/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 --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 interpolation-heuristic=FIRST --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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:08,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:08,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:08,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:08,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:08,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:08,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:08,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:08,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:08,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:08,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:08,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:08,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:08,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:08,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:08,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:08,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:08,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:08,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:08,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:08,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:08,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:08,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:08,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:08,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:08,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:08,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:08,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:08,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:08,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:08,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:08,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:08,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:08,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:08,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:08,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:08,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:08,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:08,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:08,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:08,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:08,855 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 [2020-09-21 11:31:08,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:08,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:08,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:08,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:08,885 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:08,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:08,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:08,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:08,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:08,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:08,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:08,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:08,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:08,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:08,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:08,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:08,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:08,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:08,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:08,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:08,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:08,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:08,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:08,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:08,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:08,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:08,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:08,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:08,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:08,890 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:09,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:09,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:09,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:09,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:09,439 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:09,440 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-09-21 11:31:09,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71bddce17/85d08229cd0647b9be1076d0981ed532/FLAGfea37ed36 [2020-09-21 11:31:10,104 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:10,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-09-21 11:31:10,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71bddce17/85d08229cd0647b9be1076d0981ed532/FLAGfea37ed36 [2020-09-21 11:31:10,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71bddce17/85d08229cd0647b9be1076d0981ed532 [2020-09-21 11:31:10,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:10,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:10,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:10,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:10,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:10,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10, skipping insertion in model container [2020-09-21 11:31:10,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:10,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:10,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:10,742 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:10,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:10,794 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:10,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10 WrapperNode [2020-09-21 11:31:10,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:10,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:10,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:10,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:10,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (1/1) ... [2020-09-21 11:31:10,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:10,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:10,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:10,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:10,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (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 [2020-09-21 11:31:11,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:11,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:11,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:31:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:31:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:31:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:31:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:11,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:11,431 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:11,432 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 11:31:11,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:11 BoogieIcfgContainer [2020-09-21 11:31:11,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:11,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:11,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:11,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:11,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:10" (1/3) ... [2020-09-21 11:31:11,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbcefdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:11, skipping insertion in model container [2020-09-21 11:31:11,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:10" (2/3) ... [2020-09-21 11:31:11,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbcefdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:11, skipping insertion in model container [2020-09-21 11:31:11,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:11" (3/3) ... [2020-09-21 11:31:11,451 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-09-21 11:31:11,463 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:11,475 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:11,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:11,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:11,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:11,525 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:11,525 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:11,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:11,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:11,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:11,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-21 11:31:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:31:11,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:11,556 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] [2020-09-21 11:31:11,557 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:11,563 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-09-21 11:31:11,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:11,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416634258] [2020-09-21 11:31:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:11,757 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:11,757 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:11,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:11,758 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:11,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:31:11,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:11,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:31:11,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:11,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:11,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:11,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:11,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:11,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:11,859 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:11,860 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:11,860 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:11,860 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:11,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:11,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:11,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:11,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:11,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:11,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:11,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:11,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416634258] [2020-09-21 11:31:11,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:11,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:11,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864757617] [2020-09-21 11:31:11,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:11,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:11,908 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-09-21 11:31:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:12,108 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-09-21 11:31:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:12,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-21 11:31:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:12,124 INFO L225 Difference]: With dead ends: 73 [2020-09-21 11:31:12,125 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:31:12,129 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 [2020-09-21 11:31:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:31:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-09-21 11:31:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:31:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-09-21 11:31:12,176 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-09-21 11:31:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:12,176 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-09-21 11:31:12,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-09-21 11:31:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:31:12,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:12,178 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] [2020-09-21 11:31:12,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:12,179 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-09-21 11:31:12,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:12,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248959651] [2020-09-21 11:31:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:31:12,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:31:12,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:12,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:12,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,285 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,285 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,285 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,286 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:12,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:12,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:12,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:12,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:31:12,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248959651] [2020-09-21 11:31:12,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:12,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:12,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760718180] [2020-09-21 11:31:12,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:12,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:12,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:12,300 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-09-21 11:31:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:12,418 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-09-21 11:31:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:12,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-21 11:31:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:12,420 INFO L225 Difference]: With dead ends: 65 [2020-09-21 11:31:12,420 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:31:12,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:31:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-21 11:31:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:31:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-09-21 11:31:12,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-09-21 11:31:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:12,431 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-09-21 11:31:12,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-09-21 11:31:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:31:12,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:12,433 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:12,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:12,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-09-21 11:31:12,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:12,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620984760] [2020-09-21 11:31:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,528 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,529 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,531 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,531 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 11:31:12,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:12,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:12,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 11:31:12,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,650 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,650 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,651 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,651 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:12,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:12,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:12,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:12,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-21 11:31:12,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620984760] [2020-09-21 11:31:12,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:12,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:12,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894412971] [2020-09-21 11:31:12,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:12,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:12,670 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-09-21 11:31:12,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:12,803 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-09-21 11:31:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:12,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-09-21 11:31:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:12,805 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:31:12,805 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:31:12,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:31:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-09-21 11:31:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:31:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-21 11:31:12,815 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-09-21 11:31:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:12,815 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-21 11:31:12,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-21 11:31:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:31:12,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:12,817 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:12,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:12,818 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1245957476, now seen corresponding path program 3 times [2020-09-21 11:31:12,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:12,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587439672] [2020-09-21 11:31:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,869 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,869 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,869 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,869 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:31:12,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:12,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:12,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:12,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:12,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:12,946 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:12,946 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:12,946 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:12,947 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:12,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:12,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:12,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:12,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 11:31:12,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587439672] [2020-09-21 11:31:12,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:12,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:12,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929307801] [2020-09-21 11:31:12,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:12,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:12,958 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-09-21 11:31:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,108 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-09-21 11:31:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:13,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-21 11:31:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,110 INFO L225 Difference]: With dead ends: 85 [2020-09-21 11:31:13,110 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 11:31:13,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 11:31:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-09-21 11:31:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:31:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-09-21 11:31:13,119 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-09-21 11:31:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,119 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-09-21 11:31:13,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-09-21 11:31:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:31:13,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,121 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:13,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:13,122 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 4 times [2020-09-21 11:31:13,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860579293] [2020-09-21 11:31:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,210 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,213 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,213 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,213 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:31:13,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 11:31:13,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:13,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:13,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,320 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,321 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,321 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,321 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:13,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:13,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:31:13,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860579293] [2020-09-21 11:31:13,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:13,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:13,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596549436] [2020-09-21 11:31:13,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:13,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:13,333 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2020-09-21 11:31:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,492 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-09-21 11:31:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:13,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-21 11:31:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,494 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:31:13,494 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:31:13,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:31:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-09-21 11:31:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:31:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-09-21 11:31:13,504 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-09-21 11:31:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,504 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-09-21 11:31:13,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-09-21 11:31:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:31:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:13,506 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:31:13,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:13,507 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 5 times [2020-09-21 11:31:13,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:13,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405881759] [2020-09-21 11:31:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,606 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:31:13,607 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -5 [2020-09-21 11:31:13,608 FATAL L256 erpolLogProxyWrapper]: Difference in width: 5 [2020-09-21 11:31:13,608 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:31:13,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:31:13,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-21 11:31:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:13,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:13,728 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:13,729 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:13,729 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:13,729 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:13,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:13,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:13,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:13,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:13,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:13,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-09-21 11:31:13,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405881759] [2020-09-21 11:31:13,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:13,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279358705] [2020-09-21 11:31:13,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:13,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:13,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:13,748 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 6 states. [2020-09-21 11:31:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:13,868 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-09-21 11:31:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:13,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-21 11:31:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:13,869 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:31:13,869 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:31:13,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:31:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:31:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:31:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:31:13,873 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-09-21 11:31:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:13,873 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:31:13,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:31:13,874 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:31:13,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:13,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:31:14,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:14,037 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:31:14,037 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:14,037 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:14,037 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:31:14,037 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:31:14,037 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:14,038 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:31:14,038 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 11:31:14,038 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:31:14,038 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:31:14,038 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,038 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-09-21 11:31:14,039 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-09-21 11:31:14,039 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,039 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-09-21 11:31:14,039 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-09-21 11:31:14,039 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-09-21 11:31:14,039 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,040 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-21 11:31:14,040 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-21 11:31:14,040 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,040 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-09-21 11:31:14,040 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-09-21 11:31:14,040 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-09-21 11:31:14,040 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 11:31:14,041 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-09-21 11:31:14,041 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,041 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-09-21 11:31:14,041 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-09-21 11:31:14,041 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-21 11:31:14,041 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-09-21 11:31:14,041 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-09-21 11:31:14,042 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-09-21 11:31:14,042 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-09-21 11:31:14,042 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-21 11:31:14,042 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-09-21 11:31:14,042 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-09-21 11:31:14,042 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-09-21 11:31:14,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:14 BoogieIcfgContainer [2020-09-21 11:31:14,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:14,070 INFO L168 Benchmark]: Toolchain (without parser) took 3610.95 ms. Allocated memory was 141.0 MB in the beginning and 244.3 MB in the end (delta: 103.3 MB). Free memory was 104.7 MB in the beginning and 199.3 MB in the end (delta: -94.5 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,071 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.20 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 93.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,073 INFO L168 Benchmark]: Boogie Preprocessor took 133.08 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 180.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,074 INFO L168 Benchmark]: RCFGBuilder took 508.72 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 161.7 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,075 INFO L168 Benchmark]: TraceAbstraction took 2627.86 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 161.1 MB in the beginning and 199.3 MB in the end (delta: -38.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:14,079 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.20 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 93.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.08 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 180.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 508.72 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 161.7 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2627.86 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 161.1 MB in the beginning and 199.3 MB in the end (delta: -38.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 156 SDtfs, 122 SDslu, 315 SDs, 0 SdLazy, 438 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 68 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 31 NumberOfFragments, 58 HoareAnnotationTreeSize, 16 FomulaSimplifications, 110 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 10712 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 80/110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...