/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:23:51,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:23:51,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:23:51,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:23:51,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:23:51,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:23:51,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:23:51,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:23:51,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:23:51,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:23:51,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:23:51,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:23:51,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:23:51,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:23:51,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:23:51,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:23:51,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:23:51,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:23:51,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:23:51,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:23:51,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:23:51,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:23:51,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:23:51,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:23:52,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:23:52,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:23:52,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:23:52,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:23:52,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:23:52,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:23:52,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:23:52,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:23:52,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:23:52,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:23:52,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:23:52,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:23:52,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:23:52,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:23:52,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:23:52,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:23:52,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:23:52,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:23:52,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:23:52,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:23:52,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:23:52,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:23:52,088 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:23:52,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:23:52,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:23:52,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:23:52,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:23:52,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:23:52,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:23:52,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:23:52,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:23:52,091 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:23:52,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:23:52,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:23:52,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:23:52,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:23:52,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:23:52,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:23:52,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:23:52,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:52,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:23:52,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:23:52,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:23:52,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:23:52,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:23:52,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:23:52,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:23:52,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:23:52,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:23:52,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:23:52,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:23:52,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:23:52,657 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:23:52,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2020-09-25 11:23:52,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3d4775b2/1b46729c4add433b80fd5c9ac334a7c6/FLAG736d8201a [2020-09-25 11:23:53,326 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:23:53,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum03-2.i [2020-09-25 11:23:53,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3d4775b2/1b46729c4add433b80fd5c9ac334a7c6/FLAG736d8201a [2020-09-25 11:23:53,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3d4775b2/1b46729c4add433b80fd5c9ac334a7c6 [2020-09-25 11:23:53,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:23:53,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:23:53,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:53,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:23:53,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:23:53,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:53" (1/1) ... [2020-09-25 11:23:53,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:53, skipping insertion in model container [2020-09-25 11:23:53,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:53" (1/1) ... [2020-09-25 11:23:53,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:23:53,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:23:53,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:53,979 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:23:54,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:54,018 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:23:54,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54 WrapperNode [2020-09-25 11:23:54,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:54,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:23:54,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:23:54,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:23:54,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:23:54,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:23:54,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:23:54,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:23:54,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:54,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:23:54,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:23:54,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:23:54,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:23:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:23:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:23:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 11:23:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:23:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:23:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:23:54,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:23:54,434 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:23:54,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:54 BoogieIcfgContainer [2020-09-25 11:23:54,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:23:54,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:23:54,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:23:54,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:23:54,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:23:53" (1/3) ... [2020-09-25 11:23:54,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b4e6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:54, skipping insertion in model container [2020-09-25 11:23:54,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (2/3) ... [2020-09-25 11:23:54,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b4e6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:54, skipping insertion in model container [2020-09-25 11:23:54,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:54" (3/3) ... [2020-09-25 11:23:54,451 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2020-09-25 11:23:54,467 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:23:54,479 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:23:54,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:23:54,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:23:54,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:23:54,565 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:23:54,565 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:23:54,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:23:54,566 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:23:54,566 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:23:54,566 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:23:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 11:23:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 11:23:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:54,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:54,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1015763017, now seen corresponding path program 1 times [2020-09-25 11:23:54,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:54,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456669822] [2020-09-25 11:23:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:54,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:54,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 11:23:54,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-09-25 11:23:54,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:54,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:54,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:23:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:23:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:23:54,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 11:23:55,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456669822] [2020-09-25 11:23:55,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:23:55,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 11:23:55,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849791455] [2020-09-25 11:23:55,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:23:55,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:23:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:23:55,453 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 9 states. [2020-09-25 11:23:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,651 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-09-25 11:23:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:23:55,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-09-25 11:23:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,666 INFO L225 Difference]: With dead ends: 50 [2020-09-25 11:23:55,666 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 11:23:55,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:23:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 11:23:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 11:23:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 11:23:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 11:23:55,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2020-09-25 11:23:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,733 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 11:23:55,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:23:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 11:23:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 11:23:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:55,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:23:55,736 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1391461948, now seen corresponding path program 1 times [2020-09-25 11:23:55,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866990302] [2020-09-25 11:23:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:23:56,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:23:56,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-09-25 11:23:56,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:23:56,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:23:56,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 11:23:56,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:23:57,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:57,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:57,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:57,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 11:23:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:23:57,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:23:57,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:23:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:23:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:23:57,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866990302] [2020-09-25 11:23:57,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:57,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 11:23:57,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369717368] [2020-09-25 11:23:57,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 11:23:57,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 11:23:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:23:57,421 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-09-25 11:23:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:57,674 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 11:23:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:23:57,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-09-25 11:23:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:57,676 INFO L225 Difference]: With dead ends: 46 [2020-09-25 11:23:57,677 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 11:23:57,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:23:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 11:23:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 11:23:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:23:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 11:23:57,688 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 29 [2020-09-25 11:23:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:57,689 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 11:23:57,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 11:23:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 11:23:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 11:23:57,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:57,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:57,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:23:57,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash -864598657, now seen corresponding path program 2 times [2020-09-25 11:23:57,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:57,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597661227] [2020-09-25 11:23:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:02,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:02,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:24:02,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:24:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 11:24:02,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:02,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:24:02,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:24:02,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 11:24:02,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:03,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:03,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:24:03,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:03,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:24:03,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:03,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:03,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:03,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:03,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 11:24:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:03,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:03,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:03,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:03,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:24:03,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:03,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:24:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:03,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:24:03,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:03,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 11:24:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:03,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:03,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:03,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:03,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:24:03,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:03,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:24:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:03,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:24:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:24:03,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597661227] [2020-09-25 11:24:03,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:03,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:24:03,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609942950] [2020-09-25 11:24:03,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:24:03,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:24:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:24:03,404 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 13 states. [2020-09-25 11:24:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:03,828 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 11:24:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:24:03,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-09-25 11:24:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:03,831 INFO L225 Difference]: With dead ends: 56 [2020-09-25 11:24:03,832 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 11:24:03,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:24:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 11:24:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-25 11:24:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 11:24:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 11:24:03,842 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 39 [2020-09-25 11:24:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:03,843 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 11:24:03,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:24:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 11:24:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:24:03,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:03,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:03,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:24:03,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash -628399238, now seen corresponding path program 3 times [2020-09-25 11:24:03,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:03,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455822187] [2020-09-25 11:24:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:03,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:08,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:08,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:24:08,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:24:08,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 11:24:08,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:08,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:24:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 11:24:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 11:24:08,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:09,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:09,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:09,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:24:09,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:09,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:24:09,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:09,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:09,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:09,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:09,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 11:24:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:09,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:09,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:09,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:09,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:09,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:24:09,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:09,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:24:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:09,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:24:09,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:09,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 11:24:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:09,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:09,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:24:09,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:09,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:24:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:24:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:09,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:24:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:09,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:09,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:09,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:09,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:09,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 11:24:09,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:09,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:24:09,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:24:09,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 11:24:09,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455822187] [2020-09-25 11:24:09,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:09,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:24:09,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818817044] [2020-09-25 11:24:09,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:24:09,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:09,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:24:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:24:09,585 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 15 states. [2020-09-25 11:24:12,146 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-09-25 11:24:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:12,358 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-09-25 11:24:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:24:12,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-09-25 11:24:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:12,365 INFO L225 Difference]: With dead ends: 62 [2020-09-25 11:24:12,369 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 11:24:12,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:24:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 11:24:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-25 11:24:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 11:24:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 11:24:12,407 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 49 [2020-09-25 11:24:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:12,407 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 11:24:12,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:24:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 11:24:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:24:12,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:12,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:12,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:24:12,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1142588341, now seen corresponding path program 4 times [2020-09-25 11:24:12,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:12,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628764854] [2020-09-25 11:24:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:12,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:12,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:14,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:18,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:18,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:24:18,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:24:18,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5685 [2020-09-25 11:24:18,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:18,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:18,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:24:18,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 11:24:18,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 11:24:18,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:18,841 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-25 11:24:19,293 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-09-25 11:24:20,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:20,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:20,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:24:20,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:24:20,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:20,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:20,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:20,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 11:24:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:20,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:21,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:21,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:21,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:24:21,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:21,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:24:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:24:21,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:21,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 11:24:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:21,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:21,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:21,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:21,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:24:21,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:21,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:24:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:21,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:24:21,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:21,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:24:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:21,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:21,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:21,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:21,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 11:24:21,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:21,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:24:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:21,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:24:21,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:21,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:24:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:21,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:21,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:21,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 11:24:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 11:24:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:21,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:24:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:24:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:24:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 68 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 11:24:21,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628764854] [2020-09-25 11:24:21,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:21,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 11:24:21,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609235153] [2020-09-25 11:24:21,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 11:24:21,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 11:24:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:24:21,344 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 18 states. [2020-09-25 11:24:24,557 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-09-25 11:24:27,178 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 60 DAG size of output: 23 [2020-09-25 11:24:28,328 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-09-25 11:24:30,952 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-09-25 11:24:33,456 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-09-25 11:24:38,023 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-09-25 11:24:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:40,568 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-09-25 11:24:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 11:24:40,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-09-25 11:24:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:40,571 INFO L225 Difference]: With dead ends: 72 [2020-09-25 11:24:40,571 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 11:24:40,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=138, Invalid=1192, Unknown=2, NotChecked=0, Total=1332 [2020-09-25 11:24:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 11:24:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-25 11:24:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 11:24:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-09-25 11:24:40,583 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 59 [2020-09-25 11:24:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:40,583 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-09-25 11:24:40,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 11:24:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-09-25 11:24:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 11:24:40,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:24:40,586 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:24:40,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:24:40,586 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:24:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:24:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash 771151408, now seen corresponding path program 5 times [2020-09-25 11:24:40,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:24:40,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557627788] [2020-09-25 11:24:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:24:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:40,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:42,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:43,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:45,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 11:24:45,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:24:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 11:24:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:45,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 11:24:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 11:24:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 11:24:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1