/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:36,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:36,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:36,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:36,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:36,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:36,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:36,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:36,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:36,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:36,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:37,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:37,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:37,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:37,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:37,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:37,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:37,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:37,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:37,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:37,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:37,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:37,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:37,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:37,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:37,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:37,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:37,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:37,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:37,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:37,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:37,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:37,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:37,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:37,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:37,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:37,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:37,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:37,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:37,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:37,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:37,050 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 01:09:37,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:37,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:37,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:37,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:37,102 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:37,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:37,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:37,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:37,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:37,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:37,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:37,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:37,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:37,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:37,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:37,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:37,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:37,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:37,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:37,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:37,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:37,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:37,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:37,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:37,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:37,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:37,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:37,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:37,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:37,109 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:09:37,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:37,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:37,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:37,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:37,625 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:37,627 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2020-09-25 01:09:37,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/020052a1c/1e53e9a1560c4d61a62393e0154a3bcf/FLAG8139b0d9b [2020-09-25 01:09:38,291 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:38,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-2.i [2020-09-25 01:09:38,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/020052a1c/1e53e9a1560c4d61a62393e0154a3bcf/FLAG8139b0d9b [2020-09-25 01:09:38,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/020052a1c/1e53e9a1560c4d61a62393e0154a3bcf [2020-09-25 01:09:38,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:38,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:38,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:38,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:38,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:38,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:38" (1/1) ... [2020-09-25 01:09:38,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b19e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:38, skipping insertion in model container [2020-09-25 01:09:38,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:38" (1/1) ... [2020-09-25 01:09:38,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:38,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:38,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:38,998 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:39,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:39,057 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:39,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39 WrapperNode [2020-09-25 01:09:39,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:39,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:39,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:39,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:39,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:39,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:39,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:39,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:39,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (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 01:09:39,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:39,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:39,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:09:39,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:39,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:09:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:09:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 01:09:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:09:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 01:09:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 01:09:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:09:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:39,755 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:39,756 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 01:09:39,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:39 BoogieIcfgContainer [2020-09-25 01:09:39,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:39,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:39,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:39,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:39,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:38" (1/3) ... [2020-09-25 01:09:39,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1d2ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:39, skipping insertion in model container [2020-09-25 01:09:39,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39" (2/3) ... [2020-09-25 01:09:39,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1d2ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:39, skipping insertion in model container [2020-09-25 01:09:39,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:39" (3/3) ... [2020-09-25 01:09:39,773 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2020-09-25 01:09:39,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:39,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:39,817 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:39,848 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:39,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:39,849 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:39,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:39,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:39,849 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:39,849 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:39,850 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 01:09:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 01:09:39,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:39,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:39,885 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-25 01:09:39,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:39,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394443694] [2020-09-25 01:09:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:40,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:40,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 01:09:40,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 01:09:40,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-09-25 01:09:40,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-25 01:09:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:40,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:09:40,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:40,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:40,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:40,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 01:09:40,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:40,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:40,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:40,526 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 01:09:40,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394443694] [2020-09-25 01:09:40,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:40,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 01:09:40,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189384308] [2020-09-25 01:09:40,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 01:09:40,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 01:09:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:40,567 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-25 01:09:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:40,956 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-25 01:09:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 01:09:40,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 01:09:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:40,970 INFO L225 Difference]: With dead ends: 188 [2020-09-25 01:09:40,970 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 01:09:40,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 01:09:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 01:09:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-25 01:09:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 01:09:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-25 01:09:41,032 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-25 01:09:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:41,032 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-25 01:09:41,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 01:09:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-25 01:09:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 01:09:41,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:41,035 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 01:09:41,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:41,036 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-25 01:09:41,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:41,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477787492] [2020-09-25 01:09:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 01:09:41,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:41,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-09-25 01:09:41,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:09:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 01:09:41,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:09:41,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:41,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 01:09:41,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:41,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,488 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 01:09:41,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477787492] [2020-09-25 01:09:41,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:41,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:09:41,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022435172] [2020-09-25 01:09:41,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:09:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:09:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:09:41,502 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-25 01:09:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:41,699 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-25 01:09:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:09:41,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 01:09:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:41,702 INFO L225 Difference]: With dead ends: 144 [2020-09-25 01:09:41,702 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 01:09:41,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:09:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 01:09:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-25 01:09:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 01:09:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-25 01:09:41,717 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-25 01:09:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:41,717 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-25 01:09:41,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:09:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-25 01:09:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 01:09:41,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:41,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:41,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:41,723 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:41,724 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-25 01:09:41,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:41,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810240709] [2020-09-25 01:09:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 01:09:42,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-09-25 01:09:42,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 01:09:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:09:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:42,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:09:42,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:09:42,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810240709] [2020-09-25 01:09:42,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:42,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:09:42,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718227799] [2020-09-25 01:09:42,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:09:42,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:09:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:09:42,472 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-25 01:09:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:42,732 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-09-25 01:09:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 01:09:42,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-25 01:09:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:42,736 INFO L225 Difference]: With dead ends: 140 [2020-09-25 01:09:42,736 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 01:09:42,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 01:09:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-25 01:09:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 01:09:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-25 01:09:42,753 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-25 01:09:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:42,755 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-25 01:09:42,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:09:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-25 01:09:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 01:09:42,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:42,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:42,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:42,760 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1625165933, now seen corresponding path program 2 times [2020-09-25 01:09:42,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:42,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906909067] [2020-09-25 01:09:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 01:09:43,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:43,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-09-25 01:09:43,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 01:09:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:09:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:43,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:43,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 01:09:43,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:09:43,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906909067] [2020-09-25 01:09:43,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:43,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:09:43,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557921053] [2020-09-25 01:09:43,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:09:43,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:09:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:43,758 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-25 01:09:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:44,057 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-09-25 01:09:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:09:44,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-25 01:09:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:44,060 INFO L225 Difference]: With dead ends: 147 [2020-09-25 01:09:44,060 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 01:09:44,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 01:09:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-25 01:09:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 01:09:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 01:09:44,071 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-25 01:09:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:44,071 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 01:09:44,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:09:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 01:09:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 01:09:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:44,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:44,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:44,074 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2072721689, now seen corresponding path program 3 times [2020-09-25 01:09:44,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:44,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006251374] [2020-09-25 01:09:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 01:09:45,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-09-25 01:09:45,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 01:09:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:09:45,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:45,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:45,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:45,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:09:45,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006251374] [2020-09-25 01:09:45,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:45,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:09:45,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327076702] [2020-09-25 01:09:45,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:09:45,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:09:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:09:45,487 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-25 01:09:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:45,790 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-09-25 01:09:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:09:45,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 01:09:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:45,792 INFO L225 Difference]: With dead ends: 154 [2020-09-25 01:09:45,792 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 01:09:45,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:09:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 01:09:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-25 01:09:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 01:09:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-25 01:09:45,813 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-25 01:09:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:45,814 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-25 01:09:45,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:09:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-25 01:09:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 01:09:45,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:45,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:45,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:45,819 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash 480988371, now seen corresponding path program 4 times [2020-09-25 01:09:45,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:45,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109788419] [2020-09-25 01:09:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 01:09:47,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:47,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-09-25 01:09:47,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-25 01:09:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:09:47,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:47,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:09:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:09:47,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109788419] [2020-09-25 01:09:47,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:47,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:09:47,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470229781] [2020-09-25 01:09:47,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:09:47,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:09:47,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:47,666 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-25 01:09:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,132 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-09-25 01:09:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 01:09:48,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 01:09:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,134 INFO L225 Difference]: With dead ends: 156 [2020-09-25 01:09:48,135 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 01:09:48,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:09:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 01:09:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-25 01:09:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 01:09:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-25 01:09:48,160 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-25 01:09:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,161 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-25 01:09:48,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:09:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-25 01:09:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 01:09:48,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,165 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:48,165 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash 662336473, now seen corresponding path program 5 times [2020-09-25 01:09:48,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991291569] [2020-09-25 01:09:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 01:09:48,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-25 01:09:48,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:48,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 01:09:48,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:09:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:48,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 01:09:48,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:48,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 01:09:48,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991291569] [2020-09-25 01:09:48,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:48,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:09:48,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050241390] [2020-09-25 01:09:48,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:09:48,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:09:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:09:48,519 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-25 01:09:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,726 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-25 01:09:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 01:09:48,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-25 01:09:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,728 INFO L225 Difference]: With dead ends: 203 [2020-09-25 01:09:48,728 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 01:09:48,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 01:09:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-25 01:09:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 01:09:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-25 01:09:48,746 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-25 01:09:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,747 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-25 01:09:48,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:09:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-25 01:09:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 01:09:48,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,748 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:48,749 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1088777214, now seen corresponding path program 6 times [2020-09-25 01:09:48,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517703746] [2020-09-25 01:09:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 01:09:49,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-09-25 01:09:49,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 01:09:49,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:09:49,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:49,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:49,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 01:09:49,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517703746] [2020-09-25 01:09:49,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:49,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:09:49,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963362722] [2020-09-25 01:09:49,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:09:49,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:09:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:49,209 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-25 01:09:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:49,449 INFO L93 Difference]: Finished difference Result 210 states and 220 transitions. [2020-09-25 01:09:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:09:49,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-25 01:09:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:49,451 INFO L225 Difference]: With dead ends: 210 [2020-09-25 01:09:49,451 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 01:09:49,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 01:09:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-25 01:09:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 01:09:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-25 01:09:49,466 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-25 01:09:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:49,468 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-25 01:09:49,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:09:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-25 01:09:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-25 01:09:49,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:49,470 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:49,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:09:49,471 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1019285447, now seen corresponding path program 7 times [2020-09-25 01:09:49,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:49,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885101408] [2020-09-25 01:09:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 01:09:49,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-25 01:09:49,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 01:09:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:09:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:50,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:50,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:50,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:50,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 01:09:50,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885101408] [2020-09-25 01:09:50,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:50,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:09:50,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574639720] [2020-09-25 01:09:50,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:09:50,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:09:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:09:50,032 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-25 01:09:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:50,272 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-09-25 01:09:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:09:50,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-25 01:09:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:50,274 INFO L225 Difference]: With dead ends: 217 [2020-09-25 01:09:50,274 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 01:09:50,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:09:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 01:09:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-25 01:09:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 01:09:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-25 01:09:50,282 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-25 01:09:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:50,283 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-25 01:09:50,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:09:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-25 01:09:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 01:09:50,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:50,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:50,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:09:50,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1496431714, now seen corresponding path program 8 times [2020-09-25 01:09:50,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:50,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119598777] [2020-09-25 01:09:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 01:09:50,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:50,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-09-25 01:09:50,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 01:09:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:09:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:50,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:50,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:50,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:09:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-25 01:09:51,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119598777] [2020-09-25 01:09:51,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:51,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:09:51,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413245016] [2020-09-25 01:09:51,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:09:51,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:09:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:51,011 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-25 01:09:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:51,497 INFO L93 Difference]: Finished difference Result 219 states and 229 transitions. [2020-09-25 01:09:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 01:09:51,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 01:09:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:51,498 INFO L225 Difference]: With dead ends: 219 [2020-09-25 01:09:51,499 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 01:09:51,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:09:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 01:09:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-25 01:09:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 01:09:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-25 01:09:51,505 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-25 01:09:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:51,506 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-25 01:09:51,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:09:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-25 01:09:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-25 01:09:51,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:51,508 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:51,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:09:51,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-25 01:09:51,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:51,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365919002] [2020-09-25 01:09:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:09:51,539 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:09:51,539 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:09:51,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 01:09:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:51 BoogieIcfgContainer [2020-09-25 01:09:51,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:51,609 INFO L168 Benchmark]: Toolchain (without parser) took 12905.10 ms. Allocated memory was 140.5 MB in the beginning and 336.6 MB in the end (delta: 196.1 MB). Free memory was 103.7 MB in the beginning and 271.6 MB in the end (delta: -167.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,610 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,616 INFO L168 Benchmark]: Boogie Preprocessor took 140.49 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 180.8 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,616 INFO L168 Benchmark]: RCFGBuilder took 563.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 155.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,617 INFO L168 Benchmark]: TraceAbstraction took 11834.96 ms. Allocated memory was 203.4 MB in the beginning and 336.6 MB in the end (delta: 133.2 MB). Free memory was 155.3 MB in the beginning and 271.6 MB in the end (delta: -116.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:51,628 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.49 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 180.8 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 563.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 155.3 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11834.96 ms. Allocated memory was 203.4 MB in the beginning and 336.6 MB in the end (delta: 133.2 MB). Free memory was 155.3 MB in the beginning and 271.6 MB in the end (delta: -116.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 58. Possible FailurePath: [L20] char string_A[5], string_B[5]; [L21] int i, j, nc_A, nc_B, found=0; [L24] i=0 [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND TRUE i<5 [L25] string_A[i]=__VERIFIER_nondet_char() [L24] i++ [L24] COND FALSE !(i<5) [L26] EXPR string_A[5 -1] [L26] COND FALSE !(!(string_A[5 -1]=='\0')) [L28] i=0 [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND TRUE i<5 [L29] string_B[i]=__VERIFIER_nondet_char() [L28] i++ [L28] COND FALSE !(i<5) [L30] EXPR string_B[5 -1] [L30] COND FALSE !(!(string_B[5 -1]=='\0')) [L32] nc_A = 0 [L33] EXPR string_A[nc_A] [L33] COND FALSE !(string_A[nc_A]!='\0') [L36] nc_B = 0 [L37] EXPR string_B[nc_B] [L37] COND FALSE !(string_B[nc_B]!='\0') [L40] COND FALSE !(!(nc_B >= nc_A)) [L43] EXPR j=0 [L43] i=j=0 [L44] COND FALSE !((inc_B-1)<