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:24:48,972 INFO L87 Difference]: Start difference. First operand 924 states and 1105 transitions. Second operand 5 states. [2020-09-25 12:24:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:51,063 INFO L93 Difference]: Finished difference Result 2155 states and 2687 transitions. [2020-09-25 12:24:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:24:51,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-09-25 12:24:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:51,071 INFO L225 Difference]: With dead ends: 2155 [2020-09-25 12:24:51,071 INFO L226 Difference]: Without dead ends: 1253 [2020-09-25 12:24:51,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 12:24:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-09-25 12:24:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1230. [2020-09-25 12:24:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1230 states. [2020-09-25 12:24:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1459 transitions. [2020-09-25 12:24:51,117 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1459 transitions. Word has length 193 [2020-09-25 12:24:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:51,117 INFO L479 AbstractCegarLoop]: Abstraction has 1230 states and 1459 transitions. [2020-09-25 12:24:51,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:24:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1459 transitions. [2020-09-25 12:24:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-25 12:24:51,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:51,125 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:51,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:24:51,126 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -997755654, now seen corresponding path program 1 times [2020-09-25 12:24:51,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:51,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511474329] [2020-09-25 12:24:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:52,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:56,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:56,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:24:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-09-25 12:24:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 12:24:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:24:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:56,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:56,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:56,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:56,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 12:24:56,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:56,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:56,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:56,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:56,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:56,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:56,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 12:24:56,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 12:24:56,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:56,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:24:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:24:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 12:24:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:56,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:56,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:24:56,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-25 12:24:56,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:56,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:24:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:56,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:24:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 12:24:56,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511474329] [2020-09-25 12:24:56,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:56,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 12:24:56,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918636748] [2020-09-25 12:24:56,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:24:56,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:24:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:24:56,737 INFO L87 Difference]: Start difference. First operand 1230 states and 1459 transitions. Second operand 8 states. [2020-09-25 12:24:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:59,519 INFO L93 Difference]: Finished difference Result 2698 states and 3321 transitions. [2020-09-25 12:24:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:24:59,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 204 [2020-09-25 12:24:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:59,530 INFO L225 Difference]: With dead ends: 2698 [2020-09-25 12:24:59,531 INFO L226 Difference]: Without dead ends: 1392 [2020-09-25 12:24:59,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:24:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-09-25 12:24:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1376. [2020-09-25 12:24:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2020-09-25 12:24:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1618 transitions. [2020-09-25 12:24:59,590 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1618 transitions. Word has length 204 [2020-09-25 12:24:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:59,591 INFO L479 AbstractCegarLoop]: Abstraction has 1376 states and 1618 transitions. [2020-09-25 12:24:59,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:24:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1618 transitions. [2020-09-25 12:24:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-25 12:24:59,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:59,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:24:59,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:24:59,599 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -45953022, now seen corresponding path program 1 times [2020-09-25 12:24:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:59,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638435938] [2020-09-25 12:24:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:59,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:59,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:02,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:02,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:04,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:25:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-25 12:25:04,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 12:25:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 12:25:04,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:25:04,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:25:04,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 12:25:04,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-25 12:25:04,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-09-25 12:25:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 12:25:04,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:25:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:25:04,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:04,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:25:04,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:25:04,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:25:04,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 12:25:04,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:25:04,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:25:04,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:25:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:25:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:25:04,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:25:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:25:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:25:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:05,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:25:05,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 12:25:05,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:25:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 12:25:05,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:25:05,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:25:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:25:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:25:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:25:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:25:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 12:25:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:25:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:05,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:05,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:25:05,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 12:25:05,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:25:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-25 12:25:05,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:25:05,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:25:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:25:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:25:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 12:25:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:25:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 59 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 12:25:05,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638435938] [2020-09-25 12:25:05,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:25:05,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 12:25:05,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615364641] [2020-09-25 12:25:05,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 12:25:05,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:25:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 12:25:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:25:05,613 INFO L87 Difference]: Start difference. First operand 1376 states and 1618 transitions. Second operand 12 states. [2020-09-25 12:25:06,254 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-09-25 12:25:07,551 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-09-25 12:25:09,932 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-09-25 12:25:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:25:10,620 INFO L93 Difference]: Finished difference Result 3947 states and 4990 transitions. [2020-09-25 12:25:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 12:25:10,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 206 [2020-09-25 12:25:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:25:10,633 INFO L225 Difference]: With dead ends: 3947 [2020-09-25 12:25:10,634 INFO L226 Difference]: Without dead ends: 1970 [2020-09-25 12:25:10,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-09-25 12:25:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2020-09-25 12:25:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1920. [2020-09-25 12:25:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1920 states. [2020-09-25 12:25:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 2207 transitions. [2020-09-25 12:25:10,714 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 2207 transitions. Word has length 206 [2020-09-25 12:25:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:25:10,714 INFO L479 AbstractCegarLoop]: Abstraction has 1920 states and 2207 transitions. [2020-09-25 12:25:10,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 12:25:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 2207 transitions. [2020-09-25 12:25:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-25 12:25:10,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:25:10,723 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:25:10,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:25:10,724 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:25:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:25:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1149922668, now seen corresponding path program 1 times [2020-09-25 12:25:10,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:25:10,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292050409] [2020-09-25 12:25:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:25:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:25:10,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:12,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:25:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking...