/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:29:39,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:29:39,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:29:39,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:29:39,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:29:39,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:29:39,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:29:39,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:29:39,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:29:39,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:29:39,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:29:39,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:29:39,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:29:39,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:29:39,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:29:39,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:29:39,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:29:39,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:29:39,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:29:39,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:29:39,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:29:39,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:29:39,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:29:39,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:29:39,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:29:39,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:29:39,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:29:39,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:29:39,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:29:39,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:29:39,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:29:39,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:29:39,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:29:39,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:29:39,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:29:39,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:29:39,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:29:39,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:29:39,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:29:39,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:29:39,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:29:39,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 13:29:39,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:29:39,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:29:39,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:29:39,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:29:39,328 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:29:39,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:29:39,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:29:39,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:29:39,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:29:39,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:29:39,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:29:39,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:29:39,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:29:39,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:29:39,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:29:39,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:29:39,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:29:39,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:29:39,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:29:39,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:29:39,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:29:39,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:29:39,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:29:39,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:29:39,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:29:39,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:29:39,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:29:39,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:29:39,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:29:39,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:29:39,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:29:39,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:29:39,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:29:39,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:29:39,904 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:29:39,905 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 13:29:39,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d48ee3ce4/a6fa738cfd394cf49fab98bed6ee1a53/FLAG91fa6464c [2020-09-25 13:29:40,646 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:29:40,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label39.c [2020-09-25 13:29:40,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d48ee3ce4/a6fa738cfd394cf49fab98bed6ee1a53/FLAG91fa6464c [2020-09-25 13:29:40,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d48ee3ce4/a6fa738cfd394cf49fab98bed6ee1a53 [2020-09-25 13:29:40,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:29:40,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:29:40,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:29:40,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:29:40,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:29:40,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:29:40" (1/1) ... [2020-09-25 13:29:40,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:40, skipping insertion in model container [2020-09-25 13:29:40,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:29:40" (1/1) ... [2020-09-25 13:29:40,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:29:40,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:29:41,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:29:41,594 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:29:41,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:29:41,820 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:29:41,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41 WrapperNode [2020-09-25 13:29:41,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:29:41,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:29:41,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:29:41,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:29:41,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... [2020-09-25 13:29:41,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:29:41,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:29:41,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:29:41,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:29:41,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:29:42,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:29:42,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:29:42,068 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 13:29:42,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:29:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 13:29:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:29:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:29:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:29:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:29:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:29:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:29:43,462 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:29:43,462 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:29:43,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:29:43 BoogieIcfgContainer [2020-09-25 13:29:43,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:29:43,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:29:43,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:29:43,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:29:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:29:40" (1/3) ... [2020-09-25 13:29:43,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:29:43, skipping insertion in model container [2020-09-25 13:29:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:41" (2/3) ... [2020-09-25 13:29:43,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:29:43, skipping insertion in model container [2020-09-25 13:29:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:29:43" (3/3) ... [2020-09-25 13:29:43,483 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label39.c [2020-09-25 13:29:43,495 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:29:43,507 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:29:43,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:29:43,571 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:29:43,571 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:29:43,572 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:29:43,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:29:43,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:29:43,572 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:29:43,572 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:29:43,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:29:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 13:29:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 13:29:43,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:43,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:29:43,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2068005297, now seen corresponding path program 1 times [2020-09-25 13:29:43,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:43,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-25 13:29:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:44,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:48,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:48,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-25 13:29:48,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 13:29:48,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:29:48,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:48,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:29:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 13:29:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-09-25 13:29:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:29:49,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:49,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:49,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:49,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:49,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 13:29:49,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:49,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:49,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:49,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 13:29:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:49,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-25 13:29:49,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:29:49,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:29:49,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87351341] [2020-09-25 13:29:49,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:49,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:49,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:49,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:49,369 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-25 13:29:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:52,160 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-25 13:29:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 13:29:52,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-09-25 13:29:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:52,218 INFO L225 Difference]: With dead ends: 1360 [2020-09-25 13:29:52,218 INFO L226 Difference]: Without dead ends: 781 [2020-09-25 13:29:52,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:29:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-25 13:29:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-25 13:29:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-25 13:29:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-25 13:29:52,382 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 160 [2020-09-25 13:29:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:52,383 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-25 13:29:52,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-25 13:29:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 13:29:52,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:52,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:29:52,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:29:52,392 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:52,393 INFO L82 PathProgramCache]: Analyzing trace with hash -32611680, now seen corresponding path program 1 times [2020-09-25 13:29:52,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:52,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436339602] [2020-09-25 13:29:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:52,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:55,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:56,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:57,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:57,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 13:29:57,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:29:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 13:29:57,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:57,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:29:57,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 13:29:57,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 13:29:57,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:57,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:57,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:57,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:29:57,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:57,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:57,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:57,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:57,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:57,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:57,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 13:29:57,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-25 13:29:57,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:57,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:29:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:29:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436339602] [2020-09-25 13:29:58,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:58,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:29:58,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760518898] [2020-09-25 13:29:58,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:29:58,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:29:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:29:58,078 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 9 states. [2020-09-25 13:30:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:30:03,399 INFO L93 Difference]: Finished difference Result 2190 states and 2898 transitions. [2020-09-25 13:30:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:30:03,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 181 [2020-09-25 13:30:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:30:03,412 INFO L225 Difference]: With dead ends: 2190 [2020-09-25 13:30:03,412 INFO L226 Difference]: Without dead ends: 1030 [2020-09-25 13:30:03,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 13:30:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-09-25 13:30:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1003. [2020-09-25 13:30:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-09-25 13:30:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1169 transitions. [2020-09-25 13:30:03,475 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1169 transitions. Word has length 181 [2020-09-25 13:30:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:30:03,476 INFO L479 AbstractCegarLoop]: Abstraction has 1003 states and 1169 transitions. [2020-09-25 13:30:03,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:30:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1169 transitions. [2020-09-25 13:30:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-25 13:30:03,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:30:03,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:30:03,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:30:03,487 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:30:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:30:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1214079671, now seen corresponding path program 1 times [2020-09-25 13:30:03,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:30:03,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406827262] [2020-09-25 13:30:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:30:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:03,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:03,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:03,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:04,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:05,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:08,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:08,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-09-25 13:30:08,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:30:08,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:30:08,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:08,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:30:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 13:30:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 13:30:08,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:30:08,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:30:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:08,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:08,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:30:08,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:08,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:30:08,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:08,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:30:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:30:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:30:08,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:30:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:08,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:08,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 13:30:08,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:08,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 13:30:08,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:08,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:30:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 13:30:08,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:30:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:30:08,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406827262] [2020-09-25 13:30:08,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:30:08,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:30:08,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819036092] [2020-09-25 13:30:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:30:08,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:30:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:30:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:30:08,804 INFO L87 Difference]: Start difference. First operand 1003 states and 1169 transitions. Second operand 5 states. [2020-09-25 13:30:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:30:11,042 INFO L93 Difference]: Finished difference Result 2649 states and 3191 transitions. [2020-09-25 13:30:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:30:11,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2020-09-25 13:30:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:30:11,058 INFO L225 Difference]: With dead ends: 2649 [2020-09-25 13:30:11,059 INFO L226 Difference]: Without dead ends: 1513 [2020-09-25 13:30:11,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:30:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2020-09-25 13:30:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1277. [2020-09-25 13:30:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-09-25 13:30:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1519 transitions. [2020-09-25 13:30:11,123 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1519 transitions. Word has length 185 [2020-09-25 13:30:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:30:11,125 INFO L479 AbstractCegarLoop]: Abstraction has 1277 states and 1519 transitions. [2020-09-25 13:30:11,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:30:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1519 transitions. [2020-09-25 13:30:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-25 13:30:11,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:30:11,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:30:11,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:30:11,143 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:30:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:30:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -755339745, now seen corresponding path program 1 times [2020-09-25 13:30:11,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:30:11,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483817436] [2020-09-25 13:30:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:30:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:11,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:11,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:14,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:15,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:16,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:16,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 13:30:16,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 13:30:16,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 13:30:16,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:16,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:30:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-25 13:30:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-09-25 13:30:16,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:30:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:30:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:16,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:30:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:30:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:30:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:30:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:16,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:16,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 13:30:16,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 13:30:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:30:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:30:16,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483817436] [2020-09-25 13:30:16,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:30:16,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:30:16,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718112486] [2020-09-25 13:30:16,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:30:16,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:30:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:30:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:30:16,414 INFO L87 Difference]: Start difference. First operand 1277 states and 1519 transitions. Second operand 5 states. [2020-09-25 13:30:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:30:18,123 INFO L93 Difference]: Finished difference Result 3205 states and 3935 transitions. [2020-09-25 13:30:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:30:18,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 188 [2020-09-25 13:30:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:30:18,138 INFO L225 Difference]: With dead ends: 3205 [2020-09-25 13:30:18,139 INFO L226 Difference]: Without dead ends: 1952 [2020-09-25 13:30:18,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:30:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2020-09-25 13:30:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1851. [2020-09-25 13:30:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-09-25 13:30:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2241 transitions. [2020-09-25 13:30:18,223 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2241 transitions. Word has length 188 [2020-09-25 13:30:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:30:18,224 INFO L479 AbstractCegarLoop]: Abstraction has 1851 states and 2241 transitions. [2020-09-25 13:30:18,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:30:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2241 transitions. [2020-09-25 13:30:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-25 13:30:18,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:30:18,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:30:18,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:30:18,234 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:30:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:30:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1232404641, now seen corresponding path program 1 times [2020-09-25 13:30:18,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:30:18,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402492893] [2020-09-25 13:30:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:30:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:18,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:21,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:21,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:23,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:23,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-09-25 13:30:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:30:23,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 13:30:23,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:23,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 13:30:23,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-09-25 13:30:23,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 13:30:23,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 13:30:23,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:30:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:23,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:23,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:23,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:30:23,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:23,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:30:23,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:23,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:23,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:30:23,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:23,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:30:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:30:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:30:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:24,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 13:30:24,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 13:30:24,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:24,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:24,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:30:24,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:24,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:30:24,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:30:24,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 13:30:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:30:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:30:24,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:30:24,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 13:30:24,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 13:30:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:30:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 13:30:24,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402492893] [2020-09-25 13:30:24,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:30:24,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 13:30:24,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679877310] [2020-09-25 13:30:24,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 13:30:24,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:30:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 13:30:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-25 13:30:24,298 INFO L87 Difference]: Start difference. First operand 1851 states and 2241 transitions. Second operand 16 states. [2020-09-25 13:30:25,931 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-25 13:30:26,641 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-25 13:30:27,075 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-09-25 13:30:27,601 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-09-25 13:30:27,869 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-09-25 13:30:28,509 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 13:30:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:30:29,347 INFO L93 Difference]: Finished difference Result 4079 states and 5012 transitions. [2020-09-25 13:30:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 13:30:29,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2020-09-25 13:30:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:30:29,353 INFO L225 Difference]: With dead ends: 4079 [2020-09-25 13:30:29,353 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 13:30:29,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-25 13:30:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 13:30:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 13:30:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 13:30:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 13:30:29,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2020-09-25 13:30:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:30:29,366 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 13:30:29,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 13:30:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 13:30:29,366 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 13:30:29,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:30:29,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.