/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:04:25,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:04:25,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:04:25,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:04:25,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:04:25,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:04:25,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:04:25,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:04:25,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:04:25,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:04:25,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:04:25,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:04:25,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:04:25,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:04:25,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:04:25,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:04:25,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:04:25,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:04:25,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:04:25,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:04:25,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:04:25,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:04:25,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:04:25,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:04:25,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:04:25,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:04:25,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:04:25,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:04:25,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:04:25,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:04:25,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:04:25,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:04:25,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:04:25,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:04:25,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:04:25,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:04:25,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:04:25,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:04:25,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:04:25,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:04:25,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:04:25,886 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 09:04:25,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:04:25,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:04:25,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:04:25,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:04:25,916 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:04:25,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:04:25,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:04:25,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:04:25,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:04:25,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:04:25,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:04:25,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:04:25,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:04:25,917 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:04:25,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:04:25,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:04:25,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:04:25,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:04:25,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:04:25,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:04:25,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:04:25,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:04:25,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:04:25,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:04:25,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:04:25,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:04:25,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:04:25,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:04:25,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:04:25,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:04:26,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:04:26,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:04:26,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:04:26,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:04:26,394 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:04:26,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label57.c [2020-09-25 09:04:26,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/124414edb/3c4aa53461a2460cb189656ba8c4db17/FLAG1547bbe71 [2020-09-25 09:04:27,127 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:04:27,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label57.c [2020-09-25 09:04:27,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/124414edb/3c4aa53461a2460cb189656ba8c4db17/FLAG1547bbe71 [2020-09-25 09:04:27,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/124414edb/3c4aa53461a2460cb189656ba8c4db17 [2020-09-25 09:04:27,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:04:27,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:04:27,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:04:27,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:04:27,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:04:27,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:04:27" (1/1) ... [2020-09-25 09:04:27,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88af870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:27, skipping insertion in model container [2020-09-25 09:04:27,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:04:27" (1/1) ... [2020-09-25 09:04:27,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:04:27,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:04:27,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:04:27,888 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:04:28,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:04:28,145 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:04:28,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28 WrapperNode [2020-09-25 09:04:28,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:04:28,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:04:28,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:04:28,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:04:28,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (1/1) ... [2020-09-25 09:04:28,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:04:28,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:04:28,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:04:28,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:04:28,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (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 09:04:28,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:04:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:04:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:04:28,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:04:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:04:28,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:04:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:04:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:04:28,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:04:28,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:04:28,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:04:30,126 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:04:30,126 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:04:30,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:04:30 BoogieIcfgContainer [2020-09-25 09:04:30,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:04:30,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:04:30,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:04:30,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:04:30,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:04:27" (1/3) ... [2020-09-25 09:04:30,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de41d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:04:30, skipping insertion in model container [2020-09-25 09:04:30,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:04:28" (2/3) ... [2020-09-25 09:04:30,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73de41d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:04:30, skipping insertion in model container [2020-09-25 09:04:30,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:04:30" (3/3) ... [2020-09-25 09:04:30,146 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label57.c [2020-09-25 09:04:30,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:04:30,171 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:04:30,195 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:04:30,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:04:30,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:04:30,229 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:04:30,229 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:04:30,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:04:30,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:04:30,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:04:30,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:04:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 09:04:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-25 09:04:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:30,287 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] [2020-09-25 09:04:30,287 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:30,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:30,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1788019222, now seen corresponding path program 1 times [2020-09-25 09:04:30,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:30,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34633945] [2020-09-25 09:04:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:31,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:32,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:35,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:35,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:35,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-25 09:04:35,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:04:35,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 09:04:35,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:35,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-25 09:04:35,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:04:35,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:35,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:35,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:35,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:35,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 09:04:35,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:35,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:35,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:04:35,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:35,909 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 09:04:35,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34633945] [2020-09-25 09:04:35,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:04:35,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:04:35,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409843795] [2020-09-25 09:04:35,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:04:35,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:04:35,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:04:35,944 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 09:04:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:38,466 INFO L93 Difference]: Finished difference Result 1396 states and 1850 transitions. [2020-09-25 09:04:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:04:38,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-09-25 09:04:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:38,497 INFO L225 Difference]: With dead ends: 1396 [2020-09-25 09:04:38,497 INFO L226 Difference]: Without dead ends: 788 [2020-09-25 09:04:38,509 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 09:04:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-09-25 09:04:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2020-09-25 09:04:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-09-25 09:04:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 813 transitions. [2020-09-25 09:04:38,650 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 813 transitions. Word has length 117 [2020-09-25 09:04:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:38,651 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 813 transitions. [2020-09-25 09:04:38,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:04:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 813 transitions. [2020-09-25 09:04:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 09:04:38,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:38,670 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] [2020-09-25 09:04:38,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:04:38,671 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash -890048490, now seen corresponding path program 1 times [2020-09-25 09:04:38,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:38,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348095507] [2020-09-25 09:04:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:38,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:39,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:40,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:43,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:43,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-09-25 09:04:43,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:04:43,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 09:04:43,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:43,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:43,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:04:43,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 09:04:43,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 09:04:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:04:43,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:44,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:44,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:44,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:44,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 09:04:44,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:44,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:44,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 09:04:44,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:44,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:44,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:44,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:44,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:04:44,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:04:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 09:04:44,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:44,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:04:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:04:44,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:04:44,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348095507] [2020-09-25 09:04:44,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:44,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:04:44,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656088524] [2020-09-25 09:04:44,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:04:44,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:04:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:04:44,162 INFO L87 Difference]: Start difference. First operand 665 states and 813 transitions. Second operand 6 states. [2020-09-25 09:04:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:45,908 INFO L93 Difference]: Finished difference Result 1650 states and 2133 transitions. [2020-09-25 09:04:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:04:45,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-09-25 09:04:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:45,918 INFO L225 Difference]: With dead ends: 1650 [2020-09-25 09:04:45,918 INFO L226 Difference]: Without dead ends: 1007 [2020-09-25 09:04:45,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:04:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-09-25 09:04:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 975. [2020-09-25 09:04:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2020-09-25 09:04:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1228 transitions. [2020-09-25 09:04:45,969 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1228 transitions. Word has length 135 [2020-09-25 09:04:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:45,970 INFO L479 AbstractCegarLoop]: Abstraction has 975 states and 1228 transitions. [2020-09-25 09:04:45,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:04:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1228 transitions. [2020-09-25 09:04:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 09:04:45,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:45,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:04:45,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:04:45,976 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -334312447, now seen corresponding path program 1 times [2020-09-25 09:04:45,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:45,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060917605] [2020-09-25 09:04:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:46,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:46,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:46,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:51,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:51,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 09:04:51,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:04:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 09:04:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:51,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:04:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 09:04:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-09-25 09:04:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:51,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:51,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:51,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 09:04:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:51,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:04:51,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:51,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:04:51,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:04:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-25 09:04:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:51,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:04:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 09:04:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:04:51,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060917605] [2020-09-25 09:04:51,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:51,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:04:51,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731272325] [2020-09-25 09:04:51,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:04:51,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:51,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:04:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:04:51,490 INFO L87 Difference]: Start difference. First operand 975 states and 1228 transitions. Second operand 7 states. [2020-09-25 09:04:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:04:54,045 INFO L93 Difference]: Finished difference Result 2813 states and 3722 transitions. [2020-09-25 09:04:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:04:54,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2020-09-25 09:04:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:04:54,064 INFO L225 Difference]: With dead ends: 2813 [2020-09-25 09:04:54,065 INFO L226 Difference]: Without dead ends: 1860 [2020-09-25 09:04:54,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:04:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-09-25 09:04:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1755. [2020-09-25 09:04:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1755 states. [2020-09-25 09:04:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2240 transitions. [2020-09-25 09:04:54,173 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2240 transitions. Word has length 161 [2020-09-25 09:04:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:04:54,175 INFO L479 AbstractCegarLoop]: Abstraction has 1755 states and 2240 transitions. [2020-09-25 09:04:54,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:04:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2240 transitions. [2020-09-25 09:04:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 09:04:54,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:04:54,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:54,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:04:54,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:04:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:04:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1304518793, now seen corresponding path program 1 times [2020-09-25 09:04:54,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:04:54,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152496278] [2020-09-25 09:04:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:04:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:54,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:57,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:59,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:59,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-25 09:04:59,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:04:59,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-25 09:04:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:04:59,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:04:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:59,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:59,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:59,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:04:59,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:04:59,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:59,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:59,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:04:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:59,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:04:59,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:04:59,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:04:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:59,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:59,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:59,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:04:59,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:59,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:04:59,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:59,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:59,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:04:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:59,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:04:59,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:59,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 09:04:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:04:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:04:59,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:04:59,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:04:59,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:04:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 09:04:59,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:04:59,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:04:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:04:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:04:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 09:04:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:04:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:04:59,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152496278] [2020-09-25 09:04:59,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:04:59,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:04:59,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040004666] [2020-09-25 09:04:59,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:04:59,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:04:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:04:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:04:59,569 INFO L87 Difference]: Start difference. First operand 1755 states and 2240 transitions. Second operand 5 states. [2020-09-25 09:05:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:05:01,659 INFO L93 Difference]: Finished difference Result 4225 states and 5551 transitions. [2020-09-25 09:05:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:05:01,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-09-25 09:05:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:05:01,678 INFO L225 Difference]: With dead ends: 4225 [2020-09-25 09:05:01,678 INFO L226 Difference]: Without dead ends: 2492 [2020-09-25 09:05:01,685 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 09:05:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-25 09:05:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2364. [2020-09-25 09:05:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2020-09-25 09:05:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3088 transitions. [2020-09-25 09:05:01,790 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3088 transitions. Word has length 173 [2020-09-25 09:05:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:05:01,791 INFO L479 AbstractCegarLoop]: Abstraction has 2364 states and 3088 transitions. [2020-09-25 09:05:01,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:05:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3088 transitions. [2020-09-25 09:05:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-25 09:05:01,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:05:01,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:05:01,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:05:01,806 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:05:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:05:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash 966208557, now seen corresponding path program 1 times [2020-09-25 09:05:01,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:05:01,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89531549] [2020-09-25 09:05:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:05:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:01,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:02,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:04,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:06,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-09-25 09:05:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 09:05:06,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:05:06,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:05:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:06,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:06,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:06,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:05:06,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:05:06,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 09:05:06,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:06,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:05:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:05:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:05:06,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:05:06,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:05:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:06,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:06,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:05:06,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:05:06,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:05:06,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:06,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:06,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:05:06,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:05:06,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:05:06,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:05:06,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 09:05:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:07,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:05:07,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 09:05:07,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:05:07,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 09:05:07,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:05:07,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:05:07,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:05:07,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:05:07,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 09:05:07,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:05:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 09:05:07,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89531549] [2020-09-25 09:05:07,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:05:07,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:05:07,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133493158] [2020-09-25 09:05:07,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:05:07,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:05:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:05:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:05:07,124 INFO L87 Difference]: Start difference. First operand 2364 states and 3088 transitions. Second operand 5 states. [2020-09-25 09:05:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:05:09,082 INFO L93 Difference]: Finished difference Result 6250 states and 8514 transitions. [2020-09-25 09:05:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:05:09,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-09-25 09:05:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:05:09,107 INFO L225 Difference]: With dead ends: 6250 [2020-09-25 09:05:09,107 INFO L226 Difference]: Without dead ends: 3908 [2020-09-25 09:05:09,118 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 09:05:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2020-09-25 09:05:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3888. [2020-09-25 09:05:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3888 states. [2020-09-25 09:05:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 5100 transitions. [2020-09-25 09:05:09,287 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 5100 transitions. Word has length 179 [2020-09-25 09:05:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:05:09,288 INFO L479 AbstractCegarLoop]: Abstraction has 3888 states and 5100 transitions. [2020-09-25 09:05:09,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:05:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 5100 transitions. [2020-09-25 09:05:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-25 09:05:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:05:09,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:09,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:05:09,304 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:05:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:05:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash -936584615, now seen corresponding path program 1 times [2020-09-25 09:05:09,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:05:09,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702927059] [2020-09-25 09:05:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:05:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:05:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:09,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:10,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:05:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking...