/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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:16:37,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:16:37,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:16:37,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:16:37,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:16:37,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:16:37,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:16:37,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:16:37,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:16:37,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:16:37,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:16:37,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:16:37,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:16:37,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:16:37,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:16:37,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:16:37,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:16:37,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:16:37,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:16:37,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:16:37,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:16:37,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:16:37,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:16:37,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:16:37,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:16:37,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:16:37,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:16:37,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:16:37,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:16:37,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:16:37,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:16:37,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:16:37,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:16:37,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:16:37,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:16:37,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:16:37,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:16:37,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:16:37,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:16:37,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:16:37,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:16:37,902 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 11:16:37,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:16:37,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:16:37,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:16:37,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:16:37,956 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:16:37,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:16:37,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:16:37,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:16:37,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:16:37,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:16:37,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:16:37,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:16:37,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:16:37,960 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:16:37,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:16:37,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:16:37,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:16:37,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:16:37,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:16:37,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:16:37,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:16:37,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:16:37,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:16:37,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:16:37,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:16:37,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:16:37,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:16:37,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:16:37,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:16:37,964 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 11:16:38,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:16:38,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:16:38,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:16:38,469 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:16:38,470 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:16:38,471 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-25 11:16:38,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6a2063d2/140f811df05c498996db63dc30f3f2dc/FLAGdb18ccfa3 [2020-09-25 11:16:39,244 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:16:39,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c [2020-09-25 11:16:39,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6a2063d2/140f811df05c498996db63dc30f3f2dc/FLAGdb18ccfa3 [2020-09-25 11:16:39,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6a2063d2/140f811df05c498996db63dc30f3f2dc [2020-09-25 11:16:39,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:16:39,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:16:39,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:39,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:16:39,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:16:39,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:39" (1/1) ... [2020-09-25 11:16:39,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31051650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:39, skipping insertion in model container [2020-09-25 11:16:39,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:16:39" (1/1) ... [2020-09-25 11:16:39,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:16:39,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:16:40,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:40,148 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:16:40,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:16:40,384 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:16:40,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40 WrapperNode [2020-09-25 11:16:40,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:16:40,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:16:40,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:16:40,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:16:40,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (1/1) ... [2020-09-25 11:16:40,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:16:40,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:16:40,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:16:40,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:16:40,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (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 11:16:40,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:16:40,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:16:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:16:40,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:16:40,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:16:40,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:16:40,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:16:40,624 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:16:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:16:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:16:40,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:16:42,027 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:16:42,027 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:16:42,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:42 BoogieIcfgContainer [2020-09-25 11:16:42,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:16:42,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:16:42,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:16:42,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:16:42,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:16:39" (1/3) ... [2020-09-25 11:16:42,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6869aa14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:42, skipping insertion in model container [2020-09-25 11:16:42,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:16:40" (2/3) ... [2020-09-25 11:16:42,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6869aa14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:16:42, skipping insertion in model container [2020-09-25 11:16:42,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:16:42" (3/3) ... [2020-09-25 11:16:42,058 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label31.c [2020-09-25 11:16:42,070 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:16:42,081 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:16:42,103 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:16:42,142 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:16:42,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:16:42,143 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:16:42,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:16:42,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:16:42,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:16:42,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:16:42,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:16:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:16:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-25 11:16:42,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:42,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:42,203 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1921303583, now seen corresponding path program 1 times [2020-09-25 11:16:42,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:42,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471515523] [2020-09-25 11:16:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:42,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:43,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:44,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:46,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:47,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:47,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-25 11:16:47,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:16:47,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:16:47,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:47,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:47,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:47,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 11:16:47,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 11:16:47,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:16:47,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:47,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:47,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:47,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:47,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 11:16:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:47,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:47,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:16:47,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:47,906 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 11:16:47,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471515523] [2020-09-25 11:16:47,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:16:47,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:16:47,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756840302] [2020-09-25 11:16:47,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:16:47,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:16:47,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:16:47,946 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:16:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:50,198 INFO L93 Difference]: Finished difference Result 1206 states and 1652 transitions. [2020-09-25 11:16:50,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:16:50,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2020-09-25 11:16:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:50,240 INFO L225 Difference]: With dead ends: 1206 [2020-09-25 11:16:50,240 INFO L226 Difference]: Without dead ends: 628 [2020-09-25 11:16:50,255 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 11:16:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-09-25 11:16:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 615. [2020-09-25 11:16:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-09-25 11:16:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-09-25 11:16:50,428 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 142 [2020-09-25 11:16:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:50,432 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-09-25 11:16:50,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:16:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-09-25 11:16:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-25 11:16:50,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:50,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:50,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:16:50,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash -381885604, now seen corresponding path program 1 times [2020-09-25 11:16:50,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:50,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673273814] [2020-09-25 11:16:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:50,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:54,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:55,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:55,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:55,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-25 11:16:55,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:16:55,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:16:55,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:55,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-09-25 11:16:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-25 11:16:55,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:55,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:55,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:55,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:55,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:55,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 11:16:55,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:55,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:55,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:55,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:55,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:55,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:16:55,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:55,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 11:16:55,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:55,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:55,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:55,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:55,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:16:55,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:16:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673273814] [2020-09-25 11:16:55,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:55,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:55,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126895672] [2020-09-25 11:16:55,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:55,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:55,844 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 5 states. [2020-09-25 11:16:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:57,844 INFO L93 Difference]: Finished difference Result 1540 states and 1960 transitions. [2020-09-25 11:16:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:57,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-09-25 11:16:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:57,850 INFO L225 Difference]: With dead ends: 1540 [2020-09-25 11:16:57,850 INFO L226 Difference]: Without dead ends: 737 [2020-09-25 11:16:57,854 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 11:16:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-09-25 11:16:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 715. [2020-09-25 11:16:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-09-25 11:16:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 834 transitions. [2020-09-25 11:16:57,892 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 834 transitions. Word has length 176 [2020-09-25 11:16:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:57,893 INFO L479 AbstractCegarLoop]: Abstraction has 715 states and 834 transitions. [2020-09-25 11:16:57,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 834 transitions. [2020-09-25 11:16:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 11:16:57,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:57,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:16:57,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:16:57,902 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1267838172, now seen corresponding path program 1 times [2020-09-25 11:16:57,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:57,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464654779] [2020-09-25 11:16:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:57,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:58,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:59,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:59,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:02,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:02,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 11:17:02,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:17:02,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 11:17:02,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:02,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:02,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:17:02,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:17:02,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 11:17:02,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:03,442 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-09-25 11:17:03,572 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-09-25 11:17:03,695 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-09-25 11:17:03,830 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-09-25 11:17:04,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:04,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:17:04,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:17:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:17:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:04,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:04,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:04,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 11:17:04,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:04,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-09-25 11:17:04,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:04,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:17:04,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:04,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 11:17:04,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:17:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:04,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464654779] [2020-09-25 11:17:04,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:04,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 11:17:04,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701314095] [2020-09-25 11:17:04,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 11:17:04,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 11:17:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:17:04,807 INFO L87 Difference]: Start difference. First operand 715 states and 834 transitions. Second operand 17 states. [2020-09-25 11:17:06,689 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-09-25 11:17:08,152 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-25 11:17:08,465 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-09-25 11:17:08,855 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-25 11:17:09,295 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-09-25 11:17:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:09,704 INFO L93 Difference]: Finished difference Result 2312 states and 2849 transitions. [2020-09-25 11:17:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:17:09,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-09-25 11:17:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:09,721 INFO L225 Difference]: With dead ends: 2312 [2020-09-25 11:17:09,721 INFO L226 Difference]: Without dead ends: 1616 [2020-09-25 11:17:09,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-25 11:17:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-09-25 11:17:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1578. [2020-09-25 11:17:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-09-25 11:17:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1839 transitions. [2020-09-25 11:17:09,818 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1839 transitions. Word has length 177 [2020-09-25 11:17:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:09,819 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 1839 transitions. [2020-09-25 11:17:09,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 11:17:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1839 transitions. [2020-09-25 11:17:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-25 11:17:09,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:09,827 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, 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] [2020-09-25 11:17:09,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:17:09,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:09,828 INFO L82 PathProgramCache]: Analyzing trace with hash -144447401, now seen corresponding path program 1 times [2020-09-25 11:17:09,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:09,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687897093] [2020-09-25 11:17:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:10,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:14,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:14,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-09-25 11:17:14,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:17:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 11:17:14,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:14,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-09-25 11:17:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 11:17:14,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:15,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:15,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:15,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:15,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:15,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:17:15,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:15,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:15,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:15,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:15,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:17:15,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:15,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:17:15,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:15,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:17:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:17:15,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 11:17:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:15,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:15,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:17:15,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 11:17:15,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:15,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:17:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:17:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-25 11:17:15,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687897093] [2020-09-25 11:17:15,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:15,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:17:15,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047121531] [2020-09-25 11:17:15,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:17:15,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:15,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:17:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:17:15,615 INFO L87 Difference]: Start difference. First operand 1578 states and 1839 transitions. Second operand 8 states. [2020-09-25 11:17:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:18,184 INFO L93 Difference]: Finished difference Result 3545 states and 4229 transitions. [2020-09-25 11:17:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:17:18,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 220 [2020-09-25 11:17:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:18,193 INFO L225 Difference]: With dead ends: 3545 [2020-09-25 11:17:18,193 INFO L226 Difference]: Without dead ends: 1891 [2020-09-25 11:17:18,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:17:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-09-25 11:17:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1874. [2020-09-25 11:17:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2020-09-25 11:17:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2151 transitions. [2020-09-25 11:17:18,247 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2151 transitions. Word has length 220 [2020-09-25 11:17:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:18,248 INFO L479 AbstractCegarLoop]: Abstraction has 1874 states and 2151 transitions. [2020-09-25 11:17:18,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:17:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2151 transitions. [2020-09-25 11:17:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-25 11:17:18,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:18,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:17:18,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:17:18,257 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1386493126, now seen corresponding path program 1 times [2020-09-25 11:17:18,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:18,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936499417] [2020-09-25 11:17:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:19,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-09-25 11:17:23,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:17:23,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:17:23,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:17:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:17:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-09-25 11:17:23,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:17:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:23,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:17:23,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:17:23,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:17:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:17:23,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:17:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:23,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:23,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:17:23,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 11:17:23,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:17:23,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-09-25 11:17:23,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:17:23,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:17:23,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:17:23,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:17:23,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 11:17:23,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:17:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:17:24,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936499417] [2020-09-25 11:17:24,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:17:24,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:17:24,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138336780] [2020-09-25 11:17:24,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:17:24,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:17:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:17:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:17:24,207 INFO L87 Difference]: Start difference. First operand 1874 states and 2151 transitions. Second operand 10 states. [2020-09-25 11:17:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:17:27,723 INFO L93 Difference]: Finished difference Result 4736 states and 5597 transitions. [2020-09-25 11:17:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:17:27,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 226 [2020-09-25 11:17:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:17:27,736 INFO L225 Difference]: With dead ends: 4736 [2020-09-25 11:17:27,736 INFO L226 Difference]: Without dead ends: 1806 [2020-09-25 11:17:27,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:17:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2020-09-25 11:17:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1796. [2020-09-25 11:17:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1796 states. [2020-09-25 11:17:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2028 transitions. [2020-09-25 11:17:27,794 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2028 transitions. Word has length 226 [2020-09-25 11:17:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:17:27,794 INFO L479 AbstractCegarLoop]: Abstraction has 1796 states and 2028 transitions. [2020-09-25 11:17:27,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:17:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2028 transitions. [2020-09-25 11:17:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-09-25 11:17:27,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:17:27,802 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:17:27,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:17:27,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:17:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:17:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1801715730, now seen corresponding path program 1 times [2020-09-25 11:17:27,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:17:27,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756454456] [2020-09-25 11:17:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:17:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:17:27,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:17:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking...