/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:38:58,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:38:58,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:38:58,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:38:58,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:38:58,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:38:58,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:38:58,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:38:58,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:38:58,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:38:58,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:38:58,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:38:58,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:38:58,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:38:58,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:38:58,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:38:58,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:38:58,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:38:58,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:38:58,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:38:58,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:38:58,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:38:58,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:38:58,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:38:58,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:38:58,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:38:58,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:38:58,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:38:58,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:38:58,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:38:58,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:38:58,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:38:58,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:38:58,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:38:58,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:38:58,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:38:58,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:38:58,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:38:58,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:38:58,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:38:58,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:38:58,212 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 13:38:58,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:38:58,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:38:58,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:38:58,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:38:58,249 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:38:58,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:38:58,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:38:58,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:38:58,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:38:58,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:38:58,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:38:58,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:38:58,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:38:58,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:38:58,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:38:58,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:38:58,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:38:58,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:38:58,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:38:58,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:38:58,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:38:58,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:38:58,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:38:58,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:38:58,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:38:58,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:38:58,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:38:58,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:38:58,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:38:58,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:38:58,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:38:58,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:38:58,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:38:58,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:38:58,784 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:38:58,785 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 13:38:58,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c182fdd4e/7f25a97d8e1b4019a966f6ad88dffaae/FLAG4bfdd9011 [2020-09-25 13:38:59,410 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:38:59,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 13:38:59,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c182fdd4e/7f25a97d8e1b4019a966f6ad88dffaae/FLAG4bfdd9011 [2020-09-25 13:38:59,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c182fdd4e/7f25a97d8e1b4019a966f6ad88dffaae [2020-09-25 13:38:59,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:38:59,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:38:59,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:38:59,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:38:59,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:38:59,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfcebea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:59, skipping insertion in model container [2020-09-25 13:38:59,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:59" (1/1) ... [2020-09-25 13:38:59,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:38:59,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:39:00,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:39:00,050 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:39:00,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:39:00,100 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:39:00,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00 WrapperNode [2020-09-25 13:39:00,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:39:00,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:39:00,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:39:00,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:39:00,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (1/1) ... [2020-09-25 13:39:00,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:39:00,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:39:00,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:39:00,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:39:00,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (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 13:39:00,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:39:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:39:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:39:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:39:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:39:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:39:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 13:39:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 13:39:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 13:39:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:39:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:39:00,785 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:39:00,786 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 13:39:00,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:39:00 BoogieIcfgContainer [2020-09-25 13:39:00,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:39:00,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:39:00,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:39:00,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:39:00,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:38:59" (1/3) ... [2020-09-25 13:39:00,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d87b6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:39:00, skipping insertion in model container [2020-09-25 13:39:00,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:39:00" (2/3) ... [2020-09-25 13:39:00,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d87b6e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:39:00, skipping insertion in model container [2020-09-25 13:39:00,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:39:00" (3/3) ... [2020-09-25 13:39:00,812 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 13:39:00,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:39:00,834 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:39:00,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:39:00,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:39:00,890 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:39:00,890 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:39:00,890 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:39:00,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:39:00,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:39:00,890 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:39:00,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:39:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 13:39:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 13:39:00,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:00,923 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] [2020-09-25 13:39:00,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 13:39:00,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:00,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604393647] [2020-09-25 13:39:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:01,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 13:39:01,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 13:39:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-09-25 13:39:01,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:01,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:39:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 13:39:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 13:39:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:39:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:01,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:01,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:01,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 13:39:01,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:01,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:01,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:01,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:01,991 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 13:39:01,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604393647] [2020-09-25 13:39:01,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:39:01,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:39:01,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435541467] [2020-09-25 13:39:02,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:39:02,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:39:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:39:02,026 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-09-25 13:39:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:02,368 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2020-09-25 13:39:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:39:02,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 13:39:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:02,389 INFO L225 Difference]: With dead ends: 139 [2020-09-25 13:39:02,389 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 13:39:02,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 13:39:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 13:39:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 13:39:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 13:39:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 13:39:02,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 13:39:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:02,503 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 13:39:02,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:39:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 13:39:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 13:39:02,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:02,505 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 13:39:02,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:39:02,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 13:39:02,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:02,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125445249] [2020-09-25 13:39:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:02,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:02,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:04,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:04,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 13:39:04,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 13:39:04,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-09-25 13:39:04,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:04,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:04,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 13:39:04,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 13:39:04,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 13:39:04,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:04,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:04,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:39:04,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:04,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:04,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:04,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125445249] [2020-09-25 13:39:04,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:04,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 13:39:04,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15443] [2020-09-25 13:39:04,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 13:39:04,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 13:39:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-09-25 13:39:04,853 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-09-25 13:39:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:05,867 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-09-25 13:39:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 13:39:05,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-09-25 13:39:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:05,872 INFO L225 Difference]: With dead ends: 114 [2020-09-25 13:39:05,873 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 13:39:05,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2020-09-25 13:39:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 13:39:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-09-25 13:39:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 13:39:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-25 13:39:05,899 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 41 [2020-09-25 13:39:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:05,900 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-25 13:39:05,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 13:39:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-25 13:39:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 13:39:05,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:05,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:05,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:39:05,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash -114770216, now seen corresponding path program 2 times [2020-09-25 13:39:05,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:05,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757987980] [2020-09-25 13:39:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:05,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:07,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:08,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:09,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:09,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 13:39:09,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:39:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3812 [2020-09-25 13:39:09,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:09,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:09,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:39:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:39:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 13:39:09,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:09,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:09,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:09,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:09,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:09,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:09,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 13:39:09,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:09,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:09,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:09,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:39:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 13:39:09,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757987980] [2020-09-25 13:39:09,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:39:09,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 13:39:09,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595532445] [2020-09-25 13:39:09,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 13:39:09,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 13:39:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:39:09,852 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 6 states. [2020-09-25 13:39:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:10,114 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2020-09-25 13:39:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 13:39:10,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-09-25 13:39:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:10,121 INFO L225 Difference]: With dead ends: 150 [2020-09-25 13:39:10,122 INFO L226 Difference]: Without dead ends: 95 [2020-09-25 13:39:10,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:39:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-25 13:39:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-09-25 13:39:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 13:39:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-09-25 13:39:10,147 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 51 [2020-09-25 13:39:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:10,148 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-09-25 13:39:10,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 13:39:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-09-25 13:39:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 13:39:10,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:10,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:10,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:39:10,153 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 1 times [2020-09-25 13:39:10,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:10,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930229059] [2020-09-25 13:39:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:10,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:10,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:12,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:13,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:15,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:15,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 13:39:15,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:39:15,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 13:39:15,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:15,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 13:39:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 13:39:15,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 13:39:15,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:15,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:15,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:15,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:15,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:15,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:15,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:39:15,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:15,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:15,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:15,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:15,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:15,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 13:39:15,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930229059] [2020-09-25 13:39:15,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:15,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 13:39:15,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189393208] [2020-09-25 13:39:15,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 13:39:15,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 13:39:15,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-09-25 13:39:15,663 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 18 states. [2020-09-25 13:39:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:16,858 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-09-25 13:39:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 13:39:16,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-09-25 13:39:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:16,861 INFO L225 Difference]: With dead ends: 164 [2020-09-25 13:39:16,864 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 13:39:16,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 13:39:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 13:39:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-09-25 13:39:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 13:39:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 13:39:16,893 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 58 [2020-09-25 13:39:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:16,895 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 13:39:16,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 13:39:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 13:39:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 13:39:16,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:16,898 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:16,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:39:16,899 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 13:39:16,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:16,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232519567] [2020-09-25 13:39:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:16,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:16,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:18,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:18,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 13:39:18,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:18,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-09-25 13:39:18,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:18,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:39:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:39:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 13:39:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:18,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:18,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:18,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:18,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:18,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 13:39:18,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:18,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:18,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:18,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 13:39:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:18,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:18,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:18,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:39:18,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:18,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 13:39:18,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:18,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:39:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:39:18,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 13:39:18,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232519567] [2020-09-25 13:39:18,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:18,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 13:39:18,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914390016] [2020-09-25 13:39:18,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:39:18,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:39:18,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:39:18,643 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 10 states. [2020-09-25 13:39:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:18,949 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2020-09-25 13:39:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:39:18,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 13:39:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:18,951 INFO L225 Difference]: With dead ends: 157 [2020-09-25 13:39:18,951 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 13:39:18,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 13:39:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 13:39:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-09-25 13:39:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 13:39:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-09-25 13:39:18,970 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 64 [2020-09-25 13:39:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:18,970 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-09-25 13:39:18,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:39:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-09-25 13:39:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 13:39:18,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:18,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:18,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:39:18,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 2 times [2020-09-25 13:39:18,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:18,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696832469] [2020-09-25 13:39:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:19,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:19,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:19,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:20,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:21,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:22,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:22,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:24,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:24,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 13:39:24,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:39:24,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 13:39:24,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:24,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 13:39:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:39:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 13:39:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:24,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:39:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:24,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:24,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696832469] [2020-09-25 13:39:24,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:24,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 13:39:24,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109657380] [2020-09-25 13:39:24,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 13:39:24,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 13:39:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-09-25 13:39:24,538 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 21 states. [2020-09-25 13:39:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:26,582 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-09-25 13:39:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-25 13:39:26,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-25 13:39:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:26,586 INFO L225 Difference]: With dead ends: 207 [2020-09-25 13:39:26,586 INFO L226 Difference]: Without dead ends: 205 [2020-09-25 13:39:26,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 13:39:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-25 13:39:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 107. [2020-09-25 13:39:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 13:39:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 13:39:26,599 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 65 [2020-09-25 13:39:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:26,599 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 13:39:26,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 13:39:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 13:39:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 13:39:26,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:26,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:26,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 13:39:26,601 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1059036540, now seen corresponding path program 2 times [2020-09-25 13:39:26,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:26,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212123901] [2020-09-25 13:39:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:26,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:28,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 13:39:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:39:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 13:39:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:39:28,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:28,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:28,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:28,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:28,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 13:39:28,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:28,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:28,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 13:39:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:28,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:28,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 13:39:28,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:39:28,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:28,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:39:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:39:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 13:39:28,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212123901] [2020-09-25 13:39:28,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:28,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:39:28,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933735086] [2020-09-25 13:39:28,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:39:28,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:39:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:39:28,305 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 9 states. [2020-09-25 13:39:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:28,640 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2020-09-25 13:39:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 13:39:28,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-09-25 13:39:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:28,643 INFO L225 Difference]: With dead ends: 158 [2020-09-25 13:39:28,643 INFO L226 Difference]: Without dead ends: 125 [2020-09-25 13:39:28,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 13:39:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-25 13:39:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-09-25 13:39:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 13:39:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 13:39:28,653 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 71 [2020-09-25 13:39:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:28,654 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 13:39:28,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:39:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 13:39:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 13:39:28,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:28,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:28,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 13:39:28,656 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 3 times [2020-09-25 13:39:28,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:28,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158151016] [2020-09-25 13:39:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:28,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:29,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:31,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:33,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:33,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 13:39:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:39:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 13:39:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:33,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 13:39:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:39:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 13:39:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 13:39:33,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:33,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:33,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:33,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:33,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 13:39:33,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:33,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:33,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:39:33,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158151016] [2020-09-25 13:39:33,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:33,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 13:39:33,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754942433] [2020-09-25 13:39:33,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 13:39:33,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 13:39:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:39:33,787 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 11 states. [2020-09-25 13:39:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:34,326 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-25 13:39:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 13:39:34,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-25 13:39:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:34,328 INFO L225 Difference]: With dead ends: 193 [2020-09-25 13:39:34,328 INFO L226 Difference]: Without dead ends: 173 [2020-09-25 13:39:34,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-25 13:39:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-25 13:39:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-25 13:39:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 13:39:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-25 13:39:34,339 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-25 13:39:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:34,340 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-25 13:39:34,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 13:39:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-25 13:39:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 13:39:34,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:34,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:34,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 13:39:34,342 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:34,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 4 times [2020-09-25 13:39:34,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:34,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162710126] [2020-09-25 13:39:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:34,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:39,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:39,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 13:39:39,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:39:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 13:39:39,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:39,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 13:39:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 13:39:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 13:39:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:39:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:39:39,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:39:39,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:39:39,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:39:39,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:39:39,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 13:39:39,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:39:39,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:39:39,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:39:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:39:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:39:39,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:39:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 13:39:39,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162710126] [2020-09-25 13:39:39,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:39:39,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 13:39:39,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534726115] [2020-09-25 13:39:39,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 13:39:39,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:39:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 13:39:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-09-25 13:39:39,816 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 22 states. [2020-09-25 13:39:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:39:41,612 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2020-09-25 13:39:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 13:39:41,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-09-25 13:39:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:39:41,614 INFO L225 Difference]: With dead ends: 184 [2020-09-25 13:39:41,614 INFO L226 Difference]: Without dead ends: 182 [2020-09-25 13:39:41,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 13:39:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-25 13:39:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 127. [2020-09-25 13:39:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 13:39:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-25 13:39:41,630 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 75 [2020-09-25 13:39:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:39:41,636 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-25 13:39:41,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 13:39:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-25 13:39:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 13:39:41,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:39:41,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:39:41,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 13:39:41,639 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:39:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:39:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 3 times [2020-09-25 13:39:41,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:39:41,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763023294] [2020-09-25 13:39:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:39:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:39:41,659 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:39:41,660 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:39:41,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 13:39:41,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:39:41 BoogieIcfgContainer [2020-09-25 13:39:41,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:39:41,700 INFO L168 Benchmark]: Toolchain (without parser) took 41928.28 ms. Allocated memory was 146.8 MB in the beginning and 420.5 MB in the end (delta: 273.7 MB). Free memory was 102.4 MB in the beginning and 327.6 MB in the end (delta: -225.2 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,701 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.06 ms. Allocated memory is still 146.8 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,707 INFO L168 Benchmark]: Boogie Preprocessor took 156.47 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.4 MB in the beginning and 179.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,709 INFO L168 Benchmark]: RCFGBuilder took 534.91 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 160.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,710 INFO L168 Benchmark]: TraceAbstraction took 40897.38 ms. Allocated memory was 202.4 MB in the beginning and 420.5 MB in the end (delta: 218.1 MB). Free memory was 160.8 MB in the beginning and 327.6 MB in the end (delta: -166.8 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-09-25 13:39:41,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.06 ms. Allocated memory is still 146.8 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.47 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 91.4 MB in the beginning and 179.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 534.91 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 160.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40897.38 ms. Allocated memory was 202.4 MB in the beginning and 420.5 MB in the end (delta: 218.1 MB). Free memory was 160.8 MB in the beginning and 327.6 MB in the end (delta: -166.8 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i