/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:18:02,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:18:02,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:18:02,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:18:02,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:18:02,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:18:02,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:18:02,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:18:02,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:18:02,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:18:02,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:18:02,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:18:02,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:18:02,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:18:02,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:18:02,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:18:02,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:18:02,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:18:02,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:18:02,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:18:02,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:18:02,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:18:02,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:18:02,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:18:02,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:18:02,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:18:02,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:18:02,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:18:02,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:18:02,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:18:02,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:18:02,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:18:02,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:18:02,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:18:02,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:18:02,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:18:02,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:18:02,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:18:02,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:18:02,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:18:02,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:18:02,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:18:03,015 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:18:03,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:18:03,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:18:03,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:18:03,018 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:18:03,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:18:03,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:18:03,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:18:03,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:18:03,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:18:03,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:18:03,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:18:03,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:18:03,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:18:03,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:18:03,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:18:03,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:18:03,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:18:03,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:18:03,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:18:03,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:18:03,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:18:03,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:18:03,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:18:03,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:18:03,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:18:03,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:18:03,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:18:03,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:18:03,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:18:03,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:18:03,484 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:18:03,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:18:03,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:18:03,491 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:18:03,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label58.c [2020-09-25 11:18:03,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6eed713e/40e8517dd24f4fb799fd1e10f6655732/FLAGfdbd04bba [2020-09-25 11:18:04,245 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:18:04,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label58.c [2020-09-25 11:18:04,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6eed713e/40e8517dd24f4fb799fd1e10f6655732/FLAGfdbd04bba [2020-09-25 11:18:04,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6eed713e/40e8517dd24f4fb799fd1e10f6655732 [2020-09-25 11:18:04,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:18:04,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:18:04,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:18:04,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:18:04,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:18:04,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:18:04" (1/1) ... [2020-09-25 11:18:04,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3666d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:04, skipping insertion in model container [2020-09-25 11:18:04,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:18:04" (1/1) ... [2020-09-25 11:18:04,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:18:04,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:18:05,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:18:05,041 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:18:05,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:18:05,282 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:18:05,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05 WrapperNode [2020-09-25 11:18:05,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:18:05,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:18:05,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:18:05,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:18:05,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... [2020-09-25 11:18:05,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:18:05,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:18:05,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:18:05,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:18:05,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:18:05,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:18:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:18:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:18:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:18:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:18:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:18:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:18:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:18:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:18:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:18:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:18:06,917 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:18:06,918 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:18:06,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:18:06 BoogieIcfgContainer [2020-09-25 11:18:06,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:18:06,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:18:06,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:18:06,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:18:06,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:18:04" (1/3) ... [2020-09-25 11:18:06,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a6de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:18:06, skipping insertion in model container [2020-09-25 11:18:06,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:05" (2/3) ... [2020-09-25 11:18:06,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a6de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:18:06, skipping insertion in model container [2020-09-25 11:18:06,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:18:06" (3/3) ... [2020-09-25 11:18:06,938 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label58.c [2020-09-25 11:18:06,951 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:18:06,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:18:06,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:18:07,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:18:07,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:18:07,032 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:18:07,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:18:07,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:18:07,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:18:07,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:18:07,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:18:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:18:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-25 11:18:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:07,090 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] [2020-09-25 11:18:07,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1064851622, now seen corresponding path program 1 times [2020-09-25 11:18:07,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:07,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606475125] [2020-09-25 11:18:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:08,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:12,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:12,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-25 11:18:12,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:18:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-25 11:18:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:12,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:18:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:18:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 11:18:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:18:12,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:12,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:12,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:18:12,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:12,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:18:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:18:12,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:18:12,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606475125] [2020-09-25 11:18:12,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:18:12,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:18:12,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051603733] [2020-09-25 11:18:12,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:18:12,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:18:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:18:12,761 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:18:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:15,106 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-09-25 11:18:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:18:15,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-09-25 11:18:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:15,135 INFO L225 Difference]: With dead ends: 1386 [2020-09-25 11:18:15,136 INFO L226 Difference]: Without dead ends: 787 [2020-09-25 11:18:15,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:18:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-09-25 11:18:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 733. [2020-09-25 11:18:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-09-25 11:18:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 884 transitions. [2020-09-25 11:18:15,288 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 884 transitions. Word has length 129 [2020-09-25 11:18:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:15,289 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 884 transitions. [2020-09-25 11:18:15,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:18:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 884 transitions. [2020-09-25 11:18:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-25 11:18:15,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:15,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:18:15,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:18:15,310 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1321748602, now seen corresponding path program 1 times [2020-09-25 11:18:15,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:15,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628701119] [2020-09-25 11:18:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:15,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:18,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:18,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:18,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:19,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:19,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:20,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:20,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 11:18:20,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:18:20,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 11:18:20,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:20,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:18:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:18:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 11:18:20,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:20,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:20,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:20,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:20,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:20,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:18:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:20,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:20,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:18:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:20,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:20,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:18:20,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:18:20,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:20,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:18:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:18:20,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:18:20,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628701119] [2020-09-25 11:18:20,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:18:20,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:18:20,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889122221] [2020-09-25 11:18:20,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:18:20,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:18:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:18:20,597 INFO L87 Difference]: Start difference. First operand 733 states and 884 transitions. Second operand 5 states. [2020-09-25 11:18:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:22,733 INFO L93 Difference]: Finished difference Result 1806 states and 2276 transitions. [2020-09-25 11:18:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:18:22,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-09-25 11:18:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:22,743 INFO L225 Difference]: With dead ends: 1806 [2020-09-25 11:18:22,744 INFO L226 Difference]: Without dead ends: 1095 [2020-09-25 11:18:22,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:18:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2020-09-25 11:18:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1039. [2020-09-25 11:18:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2020-09-25 11:18:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1246 transitions. [2020-09-25 11:18:22,795 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1246 transitions. Word has length 147 [2020-09-25 11:18:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:22,796 INFO L479 AbstractCegarLoop]: Abstraction has 1039 states and 1246 transitions. [2020-09-25 11:18:22,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:18:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1246 transitions. [2020-09-25 11:18:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 11:18:22,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:22,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:18:22,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:18:22,802 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2057686971, now seen corresponding path program 1 times [2020-09-25 11:18:22,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:22,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003700977] [2020-09-25 11:18:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:22,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:23,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:24,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:27,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:27,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:27,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:27,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 11:18:27,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:18:27,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 11:18:27,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:27,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:18:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 11:18:27,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 11:18:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:18:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:27,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:27,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:27,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:27,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:18:27,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:27,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:27,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:28,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:18:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:28,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:28,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 11:18:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 11:18:28,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:28,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:18:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 11:18:28,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:18:28,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003700977] [2020-09-25 11:18:28,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:18:28,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:18:28,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984087452] [2020-09-25 11:18:28,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:18:28,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:18:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:18:28,159 INFO L87 Difference]: Start difference. First operand 1039 states and 1246 transitions. Second operand 6 states. [2020-09-25 11:18:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:30,687 INFO L93 Difference]: Finished difference Result 2744 states and 3507 transitions. [2020-09-25 11:18:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:18:30,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2020-09-25 11:18:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:30,708 INFO L225 Difference]: With dead ends: 2744 [2020-09-25 11:18:30,708 INFO L226 Difference]: Without dead ends: 1727 [2020-09-25 11:18:30,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:18:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2020-09-25 11:18:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1651. [2020-09-25 11:18:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1651 states. [2020-09-25 11:18:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2036 transitions. [2020-09-25 11:18:30,788 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2036 transitions. Word has length 153 [2020-09-25 11:18:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:30,789 INFO L479 AbstractCegarLoop]: Abstraction has 1651 states and 2036 transitions. [2020-09-25 11:18:30,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:18:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2036 transitions. [2020-09-25 11:18:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-25 11:18:30,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:30,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:18:30,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:18:30,798 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -353718439, now seen corresponding path program 1 times [2020-09-25 11:18:30,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:30,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286353760] [2020-09-25 11:18:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:30,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:31,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:31,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:35,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:35,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 11:18:35,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:18:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-09-25 11:18:35,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:35,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:18:35,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-09-25 11:18:35,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 11:18:35,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:18:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:36,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:36,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:36,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:36,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:36,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:18:36,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:36,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:36,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:36,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:36,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:18:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:36,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:36,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 11:18:36,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:36,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 11:18:36,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:36,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:36,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 11:18:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:36,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:36,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:18:36,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:36,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 11:18:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:36,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:18:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:36,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 11:18:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 11:18:36,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286353760] [2020-09-25 11:18:36,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:18:36,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:18:36,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101442000] [2020-09-25 11:18:36,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:18:36,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:18:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:18:36,606 INFO L87 Difference]: Start difference. First operand 1651 states and 2036 transitions. Second operand 14 states. [2020-09-25 11:18:37,595 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-09-25 11:18:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:18:41,471 INFO L93 Difference]: Finished difference Result 4700 states and 6088 transitions. [2020-09-25 11:18:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:18:41,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 175 [2020-09-25 11:18:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:18:41,497 INFO L225 Difference]: With dead ends: 4700 [2020-09-25 11:18:41,497 INFO L226 Difference]: Without dead ends: 3071 [2020-09-25 11:18:41,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:18:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2020-09-25 11:18:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3045. [2020-09-25 11:18:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3045 states. [2020-09-25 11:18:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 3609 transitions. [2020-09-25 11:18:41,620 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 3609 transitions. Word has length 175 [2020-09-25 11:18:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:18:41,621 INFO L479 AbstractCegarLoop]: Abstraction has 3045 states and 3609 transitions. [2020-09-25 11:18:41,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:18:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 3609 transitions. [2020-09-25 11:18:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-25 11:18:41,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:18:41,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 11:18:41,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:18:41,634 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:18:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:18:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash 782213054, now seen corresponding path program 1 times [2020-09-25 11:18:41,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:18:41,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158966055] [2020-09-25 11:18:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:18:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:46,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:46,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-09-25 11:18:46,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:18:46,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 11:18:46,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:46,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:46,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:18:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-09-25 11:18:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-25 11:18:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:47,228 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-09-25 11:18:47,356 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-09-25 11:18:47,545 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2020-09-25 11:18:47,711 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2020-09-25 11:18:47,859 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2020-09-25 11:18:48,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:18:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:48,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:48,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:18:48,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:48,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 11:18:48,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:48,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:48,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:48,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:48,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:18:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:18:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:48,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:48,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 11:18:48,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:48,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 11:18:48,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:48,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:18:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:48,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-25 11:18:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:18:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:18:48,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:18:48,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 11:18:48,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:18:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 11:18:48,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:18:48,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:18:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:18:48,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:18:48,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 11:18:48,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:18:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-25 11:18:48,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158966055] [2020-09-25 11:18:48,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:18:48,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:18:48,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252174873] [2020-09-25 11:18:48,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:18:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:18:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:18:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:18:48,640 INFO L87 Difference]: Start difference. First operand 3045 states and 3609 transitions. Second operand 14 states. [2020-09-25 11:18:50,991 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-25 11:18:51,176 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 89