/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:55:31,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:31,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:31,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:31,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:31,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:31,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:31,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:31,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:31,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:31,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:31,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:31,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:31,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:31,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:31,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:31,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:31,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:31,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:31,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:31,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:31,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:31,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:31,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:31,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:31,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:31,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:31,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:31,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:31,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:31,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:31,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:31,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:31,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:31,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:31,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:31,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:31,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:31,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:31,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:31,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:31,945 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 [2020-09-24 22:55:32,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:32,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:32,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:32,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:32,007 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:32,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:32,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:32,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:32,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:32,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:32,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:32,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:32,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:32,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:32,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:32,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:32,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:32,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:32,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:32,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:32,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:32,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:32,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:32,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:32,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:32,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:32,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:32,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:32,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:32,014 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:32,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:32,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:32,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:32,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:32,537 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:32,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 22:55:32,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db792703d/53de2b8ae5f44db6baaaea18fab09c4d/FLAGcd9ee3da4 [2020-09-24 22:55:33,202 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:33,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 22:55:33,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db792703d/53de2b8ae5f44db6baaaea18fab09c4d/FLAGcd9ee3da4 [2020-09-24 22:55:33,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db792703d/53de2b8ae5f44db6baaaea18fab09c4d [2020-09-24 22:55:33,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:33,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:33,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:33,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:33,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:33,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33, skipping insertion in model container [2020-09-24 22:55:33,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:33,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:33,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:33,830 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:33,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:33,865 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:33,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33 WrapperNode [2020-09-24 22:55:33,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:33,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:33,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:33,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:33,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (1/1) ... [2020-09-24 22:55:33,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:33,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:33,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:33,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:33,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (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 [2020-09-24 22:55:34,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:34,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:34,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 22:55:34,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:55:34,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 22:55:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:34,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:34,289 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:34,290 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 22:55:34,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:34 BoogieIcfgContainer [2020-09-24 22:55:34,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:34,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:34,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:34,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:34,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:33" (1/3) ... [2020-09-24 22:55:34,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f686fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:34, skipping insertion in model container [2020-09-24 22:55:34,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:33" (2/3) ... [2020-09-24 22:55:34,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f686fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:34, skipping insertion in model container [2020-09-24 22:55:34,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:34" (3/3) ... [2020-09-24 22:55:34,337 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-24 22:55:34,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:34,366 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:34,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:34,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:34,445 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:34,445 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:34,445 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:34,446 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:34,446 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:34,446 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:34,446 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 22:55:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 22:55:34,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:34,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:34,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-24 22:55:34,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:34,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186023336] [2020-09-24 22:55:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:34,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 22:55:34,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:34,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-09-24 22:55:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 22:55:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:34,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:55:34,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:34,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:34,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:34,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:34,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:55:34,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:34,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:34,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:34,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:34,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186023336] [2020-09-24 22:55:34,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:34,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 22:55:34,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310854598] [2020-09-24 22:55:34,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 22:55:34,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 22:55:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:55:34,909 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-24 22:55:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:34,935 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-24 22:55:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 22:55:34,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 22:55:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:34,948 INFO L225 Difference]: With dead ends: 37 [2020-09-24 22:55:34,949 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 22:55:34,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 22:55:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 22:55:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-24 22:55:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 22:55:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 22:55:35,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-24 22:55:35,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:35,002 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 22:55:35,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 22:55:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 22:55:35,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 22:55:35,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:35,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:35,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:35,004 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-24 22:55:35,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:35,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905965420] [2020-09-24 22:55:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 22:55:35,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-09-24 22:55:35,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 22:55:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:35,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 22:55:35,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:35,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:35,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:35,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905965420] [2020-09-24 22:55:35,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:35,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:55:35,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841146101] [2020-09-24 22:55:35,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:55:35,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:55:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:55:35,368 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 22:55:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:35,420 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-24 22:55:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:55:35,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 22:55:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:35,422 INFO L225 Difference]: With dead ends: 31 [2020-09-24 22:55:35,422 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 22:55:35,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:55:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 22:55:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 22:55:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 22:55:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 22:55:35,431 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-24 22:55:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:35,431 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 22:55:35,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:55:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 22:55:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 22:55:35,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:35,433 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] [2020-09-24 22:55:35,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:35,433 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-24 22:55:35,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:35,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719867090] [2020-09-24 22:55:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 22:55:35,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-24 22:55:35,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 22:55:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:36,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:36,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:36,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:36,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:36,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719867090] [2020-09-24 22:55:36,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:36,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:55:36,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441362400] [2020-09-24 22:55:36,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:55:36,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:55:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:36,101 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-24 22:55:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:36,315 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-24 22:55:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 22:55:36,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 22:55:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:36,317 INFO L225 Difference]: With dead ends: 48 [2020-09-24 22:55:36,317 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 22:55:36,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 22:55:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 22:55:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 22:55:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 22:55:36,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-24 22:55:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:36,326 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 22:55:36,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:55:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 22:55:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 22:55:36,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:36,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:36,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:36,328 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-24 22:55:36,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:36,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022856626] [2020-09-24 22:55:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 22:55:36,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:36,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 22:55:36,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 22:55:36,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:36,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:36,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:36,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:36,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:36,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:36,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:36,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022856626] [2020-09-24 22:55:36,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:36,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 22:55:36,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199984746] [2020-09-24 22:55:36,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:55:36,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:55:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:55:36,461 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 22:55:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:36,517 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-24 22:55:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 22:55:36,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 22:55:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:36,519 INFO L225 Difference]: With dead ends: 42 [2020-09-24 22:55:36,519 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 22:55:36,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:55:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 22:55:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-24 22:55:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 22:55:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 22:55:36,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-24 22:55:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:36,527 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 22:55:36,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:55:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 22:55:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 22:55:36,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:36,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:36,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:36,529 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-24 22:55:36,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:36,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203251295] [2020-09-24 22:55:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:36,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:36,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 22:55:36,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:36,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-09-24 22:55:36,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 22:55:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:36,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 22:55:36,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:37,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:37,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:37,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:37,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:37,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:37,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203251295] [2020-09-24 22:55:37,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:37,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 22:55:37,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657594588] [2020-09-24 22:55:37,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 22:55:37,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 22:55:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:55:37,048 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 22:55:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:37,434 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 22:55:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:55:37,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 22:55:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:37,435 INFO L225 Difference]: With dead ends: 42 [2020-09-24 22:55:37,435 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 22:55:37,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 22:55:37,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 22:55:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-24 22:55:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 22:55:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 22:55:37,442 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-24 22:55:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:37,443 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 22:55:37,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 22:55:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 22:55:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 22:55:37,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:37,444 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:37,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:37,444 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-24 22:55:37,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:37,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919029265] [2020-09-24 22:55:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:37,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 22:55:37,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 22:55:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 22:55:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:37,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:37,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:37,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:37,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:37,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:37,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:37,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:37,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919029265] [2020-09-24 22:55:37,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:37,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:55:37,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937113185] [2020-09-24 22:55:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:55:37,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:55:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:55:37,592 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 22:55:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:37,682 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-24 22:55:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 22:55:37,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-24 22:55:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:37,685 INFO L225 Difference]: With dead ends: 48 [2020-09-24 22:55:37,685 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 22:55:37,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 22:55:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 22:55:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 22:55:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 22:55:37,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-24 22:55:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:37,700 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 22:55:37,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:55:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 22:55:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 22:55:37,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:37,704 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:37,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:37,705 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-24 22:55:37,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:37,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345501179] [2020-09-24 22:55:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:37,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:38,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 22:55:38,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:38,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-09-24 22:55:38,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:55:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 22:55:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 22:55:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:38,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:38,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:38,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:38,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:38,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:38,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:38,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:38,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:38,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 22:55:38,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345501179] [2020-09-24 22:55:38,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:38,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 22:55:38,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544402902] [2020-09-24 22:55:38,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 22:55:38,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 22:55:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:38,438 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 22:55:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:38,779 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-24 22:55:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:55:38,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 22:55:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:38,780 INFO L225 Difference]: With dead ends: 47 [2020-09-24 22:55:38,781 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 22:55:38,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 22:55:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 22:55:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 22:55:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 22:55:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 22:55:38,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-24 22:55:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:38,796 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 22:55:38,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 22:55:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 22:55:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 22:55:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:38,799 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:38,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:55:38,799 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-24 22:55:38,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:38,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534948240] [2020-09-24 22:55:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:38,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 22:55:39,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-24 22:55:39,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:39,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:39,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 22:55:39,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:39,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:39,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:39,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:39,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:39,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534948240] [2020-09-24 22:55:39,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:39,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 22:55:39,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926477822] [2020-09-24 22:55:39,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 22:55:39,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:39,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 22:55:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:55:39,099 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-24 22:55:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:39,222 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 22:55:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 22:55:39,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-24 22:55:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:39,223 INFO L225 Difference]: With dead ends: 60 [2020-09-24 22:55:39,224 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 22:55:39,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 22:55:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 22:55:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 22:55:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-24 22:55:39,241 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-24 22:55:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:39,242 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-24 22:55:39,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 22:55:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-24 22:55:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 22:55:39,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:39,244 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:39,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:55:39,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:39,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-24 22:55:39,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:39,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186212129] [2020-09-24 22:55:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 22:55:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-24 22:55:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 22:55:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:39,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:39,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:39,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:39,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:39,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:39,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:39,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186212129] [2020-09-24 22:55:39,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:39,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:55:39,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711524255] [2020-09-24 22:55:39,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:55:39,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:55:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:55:39,587 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-24 22:55:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:39,719 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 22:55:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 22:55:39,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-24 22:55:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:39,721 INFO L225 Difference]: With dead ends: 66 [2020-09-24 22:55:39,721 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 22:55:39,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:55:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 22:55:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 22:55:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 22:55:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-24 22:55:39,728 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-24 22:55:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:39,729 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-24 22:55:39,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:55:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-24 22:55:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 22:55:39,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:39,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:39,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:55:39,730 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-24 22:55:39,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:39,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545537751] [2020-09-24 22:55:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:40,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 22:55:40,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:40,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-09-24 22:55:40,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:40,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:55:40,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:40,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 22:55:40,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:40,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:40,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:40,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:40,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:40,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:40,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:40,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545537751] [2020-09-24 22:55:40,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:40,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 22:55:40,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215860775] [2020-09-24 22:55:40,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 22:55:40,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 22:55:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:40,150 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-24 22:55:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:40,335 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-24 22:55:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 22:55:40,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-24 22:55:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:40,336 INFO L225 Difference]: With dead ends: 72 [2020-09-24 22:55:40,336 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 22:55:40,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 22:55:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 22:55:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-24 22:55:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 22:55:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 22:55:40,343 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-24 22:55:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:40,344 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 22:55:40,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 22:55:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 22:55:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 22:55:40,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:40,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:40,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:55:40,345 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-24 22:55:40,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:40,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312629712] [2020-09-24 22:55:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:40,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 22:55:40,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-09-24 22:55:40,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:55:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 22:55:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:40,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:40,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:40,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:40,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:40,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:40,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:40,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:40,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:40,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:40,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312629712] [2020-09-24 22:55:40,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:40,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 22:55:40,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584281685] [2020-09-24 22:55:40,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 22:55:40,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 22:55:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:55:40,878 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-24 22:55:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:41,145 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 22:55:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 22:55:41,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-24 22:55:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:41,147 INFO L225 Difference]: With dead ends: 78 [2020-09-24 22:55:41,147 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 22:55:41,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 22:55:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 22:55:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 22:55:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 22:55:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 22:55:41,166 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-24 22:55:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:41,167 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 22:55:41,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 22:55:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 22:55:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 22:55:41,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:41,168 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:41,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 22:55:41,169 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-24 22:55:41,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:41,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17442327] [2020-09-24 22:55:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 22:55:41,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-09-24 22:55:41,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:55:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 22:55:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:41,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 22:55:41,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:55:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:41,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17442327] [2020-09-24 22:55:41,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:41,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 22:55:41,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413981557] [2020-09-24 22:55:41,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 22:55:41,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:41,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 22:55:41,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 22:55:41,838 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-24 22:55:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:42,102 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-24 22:55:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 22:55:42,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-24 22:55:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:42,103 INFO L225 Difference]: With dead ends: 84 [2020-09-24 22:55:42,103 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 22:55:42,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 22:55:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 22:55:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-24 22:55:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 22:55:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 22:55:42,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-24 22:55:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:42,120 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 22:55:42,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 22:55:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 22:55:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 22:55:42,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:42,123 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:42,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 22:55:42,124 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-24 22:55:42,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:42,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816529992] [2020-09-24 22:55:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 22:55:42,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-09-24 22:55:42,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 22:55:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 22:55:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 22:55:42,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:42,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:42,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:42,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 22:55:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:42,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 22:55:42,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:42,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:43,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816529992] [2020-09-24 22:55:43,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:43,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 22:55:43,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750948181] [2020-09-24 22:55:43,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 22:55:43,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 22:55:43,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:55:43,005 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-24 22:55:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:43,351 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-24 22:55:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 22:55:43,352 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-24 22:55:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:43,353 INFO L225 Difference]: With dead ends: 89 [2020-09-24 22:55:43,353 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 22:55:43,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 22:55:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 22:55:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 22:55:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 22:55:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 22:55:43,359 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-24 22:55:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:43,360 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 22:55:43,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 22:55:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 22:55:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 22:55:43,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:43,361 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:55:43,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 22:55:43,362 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-24 22:55:43,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:43,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26958711] [2020-09-24 22:55:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:55:43,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:55:43,381 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:55:43,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 22:55:43,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:55:43 BoogieIcfgContainer [2020-09-24 22:55:43,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:55:43,412 INFO L168 Benchmark]: Toolchain (without parser) took 9853.35 ms. Allocated memory was 142.1 MB in the beginning and 290.5 MB in the end (delta: 148.4 MB). Free memory was 105.3 MB in the beginning and 154.4 MB in the end (delta: -49.1 MB). Peak memory consumption was 99.2 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,413 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.72 ms. Allocated memory is still 142.1 MB. Free memory was 104.6 MB in the beginning and 95.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,414 INFO L168 Benchmark]: Boogie Preprocessor took 111.82 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 95.3 MB in the beginning and 183.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,415 INFO L168 Benchmark]: RCFGBuilder took 318.18 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 170.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,416 INFO L168 Benchmark]: TraceAbstraction took 9097.11 ms. Allocated memory was 203.4 MB in the beginning and 290.5 MB in the end (delta: 87.0 MB). Free memory was 170.3 MB in the beginning and 154.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 102.9 MB. Max. memory is 7.1 GB. [2020-09-24 22:55:43,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.72 ms. Allocated memory is still 142.1 MB. Free memory was 104.6 MB in the beginning and 95.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.82 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 95.3 MB in the beginning and 183.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.18 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 170.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9097.11 ms. Allocated memory was 203.4 MB in the beginning and 290.5 MB in the end (delta: 87.0 MB). Free memory was 170.3 MB in the beginning and 154.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 102.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.9s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 201 SDslu, 1069 SDs, 0 SdLazy, 775 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 60623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 160/758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...