/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=LOWLEXORDER --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 [2020-09-24 21:49:56,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:49:56,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:49:56,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:49:56,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:49:56,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:49:56,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:49:56,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:49:56,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:49:56,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:49:56,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:49:56,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:49:56,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:49:56,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:49:56,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:49:56,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:49:56,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:49:56,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:49:56,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:49:56,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:49:56,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:49:56,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:49:56,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:49:56,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:49:56,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:49:56,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:49:56,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:49:56,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:49:56,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:49:56,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:49:56,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:49:56,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:49:56,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:49:56,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:49:57,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:49:57,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:49:57,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:49:57,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:49:57,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:49:57,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:49:57,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:49:57,005 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:49:57,032 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:49:57,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:49:57,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:49:57,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:49:57,034 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:49:57,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:49:57,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:49:57,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:49:57,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:49:57,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:49:57,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:49:57,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:49:57,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:49:57,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:49:57,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:49:57,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:49:57,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:49:57,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:49:57,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:49:57,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:49:57,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:49:57,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:57,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:49:57,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:49:57,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:49:57,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:49:57,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:49:57,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:49:57,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:49:57,039 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:49:57,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:49:57,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:49:57,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:49:57,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:49:57,536 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:49:57,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-24 21:49:57,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba98ccf9/0f4d2c18d3d44777a8b8524a2dd3d058/FLAGee3186a91 [2020-09-24 21:49:58,157 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:49:58,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-24 21:49:58,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba98ccf9/0f4d2c18d3d44777a8b8524a2dd3d058/FLAGee3186a91 [2020-09-24 21:49:58,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba98ccf9/0f4d2c18d3d44777a8b8524a2dd3d058 [2020-09-24 21:49:58,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:49:58,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:49:58,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:58,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:49:58,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:49:58,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58, skipping insertion in model container [2020-09-24 21:49:58,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:49:58,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:49:58,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:58,879 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:49:58,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:58,966 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:49:58,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58 WrapperNode [2020-09-24 21:49:58,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:58,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:49:58,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:49:58,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:49:59,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:59,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:49:59,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:49:59,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:49:59,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:49:59,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:59,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:49:59,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:49:59,213 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:49:59,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:49:59,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:49:59,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:49:59,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:49:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:49:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:49:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:49:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:49:59,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:49:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:49:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:49:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:49:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:49:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:49:59,625 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:49:59,626 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 21:49:59,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:59 BoogieIcfgContainer [2020-09-24 21:49:59,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:49:59,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:49:59,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:49:59,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:49:59,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:49:58" (1/3) ... [2020-09-24 21:49:59,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c37ae9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:59, skipping insertion in model container [2020-09-24 21:49:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (2/3) ... [2020-09-24 21:49:59,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c37ae9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:59, skipping insertion in model container [2020-09-24 21:49:59,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:59" (3/3) ... [2020-09-24 21:49:59,643 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-24 21:49:59,661 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:49:59,678 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:49:59,698 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:49:59,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:49:59,732 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:49:59,732 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:49:59,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:49:59,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:49:59,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:49:59,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:49:59,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:49:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 21:49:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:49:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:59,768 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] [2020-09-24 21:49:59,769 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-24 21:49:59,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:59,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279791177] [2020-09-24 21:49:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:59,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:00,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:50:00,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:50:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-09-24 21:50:00,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:50:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:00,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:00,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:00,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:00,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:00,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:50:00,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:00,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:00,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:00,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:00,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:00,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279791177] [2020-09-24 21:50:00,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:00,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:00,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946427708] [2020-09-24 21:50:00,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:00,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:00,500 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-24 21:50:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:00,832 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-24 21:50:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:00,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 21:50:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:00,846 INFO L225 Difference]: With dead ends: 188 [2020-09-24 21:50:00,847 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 21:50:00,852 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 [2020-09-24 21:50:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 21:50:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-24 21:50:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 21:50:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-24 21:50:00,905 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-24 21:50:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:00,907 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-24 21:50:00,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-24 21:50:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:50:00,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:00,911 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] [2020-09-24 21:50:00,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:00,912 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-24 21:50:00,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832355863] [2020-09-24 21:50:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:01,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 21:50:01,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:01,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-09-24 21:50:01,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:01,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:01,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:01,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:01,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:01,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:01,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:01,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:01,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:01,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832355863] [2020-09-24 21:50:01,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:01,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:50:01,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063654527] [2020-09-24 21:50:01,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:50:01,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:50:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:01,220 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-24 21:50:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:01,392 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-24 21:50:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:50:01,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 21:50:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:01,395 INFO L225 Difference]: With dead ends: 144 [2020-09-24 21:50:01,395 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 21:50:01,396 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 [2020-09-24 21:50:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 21:50:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 21:50:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 21:50:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-24 21:50:01,408 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-24 21:50:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:01,408 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-24 21:50:01,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:50:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-24 21:50:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:50:01,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:01,411 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] [2020-09-24 21:50:01,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:01,411 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-24 21:50:01,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:01,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317813580] [2020-09-24 21:50:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:01,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:50:02,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:02,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-09-24 21:50:02,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:02,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:02,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:02,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:02,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:50:02,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:02,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:02,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317813580] [2020-09-24 21:50:02,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:02,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:02,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670654261] [2020-09-24 21:50:02,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:02,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:02,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:02,320 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-24 21:50:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:02,626 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-24 21:50:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:02,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-24 21:50:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:02,631 INFO L225 Difference]: With dead ends: 152 [2020-09-24 21:50:02,632 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 21:50:02,633 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 [2020-09-24 21:50:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 21:50:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-24 21:50:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 21:50:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-24 21:50:02,649 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-24 21:50:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:02,649 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-24 21:50:02,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-24 21:50:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 21:50:02,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:02,658 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] [2020-09-24 21:50:02,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:02,659 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-24 21:50:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:02,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309173279] [2020-09-24 21:50:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 21:50:03,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:03,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-09-24 21:50:03,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:03,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:03,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:03,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:03,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:03,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:03,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309173279] [2020-09-24 21:50:03,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:03,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:03,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232565241] [2020-09-24 21:50:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:03,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:03,611 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-24 21:50:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,915 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-24 21:50:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:03,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 21:50:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,917 INFO L225 Difference]: With dead ends: 159 [2020-09-24 21:50:03,918 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 21:50:03,919 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 [2020-09-24 21:50:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 21:50:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-24 21:50:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 21:50:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-24 21:50:03,928 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-24 21:50:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,928 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-24 21:50:03,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-24 21:50:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 21:50:03,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,930 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:03,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:03,931 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-24 21:50:03,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080640873] [2020-09-24 21:50:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:50:05,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:05,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-09-24 21:50:05,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:05,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:05,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:05,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:05,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 21:50:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:05,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080640873] [2020-09-24 21:50:05,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:05,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:05,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317262524] [2020-09-24 21:50:05,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:05,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:05,265 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-24 21:50:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:05,554 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2020-09-24 21:50:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:05,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 21:50:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:05,557 INFO L225 Difference]: With dead ends: 166 [2020-09-24 21:50:05,557 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 21:50:05,558 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 [2020-09-24 21:50:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 21:50:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-24 21:50:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 21:50:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-24 21:50:05,567 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-24 21:50:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:05,567 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-24 21:50:05,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-24 21:50:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 21:50:05,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:05,569 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:05,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:05,569 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2109937762, now seen corresponding path program 4 times [2020-09-24 21:50:05,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:05,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835314074] [2020-09-24 21:50:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:07,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:50:07,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-09-24 21:50:07,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:07,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:07,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835314074] [2020-09-24 21:50:07,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:07,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:07,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653636093] [2020-09-24 21:50:07,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:07,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:07,325 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-24 21:50:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:07,609 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-09-24 21:50:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:07,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-24 21:50:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:07,611 INFO L225 Difference]: With dead ends: 168 [2020-09-24 21:50:07,611 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 21:50:07,612 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 [2020-09-24 21:50:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 21:50:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 21:50:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 21:50:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-24 21:50:07,620 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-24 21:50:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:07,621 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-24 21:50:07,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-24 21:50:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 21:50:07,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:07,622 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:07,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:07,622 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash 922132249, now seen corresponding path program 5 times [2020-09-24 21:50:07,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:07,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551547261] [2020-09-24 21:50:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:07,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:07,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:07,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:07,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:07,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:07,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:07,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:07,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:07,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:07,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:07,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:07,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:07,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:07,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551547261] [2020-09-24 21:50:07,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:07,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:07,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170900882] [2020-09-24 21:50:07,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:07,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:07,886 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-24 21:50:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:08,115 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-09-24 21:50:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:08,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-24 21:50:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:08,117 INFO L225 Difference]: With dead ends: 163 [2020-09-24 21:50:08,117 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 21:50:08,118 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 [2020-09-24 21:50:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 21:50:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-24 21:50:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 21:50:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 21:50:08,125 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-24 21:50:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:08,126 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 21:50:08,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 21:50:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 21:50:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:08,128 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 21:50:08,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:08,129 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2059478739, now seen corresponding path program 6 times [2020-09-24 21:50:08,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:08,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635702958] [2020-09-24 21:50:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:08,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:08,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 21:50:08,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:08,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-09-24 21:50:08,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:08,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:08,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:08,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:08,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:08,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:08,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:08,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:08,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:08,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:08,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635702958] [2020-09-24 21:50:08,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:08,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:08,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130824448] [2020-09-24 21:50:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:08,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:08,612 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-24 21:50:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:08,931 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-24 21:50:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:08,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-24 21:50:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:08,933 INFO L225 Difference]: With dead ends: 170 [2020-09-24 21:50:08,933 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 21:50:08,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 21:50:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-24 21:50:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 21:50:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-24 21:50:08,951 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-24 21:50:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:08,953 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-24 21:50:08,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-24 21:50:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 21:50:08,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:08,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 21:50:08,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:08,956 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2012961241, now seen corresponding path program 7 times [2020-09-24 21:50:08,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:08,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608519008] [2020-09-24 21:50:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:09,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:09,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 21:50:09,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-09-24 21:50:09,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:09,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:09,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:09,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:09,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:09,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:09,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:09,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:09,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:09,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:09,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:09,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608519008] [2020-09-24 21:50:09,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:09,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:09,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812576143] [2020-09-24 21:50:09,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:09,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:09,543 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-24 21:50:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:09,924 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-09-24 21:50:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:09,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-24 21:50:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:09,926 INFO L225 Difference]: With dead ends: 177 [2020-09-24 21:50:09,926 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 21:50:09,927 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 [2020-09-24 21:50:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 21:50:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-24 21:50:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 21:50:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-24 21:50:09,936 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-24 21:50:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:09,936 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-24 21:50:09,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-24 21:50:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 21:50:09,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:09,938 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] [2020-09-24 21:50:09,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:09,938 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:09,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:09,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-24 21:50:09,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:09,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575115597] [2020-09-24 21:50:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:10,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:10,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 21:50:10,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-09-24 21:50:10,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:10,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:10,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:10,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:10,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:10,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:10,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:10,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:10,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:10,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:10,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:10,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:10,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575115597] [2020-09-24 21:50:10,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:10,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:10,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871736510] [2020-09-24 21:50:10,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:10,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:10,649 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-24 21:50:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:10,981 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-24 21:50:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:10,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-24 21:50:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:10,983 INFO L225 Difference]: With dead ends: 179 [2020-09-24 21:50:10,983 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 21:50:10,984 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 [2020-09-24 21:50:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 21:50:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-24 21:50:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 21:50:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-24 21:50:10,990 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-24 21:50:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:10,991 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-24 21:50:10,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-24 21:50:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 21:50:10,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:10,994 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] [2020-09-24 21:50:10,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:50:10,994 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-24 21:50:10,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:10,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811226960] [2020-09-24 21:50:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:50:11,023 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:50:11,023 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:50:11,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:50:11,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:50:11 BoogieIcfgContainer [2020-09-24 21:50:11,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:50:11,081 INFO L168 Benchmark]: Toolchain (without parser) took 12555.43 ms. Allocated memory was 138.4 MB in the beginning and 320.3 MB in the end (delta: 181.9 MB). Free memory was 101.6 MB in the beginning and 144.4 MB in the end (delta: -42.7 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:11,081 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:50:11,083 INFO L168 Benchmark]: CACSL2BoogieTranslator took 438.53 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:11,086 INFO L168 Benchmark]: Boogie Preprocessor took 157.92 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:11,089 INFO L168 Benchmark]: RCFGBuilder took 506.04 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 154.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:11,090 INFO L168 Benchmark]: TraceAbstraction took 11442.81 ms. Allocated memory was 201.9 MB in the beginning and 320.3 MB in the end (delta: 118.5 MB). Free memory was 153.5 MB in the beginning and 144.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 127.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:11,095 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 438.53 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.92 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.04 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 154.1 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11442.81 ms. Allocated memory was 201.9 MB in the beginning and 320.3 MB in the end (delta: 118.5 MB). Free memory was 153.5 MB in the beginning and 144.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 127.6 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)<