/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=WIDEST --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 03:26:34,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:34,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:34,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:34,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:34,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:34,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:34,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:34,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:34,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:34,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:34,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:34,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:34,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:34,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:34,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:34,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:34,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:34,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:34,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:34,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:34,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:34,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:34,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:34,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:34,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:34,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:34,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:34,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:34,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:34,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:34,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:34,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:34,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:34,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:34,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:34,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:34,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:34,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:34,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:34,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:34,288 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 03:26:34,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:34,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:34,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:34,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:34,340 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:34,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:34,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:34,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:34,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:34,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:34,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:34,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:34,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:34,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:34,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:34,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:34,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:34,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:34,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:34,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:34,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:34,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:34,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:34,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:34,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:34,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:34,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:34,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:34,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:34,348 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:26:34,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:34,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:34,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:34,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:34,831 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:34,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 03:26:34,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872d76c40/b6959bb223814071b21515617e6a443f/FLAGa24933d1c [2020-09-25 03:26:35,439 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:26:35,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 03:26:35,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872d76c40/b6959bb223814071b21515617e6a443f/FLAGa24933d1c [2020-09-25 03:26:35,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/872d76c40/b6959bb223814071b21515617e6a443f [2020-09-25 03:26:35,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:26:35,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:26:35,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:35,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:26:35,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:26:35,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:35" (1/1) ... [2020-09-25 03:26:35,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6664e0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:35, skipping insertion in model container [2020-09-25 03:26:35,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:35" (1/1) ... [2020-09-25 03:26:35,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:26:35,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:26:36,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:36,181 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:26:36,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:36,313 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:26:36,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36 WrapperNode [2020-09-25 03:26:36,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:36,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:26:36,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:26:36,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:26:36,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (1/1) ... [2020-09-25 03:26:36,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:26:36,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:26:36,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:26:36,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:26:36,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (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 03:26:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:26:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:26:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:26:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:26:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:26:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:26:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:26:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 03:26:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 03:26:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:26:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:26:36,834 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:26:36,835 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 03:26:36,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:36 BoogieIcfgContainer [2020-09-25 03:26:36,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:26:36,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:26:36,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:26:36,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:26:36,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:26:35" (1/3) ... [2020-09-25 03:26:36,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:36, skipping insertion in model container [2020-09-25 03:26:36,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:36" (2/3) ... [2020-09-25 03:26:36,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:36, skipping insertion in model container [2020-09-25 03:26:36,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:36" (3/3) ... [2020-09-25 03:26:36,851 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 03:26:36,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:26:36,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:26:36,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:26:36,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:26:36,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:26:36,928 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:26:36,928 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:26:36,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:26:36,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:26:36,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:26:36,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:26:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 03:26:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 03:26:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:36,961 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 03:26:36,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:36,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 03:26:36,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:36,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705732333] [2020-09-25 03:26:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:37,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:37,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:37,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 03:26:37,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:37,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-09-25 03:26:37,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 03:26:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 03:26:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 03:26:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:26:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:37,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:37,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:37,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:37,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:26:37,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:37,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:37,920 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 03:26:37,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705732333] [2020-09-25 03:26:37,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:37,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:26:37,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486685514] [2020-09-25 03:26:37,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:37,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:37,952 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-09-25 03:26:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:38,259 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2020-09-25 03:26:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:26:38,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 03:26:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:38,275 INFO L225 Difference]: With dead ends: 139 [2020-09-25 03:26:38,276 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 03:26:38,281 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 03:26:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 03:26:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 03:26:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 03:26:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 03:26:38,346 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 03:26:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:38,347 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 03:26:38,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 03:26:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 03:26:38,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:38,349 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 03:26:38,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:26:38,350 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 03:26:38,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:38,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401517273] [2020-09-25 03:26:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:38,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:38,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:39,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:40,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:40,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 03:26:40,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 03:26:40,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-09-25 03:26:40,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 03:26:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 03:26:40,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 03:26:40,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:40,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:40,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:40,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:40,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:40,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:40,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:26:40,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:26:40,690 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 03:26:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401517273] [2020-09-25 03:26:40,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:40,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:26:40,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518045932] [2020-09-25 03:26:40,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:26:40,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:26:40,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:26:40,704 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-09-25 03:26:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:41,882 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-09-25 03:26:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:26:41,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-09-25 03:26:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:41,885 INFO L225 Difference]: With dead ends: 113 [2020-09-25 03:26:41,885 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 03:26:41,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:26:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 03:26:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-09-25 03:26:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 03:26:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-25 03:26:41,901 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 41 [2020-09-25 03:26:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:41,901 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-25 03:26:41,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:26:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-25 03:26:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 03:26:41,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:41,904 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 03:26:41,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:26:41,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash -114770216, now seen corresponding path program 2 times [2020-09-25 03:26:41,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:41,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945477480] [2020-09-25 03:26:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:41,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:42,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:42,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:26:45,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 03:26:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3950 [2020-09-25 03:26:45,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 03:26:45,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 03:26:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 03:26:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:47,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:26:47,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945477480] [2020-09-25 03:26:47,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 03:26:47,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225120504] [2020-09-25 03:26:47,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 03:26:47,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 03:26:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:26:47,293 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 23 states. [2020-09-25 03:26:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:49,638 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-09-25 03:26:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 03:26:49,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-25 03:26:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:49,646 INFO L225 Difference]: With dead ends: 133 [2020-09-25 03:26:49,646 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 03:26:49,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 03:26:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 03:26:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2020-09-25 03:26:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 03:26:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-09-25 03:26:49,673 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 51 [2020-09-25 03:26:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:49,674 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-09-25 03:26:49,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 03:26:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-09-25 03:26:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 03:26:49,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:49,680 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] [2020-09-25 03:26:49,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:26:49,680 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 558450492, now seen corresponding path program 1 times [2020-09-25 03:26:49,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:49,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109896206] [2020-09-25 03:26:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 03:26:52,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:26:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2342 [2020-09-25 03:26:52,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:26:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 03:26:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 03:26:52,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:26:52,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 03:26:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:52,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:26:52,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:52,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:26:52,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:52,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:26:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:26:52,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:52,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109896206] [2020-09-25 03:26:52,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:52,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 03:26:52,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212635324] [2020-09-25 03:26:52,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:26:52,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:26:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:26:52,144 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 8 states. [2020-09-25 03:26:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:52,371 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-25 03:26:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 03:26:52,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-09-25 03:26:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:52,373 INFO L225 Difference]: With dead ends: 170 [2020-09-25 03:26:52,373 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 03:26:52,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 03:26:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-09-25 03:26:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 03:26:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-09-25 03:26:52,384 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 57 [2020-09-25 03:26:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:52,385 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-09-25 03:26:52,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:26:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-09-25 03:26:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 03:26:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:52,386 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 03:26:52,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:26:52,387 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 03:26:52,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:52,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874189739] [2020-09-25 03:26:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:54,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:54,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 03:26:54,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:54,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-09-25 03:26:54,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:54,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:26:54,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 03:26:54,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 03:26:54,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:54,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:54,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:54,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:54,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:26:54,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:54,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:54,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:54,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:54,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:54,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 03:26:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:54,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:54,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:26:54,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:54,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:26:54,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:54,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:26:54,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:54,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:26:54,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:54,250 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 03:26:54,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874189739] [2020-09-25 03:26:54,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:54,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 03:26:54,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648429234] [2020-09-25 03:26:54,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:26:54,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:26:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:26:54,253 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 10 states. [2020-09-25 03:26:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:54,562 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-09-25 03:26:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 03:26:54,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 03:26:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:54,564 INFO L225 Difference]: With dead ends: 185 [2020-09-25 03:26:54,564 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 03:26:54,565 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 03:26:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 03:26:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2020-09-25 03:26:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-25 03:26:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-09-25 03:26:54,590 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 64 [2020-09-25 03:26:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:54,590 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-09-25 03:26:54,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:26:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-09-25 03:26:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 03:26:54,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:54,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:54,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:26:54,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:54,597 INFO L82 PathProgramCache]: Analyzing trace with hash -38012004, now seen corresponding path program 1 times [2020-09-25 03:26:54,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:54,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919845433] [2020-09-25 03:26:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:54,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:55,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:56,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 03:26:59,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 03:26:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 03:26:59,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 03:26:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 03:26:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 03:26:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:00,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:00,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:00,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:00,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:00,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:00,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:27:00,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:00,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919845433] [2020-09-25 03:27:00,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:00,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:27:00,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276930584] [2020-09-25 03:27:00,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:27:00,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:27:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:27:00,956 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 24 states. [2020-09-25 03:27:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:03,391 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-09-25 03:27:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 03:27:03,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2020-09-25 03:27:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:03,393 INFO L225 Difference]: With dead ends: 153 [2020-09-25 03:27:03,393 INFO L226 Difference]: Without dead ends: 107 [2020-09-25 03:27:03,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 03:27:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-25 03:27:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2020-09-25 03:27:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 03:27:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-09-25 03:27:03,404 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 68 [2020-09-25 03:27:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:03,405 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-09-25 03:27:03,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:27:03,405 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-09-25 03:27:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 03:27:03,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:03,406 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 03:27:03,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:27:03,407 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1059036540, now seen corresponding path program 2 times [2020-09-25 03:27:03,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:03,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585282560] [2020-09-25 03:27:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:03,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:05,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 03:27:05,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1709 [2020-09-25 03:27:05,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:27:05,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 03:27:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 03:27:05,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:05,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:05,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:27:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 03:27:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:05,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:27:05,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:27:05,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:27:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:27:05,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:05,272 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 03:27:05,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585282560] [2020-09-25 03:27:05,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:05,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:27:05,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976900161] [2020-09-25 03:27:05,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:27:05,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:27:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:27:05,276 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 9 states. [2020-09-25 03:27:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:05,573 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-09-25 03:27:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:27:05,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-09-25 03:27:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:05,575 INFO L225 Difference]: With dead ends: 129 [2020-09-25 03:27:05,575 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 03:27:05,578 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 03:27:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 03:27:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-09-25 03:27:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 03:27:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-09-25 03:27:05,598 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 71 [2020-09-25 03:27:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:05,599 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-09-25 03:27:05,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:27:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-09-25 03:27:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 03:27:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:05,600 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 03:27:05,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:27:05,600 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 2 times [2020-09-25 03:27:05,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:05,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038749046] [2020-09-25 03:27:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:05,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:06,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:06,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:07,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 03:27:10,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 03:27:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 03:27:10,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 03:27:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 03:27:10,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 03:27:10,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:11,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:27:11,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:11,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:27:11,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:11,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:11,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:11,478 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 03:27:11,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038749046] [2020-09-25 03:27:11,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:11,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:27:11,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127049654] [2020-09-25 03:27:11,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:27:11,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:27:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:27:11,483 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 24 states. [2020-09-25 03:27:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:13,539 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-09-25 03:27:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 03:27:13,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-09-25 03:27:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:13,543 INFO L225 Difference]: With dead ends: 194 [2020-09-25 03:27:13,543 INFO L226 Difference]: Without dead ends: 192 [2020-09-25 03:27:13,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 03:27:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-25 03:27:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2020-09-25 03:27:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 03:27:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-09-25 03:27:13,555 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 75 [2020-09-25 03:27:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:13,556 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-09-25 03:27:13,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:27:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-09-25 03:27:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 03:27:13,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:13,557 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 03:27:13,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:27:13,557 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:13,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:13,558 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 3 times [2020-09-25 03:27:13,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:13,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957131748] [2020-09-25 03:27:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:27:13,580 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:27:13,580 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:27:13,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:27:13,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:27:13 BoogieIcfgContainer [2020-09-25 03:27:13,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:27:13,614 INFO L168 Benchmark]: Toolchain (without parser) took 37803.97 ms. Allocated memory was 139.5 MB in the beginning and 427.8 MB in the end (delta: 288.4 MB). Free memory was 102.3 MB in the beginning and 213.8 MB in the end (delta: -111.4 MB). Peak memory consumption was 176.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:13,615 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 03:27:13,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 499.83 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 181.5 MB in the end (delta: -79.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:13,616 INFO L168 Benchmark]: Boogie Preprocessor took 45.43 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 179.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:13,617 INFO L168 Benchmark]: RCFGBuilder took 480.44 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 160.0 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:13,618 INFO L168 Benchmark]: TraceAbstraction took 36767.87 ms. Allocated memory was 202.4 MB in the beginning and 427.8 MB in the end (delta: 225.4 MB). Free memory was 159.3 MB in the beginning and 213.8 MB in the end (delta: -54.5 MB). Peak memory consumption was 171.0 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:13,622 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 499.83 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 181.5 MB in the end (delta: -79.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.43 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 179.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 480.44 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 160.0 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36767.87 ms. Allocated memory was 202.4 MB in the beginning and 427.8 MB in the end (delta: 225.4 MB). Free memory was 159.3 MB in the beginning and 213.8 MB in the end (delta: -54.5 MB). Peak memory consumption was 171.0 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