/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:03:58,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:03:58,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:03:58,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:03:58,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:03:58,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:03:58,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:03:58,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:03:58,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:03:58,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:03:58,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:03:58,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:03:58,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:03:58,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:03:58,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:03:58,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:03:58,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:03:58,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:03:58,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:03:58,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:03:58,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:03:58,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:03:58,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:03:58,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:03:58,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:03:58,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:03:58,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:03:58,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:03:58,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:03:58,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:03:58,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:03:58,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:03:58,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:03:58,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:03:58,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:03:58,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:03:58,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:03:58,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:03:58,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:03:58,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:03:58,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:03:58,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 00:03:58,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:03:58,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:03:58,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:03:58,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:03:58,995 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:03:58,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:03:58,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:03:58,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:03:58,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:03:58,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:03:58,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:03:58,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:03:58,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:03:58,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:03:58,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:03:58,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:03:58,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:03:59,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:03:59,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:03:59,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:03:59,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:03:59,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:03:59,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:03:59,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:03:59,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:03:59,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:03:59,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:03:59,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:03:59,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:03:59,005 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:03:59,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:03:59,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:03:59,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:03:59,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:03:59,561 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:03:59,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 00:03:59,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3dd5cf/5246fca8e0d348599a77e3fdf5ad0a68/FLAGcdd34508d [2020-09-25 00:04:00,220 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:00,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 00:04:00,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3dd5cf/5246fca8e0d348599a77e3fdf5ad0a68/FLAGcdd34508d [2020-09-25 00:04:00,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37c3dd5cf/5246fca8e0d348599a77e3fdf5ad0a68 [2020-09-25 00:04:00,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:00,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:00,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:00,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:00,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:00,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:00,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f37f30e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00, skipping insertion in model container [2020-09-25 00:04:00,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:00,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:00,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:00,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:00,900 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:00,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:00,957 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:00,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00 WrapperNode [2020-09-25 00:04:00,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:00,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:00,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:00,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:01,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... [2020-09-25 00:04:01,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:01,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:01,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:01,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:01,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:01,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:01,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:01,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:04:01,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:01,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:04:01,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:04:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 00:04:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:04:01,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:04:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:04:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:04:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:01,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:01,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:01,590 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 00:04:01,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:01 BoogieIcfgContainer [2020-09-25 00:04:01,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:01,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:01,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:01,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:01,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:00" (1/3) ... [2020-09-25 00:04:01,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68de565d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:01, skipping insertion in model container [2020-09-25 00:04:01,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:00" (2/3) ... [2020-09-25 00:04:01,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68de565d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:01, skipping insertion in model container [2020-09-25 00:04:01,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:01" (3/3) ... [2020-09-25 00:04:01,607 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 00:04:01,619 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:01,629 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:01,654 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:01,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:01,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:01,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:01,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:01,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:01,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:01,691 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:01,691 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 00:04:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 00:04:01,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:01,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:01,730 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 00:04:01,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:01,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101089790] [2020-09-25 00:04:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:01,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:02,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 00:04:02,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:04:02,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-09-25 00:04:02,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:02,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 00:04:02,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:02,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:04:02,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:02,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:02,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:02,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:02,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 00:04:02,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:02,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:02,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:02,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:04:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:02,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101089790] [2020-09-25 00:04:02,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:02,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:04:02,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568510958] [2020-09-25 00:04:02,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:04:02,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:04:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:02,382 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 00:04:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:02,732 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 00:04:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:04:02,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 00:04:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:02,748 INFO L225 Difference]: With dead ends: 188 [2020-09-25 00:04:02,748 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 00:04:02,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 00:04:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 00:04:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 00:04:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 00:04:02,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 00:04:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:02,815 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 00:04:02,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:04:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 00:04:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 00:04:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:02,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:02,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:02,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:02,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:02,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 00:04:02,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:02,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328733219] [2020-09-25 00:04:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:02,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:03,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:03,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 00:04:03,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:03,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-25 00:04:03,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 00:04:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:03,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:03,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:03,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:03,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:03,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:03,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:04:03,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:04:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:03,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328733219] [2020-09-25 00:04:03,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:03,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 00:04:03,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37421412] [2020-09-25 00:04:03,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:04:03,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:03,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:04:03,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:03,195 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 00:04:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:03,367 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 00:04:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:04:03,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 00:04:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:03,370 INFO L225 Difference]: With dead ends: 144 [2020-09-25 00:04:03,370 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 00:04:03,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:04:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 00:04:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 00:04:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 00:04:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 00:04:03,384 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 00:04:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:03,384 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 00:04:03,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:04:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 00:04:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 00:04:03,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:03,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:03,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:03,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 00:04:03,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:03,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807681497] [2020-09-25 00:04:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:03,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:04,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:04:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 760 [2020-09-25 00:04:04,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:04:04,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:04,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:04,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:04,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:04,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:04,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:04,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:04,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:04,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:04,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:04:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807681497] [2020-09-25 00:04:04,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:04,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:04:04,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507336294] [2020-09-25 00:04:04,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:04:04,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:04:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:04:04,237 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 00:04:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:04,441 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-25 00:04:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:04:04,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 00:04:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:04,443 INFO L225 Difference]: With dead ends: 152 [2020-09-25 00:04:04,444 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 00:04:04,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 00:04:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 00:04:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 00:04:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 00:04:04,454 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 00:04:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:04,455 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 00:04:04,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:04:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 00:04:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 00:04:04,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:04,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:04,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:04,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-25 00:04:04,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:04,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007740304] [2020-09-25 00:04:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:05,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 00:04:05,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:05,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-09-25 00:04:05,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:05,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:05,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:05,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:04:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:05,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:05,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:05,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:05,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:05,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:05,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:04:05,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007740304] [2020-09-25 00:04:05,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:05,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:04:05,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174258701] [2020-09-25 00:04:05,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:04:05,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:04:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:05,442 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 00:04:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:05,723 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-25 00:04:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:04:05,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 00:04:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:05,725 INFO L225 Difference]: With dead ends: 159 [2020-09-25 00:04:05,726 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 00:04:05,727 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 [2020-09-25 00:04:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 00:04:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 00:04:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 00:04:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 00:04:05,736 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 00:04:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:05,736 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 00:04:05,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:04:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 00:04:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 00:04:05,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:05,739 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] [2020-09-25 00:04:05,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:04:05,739 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-25 00:04:05,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:05,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790283261] [2020-09-25 00:04:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:05,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:05,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:06,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:06,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 00:04:06,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:06,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1201 [2020-09-25 00:04:06,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:04:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 00:04:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:07,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:07,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:07,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:07,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:07,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:07,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:04:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790283261] [2020-09-25 00:04:07,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:07,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:04:07,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701751640] [2020-09-25 00:04:07,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:04:07,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:04:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:04:07,056 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-25 00:04:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:07,317 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2020-09-25 00:04:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:04:07,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 00:04:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:07,319 INFO L225 Difference]: With dead ends: 166 [2020-09-25 00:04:07,320 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 00:04:07,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 00:04:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-25 00:04:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 00:04:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 00:04:07,330 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 00:04:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:07,330 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 00:04:07,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:04:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 00:04:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 00:04:07,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:07,332 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] [2020-09-25 00:04:07,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:04:07,333 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2109937762, now seen corresponding path program 4 times [2020-09-25 00:04:07,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:07,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356615404] [2020-09-25 00:04:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:07,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:07,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:08,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:08,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 00:04:08,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:08,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-09-25 00:04:08,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 00:04:08,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:04:08,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:08,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:08,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:08,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:08,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:08,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:08,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:04:09,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356615404] [2020-09-25 00:04:09,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:09,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:04:09,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599705814] [2020-09-25 00:04:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:04:09,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:04:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:09,007 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-25 00:04:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:09,267 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-09-25 00:04:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:04:09,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 00:04:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:09,269 INFO L225 Difference]: With dead ends: 168 [2020-09-25 00:04:09,269 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 00:04:09,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 00:04:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 00:04:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 00:04:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 00:04:09,278 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 00:04:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:09,278 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 00:04:09,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:04:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 00:04:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 00:04:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:09,280 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] [2020-09-25 00:04:09,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:04:09,281 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash 922132249, now seen corresponding path program 5 times [2020-09-25 00:04:09,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:09,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489103133] [2020-09-25 00:04:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:09,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:09,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 00:04:09,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:09,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 00:04:09,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:09,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:09,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 00:04:09,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:04:09,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:09,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:09,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:09,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:09,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:09,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:09,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:09,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:09,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:09,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:09,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:09,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 00:04:09,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489103133] [2020-09-25 00:04:09,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:09,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:04:09,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770491996] [2020-09-25 00:04:09,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:04:09,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:04:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:04:09,532 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-25 00:04:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:09,753 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-09-25 00:04:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:04:09,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-25 00:04:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:09,755 INFO L225 Difference]: With dead ends: 163 [2020-09-25 00:04:09,755 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 00:04:09,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 00:04:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-25 00:04:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 00:04:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 00:04:09,764 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 00:04:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:09,764 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 00:04:09,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:04:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 00:04:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 00:04:09,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:09,767 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] [2020-09-25 00:04:09,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:04:09,767 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:09,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2059478739, now seen corresponding path program 6 times [2020-09-25 00:04:09,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:09,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19392341] [2020-09-25 00:04:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:09,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:10,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:10,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 00:04:10,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-25 00:04:10,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 00:04:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:04:10,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:10,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:10,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:10,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:10,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:10,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:04:10,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:10,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:10,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:10,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 00:04:10,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19392341] [2020-09-25 00:04:10,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:10,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:04:10,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413954725] [2020-09-25 00:04:10,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:04:10,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:04:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:04:10,201 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-25 00:04:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:10,472 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-25 00:04:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:04:10,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-25 00:04:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:10,474 INFO L225 Difference]: With dead ends: 170 [2020-09-25 00:04:10,474 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 00:04:10,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 00:04:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-25 00:04:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 00:04:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 00:04:10,481 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 00:04:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:10,481 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 00:04:10,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:04:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 00:04:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 00:04:10,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:10,483 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] [2020-09-25 00:04:10,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:04:10,484 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2012961241, now seen corresponding path program 7 times [2020-09-25 00:04:10,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:10,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639129342] [2020-09-25 00:04:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:10,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:10,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 00:04:10,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:10,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-09-25 00:04:10,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:10,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:04:10,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 00:04:10,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 00:04:10,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:11,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:11,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:11,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:11,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:11,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 00:04:11,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:11,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:11,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:11,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 00:04:11,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639129342] [2020-09-25 00:04:11,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:11,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:04:11,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819730249] [2020-09-25 00:04:11,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:04:11,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:04:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:04:11,080 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-25 00:04:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:11,418 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-09-25 00:04:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:04:11,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-25 00:04:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:11,420 INFO L225 Difference]: With dead ends: 177 [2020-09-25 00:04:11,420 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 00:04:11,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:04:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 00:04:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-25 00:04:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 00:04:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 00:04:11,429 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 00:04:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:11,429 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 00:04:11,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:04:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 00:04:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 00:04:11,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:11,431 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:11,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:04:11,431 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-25 00:04:11,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:11,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068375153] [2020-09-25 00:04:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:11,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:11,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 00:04:11,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-09-25 00:04:11,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 00:04:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:04:11,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:12,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:12,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:04:12,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:12,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 00:04:12,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068375153] [2020-09-25 00:04:12,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:12,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:04:12,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036624548] [2020-09-25 00:04:12,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:04:12,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:04:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:04:12,118 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 00:04:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:12,461 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-25 00:04:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:04:12,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 00:04:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:12,464 INFO L225 Difference]: With dead ends: 179 [2020-09-25 00:04:12,464 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 00:04:12,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:04:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 00:04:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 00:04:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 00:04:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 00:04:12,471 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 00:04:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:12,471 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 00:04:12,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:04:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 00:04:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 00:04:12,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:12,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:12,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:04:12,474 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 00:04:12,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:12,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974925923] [2020-09-25 00:04:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:04:12,505 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:04:12,505 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:04:12,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:04:12,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:04:12 BoogieIcfgContainer [2020-09-25 00:04:12,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:04:12,539 INFO L168 Benchmark]: Toolchain (without parser) took 11951.87 ms. Allocated memory was 110.1 MB in the beginning and 286.3 MB in the end (delta: 176.2 MB). Free memory was 75.3 MB in the beginning and 234.9 MB in the end (delta: -159.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,540 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 110.1 MB. Free memory was 92.8 MB in the beginning and 92.7 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.07 ms. Allocated memory was 110.1 MB in the beginning and 123.2 MB in the end (delta: 13.1 MB). Free memory was 74.7 MB in the beginning and 98.9 MB in the end (delta: -24.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,542 INFO L168 Benchmark]: Boogie Preprocessor took 141.34 ms. Allocated memory was 123.2 MB in the beginning and 163.6 MB in the end (delta: 40.4 MB). Free memory was 98.9 MB in the beginning and 148.3 MB in the end (delta: -49.4 MB). Peak memory consumption was 455.0 kB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,542 INFO L168 Benchmark]: RCFGBuilder took 496.69 ms. Allocated memory is still 163.6 MB. Free memory was 148.3 MB in the beginning and 124.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,543 INFO L168 Benchmark]: TraceAbstraction took 10937.05 ms. Allocated memory was 163.6 MB in the beginning and 286.3 MB in the end (delta: 122.7 MB). Free memory was 123.6 MB in the beginning and 234.9 MB in the end (delta: -111.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:04:12,547 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 110.1 MB. Free memory was 92.8 MB in the beginning and 92.7 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 367.07 ms. Allocated memory was 110.1 MB in the beginning and 123.2 MB in the end (delta: 13.1 MB). Free memory was 74.7 MB in the beginning and 98.9 MB in the end (delta: -24.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.34 ms. Allocated memory was 123.2 MB in the beginning and 163.6 MB in the end (delta: 40.4 MB). Free memory was 98.9 MB in the beginning and 148.3 MB in the end (delta: -49.4 MB). Peak memory consumption was 455.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 496.69 ms. Allocated memory is still 163.6 MB. Free memory was 148.3 MB in the beginning and 124.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10937.05 ms. Allocated memory was 163.6 MB in the beginning and 286.3 MB in the end (delta: 122.7 MB). Free memory was 123.6 MB in the beginning and 234.9 MB in the end (delta: -111.3 MB). Peak memory consumption was 11.4 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)<