/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=NARROWEST --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/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:18:58,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:18:58,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:18:58,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:18:58,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:18:58,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:18:58,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:18:58,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:18:58,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:18:58,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:18:58,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:18:58,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:18:58,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:18:58,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:18:58,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:18:58,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:18:58,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:18:58,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:18:58,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:18:58,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:18:58,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:18:58,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:18:58,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:18:58,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:18:58,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:18:58,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:18:58,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:18:58,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:18:58,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:18:58,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:18:58,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:18:58,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:18:58,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:18:59,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:18:59,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:18:59,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:18:59,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:18:59,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:18:59,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:18:59,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:18:59,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:18:59,011 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 02:18:59,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:18:59,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:18:59,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:18:59,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:18:59,066 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:18:59,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:18:59,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:18:59,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:18:59,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:18:59,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:18:59,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:18:59,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:18:59,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:18:59,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:18:59,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:18:59,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:18:59,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:18:59,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:18:59,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:18:59,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:18:59,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:18:59,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:59,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:18:59,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:18:59,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:18:59,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:18:59,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:18:59,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:18:59,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:18:59,071 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:18:59,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:18:59,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:18:59,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:18:59,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:18:59,563 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:18:59,565 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 02:18:59,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dd940de/74c9516a59814b42b868291a7164ddcb/FLAGfd08a83c7 [2020-09-25 02:19:00,243 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:00,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 02:19:00,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dd940de/74c9516a59814b42b868291a7164ddcb/FLAGfd08a83c7 [2020-09-25 02:19:00,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dd940de/74c9516a59814b42b868291a7164ddcb [2020-09-25 02:19:00,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:00,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:00,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:00,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:00,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:00,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:00,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2007e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00, skipping insertion in model container [2020-09-25 02:19:00,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:00,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:00,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:00,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:00,922 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:00,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:00,970 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:00,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00 WrapperNode [2020-09-25 02:19:00,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:00,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:00,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:00,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:01,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (1/1) ... [2020-09-25 02:19:01,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:01,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:01,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:01,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:01,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (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 02:19:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:19:01,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:19:01,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:19:01,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:19:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 02:19:01,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:19:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:19:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:19:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:19:01,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:01,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:01,630 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:01,631 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 02:19:01,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:01 BoogieIcfgContainer [2020-09-25 02:19:01,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:01,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:01,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:01,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:01,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:00" (1/3) ... [2020-09-25 02:19:01,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d810f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:01, skipping insertion in model container [2020-09-25 02:19:01,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:00" (2/3) ... [2020-09-25 02:19:01,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d810f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:01, skipping insertion in model container [2020-09-25 02:19:01,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:01" (3/3) ... [2020-09-25 02:19:01,648 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 02:19:01,661 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:01,671 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:19:01,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:19:01,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:01,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:01,726 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:01,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:01,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:01,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:01,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:01,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 02:19:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 02:19:01,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:01,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:01,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 02:19:01,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:01,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26953476] [2020-09-25 02:19:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 02:19:02,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:19:02,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-09-25 02:19:02,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:02,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:02,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:19:02,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:02,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 02:19:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:02,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:02,430 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 02:19:02,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26953476] [2020-09-25 02:19:02,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:02,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:19:02,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630707290] [2020-09-25 02:19:02,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:19:02,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:19:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:02,466 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 02:19:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:02,748 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 02:19:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:19:02,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 02:19:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:02,764 INFO L225 Difference]: With dead ends: 188 [2020-09-25 02:19:02,765 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 02:19:02,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 02:19:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 02:19:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 02:19:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 02:19:02,828 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 02:19:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:02,828 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 02:19:02,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:19:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 02:19:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 02:19:02,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:02,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:02,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:02,833 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 02:19:02,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:02,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461511144] [2020-09-25 02:19:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:03,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 02:19:03,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-09-25 02:19:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:19:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:03,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:03,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:03,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:03,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:03,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:19:03,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:03,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:03,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:03,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:03,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:03,177 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 02:19:03,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461511144] [2020-09-25 02:19:03,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:03,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:19:03,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083441534] [2020-09-25 02:19:03,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:19:03,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:19:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:03,182 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 02:19:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:03,371 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 02:19:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:19:03,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 02:19:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:03,374 INFO L225 Difference]: With dead ends: 144 [2020-09-25 02:19:03,374 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 02:19:03,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 02:19:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 02:19:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 02:19:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 02:19:03,387 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 02:19:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:03,388 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 02:19:03,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:19:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 02:19:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 02:19:03,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:03,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:03,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:03,391 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 02:19:03,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:03,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090880359] [2020-09-25 02:19:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:04,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 02:19:04,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-09-25 02:19:04,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:04,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:04,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 02:19:04,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:19:04,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:04,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:04,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:04,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:04,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:04,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:19:04,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:19:04,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090880359] [2020-09-25 02:19:04,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:04,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:19:04,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346377926] [2020-09-25 02:19:04,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:04,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:04,136 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 02:19:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:04,372 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-25 02:19:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:04,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 02:19:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:04,374 INFO L225 Difference]: With dead ends: 140 [2020-09-25 02:19:04,374 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 02:19:04,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 02:19:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 02:19:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 02:19:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 02:19:04,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 02:19:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:04,387 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 02:19:04,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 02:19:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 02:19:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:04,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:04,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:04,390 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-25 02:19:04,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:04,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052280402] [2020-09-25 02:19:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:04,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 02:19:05,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-09-25 02:19:05,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:19:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:05,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:05,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:05,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:05,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:19:05,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:05,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 02:19:05,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052280402] [2020-09-25 02:19:05,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:05,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:19:05,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418590937] [2020-09-25 02:19:05,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:05,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:05,339 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 6 states. [2020-09-25 02:19:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:05,537 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-25 02:19:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:05,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-09-25 02:19:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:05,539 INFO L225 Difference]: With dead ends: 161 [2020-09-25 02:19:05,539 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 02:19:05,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 02:19:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-09-25 02:19:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 02:19:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 02:19:05,548 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 02:19:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:05,549 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 02:19:05,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 02:19:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 02:19:05,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:05,551 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:05,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:05,560 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 11176526, now seen corresponding path program 3 times [2020-09-25 02:19:05,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:05,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852955341] [2020-09-25 02:19:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:05,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:06,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:06,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 02:19:06,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-09-25 02:19:06,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 02:19:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:19:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:07,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:07,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 02:19:07,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852955341] [2020-09-25 02:19:07,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:07,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:19:07,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148743434] [2020-09-25 02:19:07,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:19:07,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:19:07,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:07,033 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 8 states. [2020-09-25 02:19:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:07,256 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2020-09-25 02:19:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:19:07,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-09-25 02:19:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:07,258 INFO L225 Difference]: With dead ends: 149 [2020-09-25 02:19:07,258 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 02:19:07,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 02:19:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2020-09-25 02:19:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 02:19:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 02:19:07,268 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 02:19:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:07,269 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 02:19:07,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:19:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 02:19:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 02:19:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:07,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:07,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:07,272 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 662513150, now seen corresponding path program 4 times [2020-09-25 02:19:07,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:07,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522149677] [2020-09-25 02:19:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 02:19:09,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-09-25 02:19:09,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:19:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:09,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:19:09,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 02:19:09,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522149677] [2020-09-25 02:19:09,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:09,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:19:09,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558775208] [2020-09-25 02:19:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:19:09,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:19:09,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:09,300 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 8 states. [2020-09-25 02:19:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,580 INFO L93 Difference]: Finished difference Result 182 states and 192 transitions. [2020-09-25 02:19:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:19:09,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-25 02:19:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,582 INFO L225 Difference]: With dead ends: 182 [2020-09-25 02:19:09,582 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 02:19:09,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 02:19:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 02:19:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 02:19:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 02:19:09,592 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 02:19:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,593 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 02:19:09,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:19:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 02:19:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 02:19:09,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:09,595 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash -600384135, now seen corresponding path program 5 times [2020-09-25 02:19:09,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231067265] [2020-09-25 02:19:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 02:19:12,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:12,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2629 [2020-09-25 02:19:12,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:12,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 02:19:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:12,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:12,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:12,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:12,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:12,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 02:19:12,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231067265] [2020-09-25 02:19:12,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:12,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:12,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553988833] [2020-09-25 02:19:12,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:12,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:12,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:12,351 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 10 states. [2020-09-25 02:19:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:12,666 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2020-09-25 02:19:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:19:12,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-09-25 02:19:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:12,668 INFO L225 Difference]: With dead ends: 189 [2020-09-25 02:19:12,669 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 02:19:12,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 02:19:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-25 02:19:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 02:19:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 02:19:12,678 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 02:19:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:12,678 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 02:19:12,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 02:19:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 02:19:12,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:12,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:12,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:12,681 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash -173943394, now seen corresponding path program 6 times [2020-09-25 02:19:12,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:12,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919802595] [2020-09-25 02:19:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:16,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 02:19:16,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3509 [2020-09-25 02:19:16,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:16,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-25 02:19:16,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 02:19:16,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:16,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:16,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:16,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:19:16,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 02:19:16,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919802595] [2020-09-25 02:19:16,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:16,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:16,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336088299] [2020-09-25 02:19:16,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:16,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:16,373 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 10 states. [2020-09-25 02:19:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:16,725 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-25 02:19:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:19:16,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-09-25 02:19:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:16,727 INFO L225 Difference]: With dead ends: 170 [2020-09-25 02:19:16,728 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 02:19:16,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 02:19:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-25 02:19:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 02:19:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 02:19:16,739 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 02:19:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:16,739 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 02:19:16,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 02:19:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 02:19:16,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:16,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:16,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:16,747 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1831436462, now seen corresponding path program 7 times [2020-09-25 02:19:16,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:16,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830410824] [2020-09-25 02:19:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:16,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:21,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:21,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 02:19:21,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:21,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4305 [2020-09-25 02:19:21,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:21,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:21,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:21,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 02:19:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:21,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:21,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:21,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:21,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:21,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:19:21,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:21,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 02:19:21,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830410824] [2020-09-25 02:19:21,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:21,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:19:21,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858441470] [2020-09-25 02:19:21,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:19:21,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:21,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:19:21,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:21,290 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 12 states. [2020-09-25 02:19:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:21,675 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-09-25 02:19:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:21,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-09-25 02:19:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:21,677 INFO L225 Difference]: With dead ends: 205 [2020-09-25 02:19:21,677 INFO L226 Difference]: Without dead ends: 128 [2020-09-25 02:19:21,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:19:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-25 02:19:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-09-25 02:19:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 02:19:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 02:19:21,687 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 02:19:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:21,689 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 02:19:21,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:19:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 02:19:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 02:19:21,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:21,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:21,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:21,691 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-25 02:19:21,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:21,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821564276] [2020-09-25 02:19:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:22,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:22,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 02:19:22,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-09-25 02:19:22,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 02:19:22,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 02:19:22,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:22,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:22,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:22,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:19:22,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:22,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:22,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:22,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:22,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 02:19:22,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821564276] [2020-09-25 02:19:22,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:22,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:19:22,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218003748] [2020-09-25 02:19:22,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:19:22,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:19:22,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:22,293 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 02:19:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:22,659 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-25 02:19:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:22,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 02:19:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:22,661 INFO L225 Difference]: With dead ends: 179 [2020-09-25 02:19:22,661 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 02:19:22,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:19:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 02:19:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 02:19:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 02:19:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 02:19:22,667 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 02:19:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:22,667 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 02:19:22,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:19:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 02:19:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 02:19:22,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:22,669 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:19:22,670 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 02:19:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:22,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344528028] [2020-09-25 02:19:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:19:22,697 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:19:22,697 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:19:22,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:19:22,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:19:22 BoogieIcfgContainer [2020-09-25 02:19:22,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:19:22,767 INFO L168 Benchmark]: Toolchain (without parser) took 22145.07 ms. Allocated memory was 140.5 MB in the beginning and 377.0 MB in the end (delta: 236.5 MB). Free memory was 104.0 MB in the beginning and 119.3 MB in the end (delta: -15.3 MB). Peak memory consumption was 221.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:22,769 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:19:22,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.58 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:22,771 INFO L168 Benchmark]: Boogie Preprocessor took 123.04 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:22,771 INFO L168 Benchmark]: RCFGBuilder took 543.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 155.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:22,774 INFO L168 Benchmark]: TraceAbstraction took 21116.14 ms. Allocated memory was 202.9 MB in the beginning and 377.0 MB in the end (delta: 174.1 MB). Free memory was 155.4 MB in the beginning and 119.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 210.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:22,783 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.58 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.04 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 543.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 155.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21116.14 ms. Allocated memory was 202.9 MB in the beginning and 377.0 MB in the end (delta: 174.1 MB). Free memory was 155.4 MB in the beginning and 119.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 210.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<