/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:16:38,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:16:38,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:16:38,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:16:38,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:16:38,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:16:38,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:16:38,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:16:38,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:16:38,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:16:38,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:16:38,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:16:38,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:16:38,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:16:38,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:16:38,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:16:38,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:16:38,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:16:38,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:16:38,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:16:38,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:16:38,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:16:38,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:16:38,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:16:38,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:16:38,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:16:38,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:16:38,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:16:38,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:16:38,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:16:38,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:16:38,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:16:38,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:16:38,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:16:38,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:16:38,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:16:38,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:16:38,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:16:38,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:16:38,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:16:38,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:16:38,864 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 10:16:38,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:16:38,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:16:38,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:16:38,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:16:38,917 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:16:38,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:16:38,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:16:38,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:16:38,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:16:38,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:16:38,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:16:38,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:16:38,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:16:38,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:16:38,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:16:38,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:16:38,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:16:38,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:16:38,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:16:38,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:16:38,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:16:38,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:16:38,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:16:38,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:16:38,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:16:38,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:16:38,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:16:38,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:16:38,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:16:38,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:16:39,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:16:39,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:16:39,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:16:39,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:16:39,523 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:16:39,524 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 10:16:39,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29014e834/027ffcf9998b4743a4c3a160b41c3fc7/FLAGe03ad013a [2020-09-25 10:16:40,188 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:16:40,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 10:16:40,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29014e834/027ffcf9998b4743a4c3a160b41c3fc7/FLAGe03ad013a [2020-09-25 10:16:40,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29014e834/027ffcf9998b4743a4c3a160b41c3fc7 [2020-09-25 10:16:40,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:16:40,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:16:40,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:40,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:16:40,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:16:40,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:40,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d16da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40, skipping insertion in model container [2020-09-25 10:16:40,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:40,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:16:40,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:16:40,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:40,890 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:16:40,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:40,924 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:16:40,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40 WrapperNode [2020-09-25 10:16:40,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:40,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:16:40,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:16:40,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:16:40,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:40,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (1/1) ... [2020-09-25 10:16:41,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:16:41,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:16:41,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:16:41,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:16:41,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (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 10:16:41,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:16:41,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:16:41,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:16:41,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:16:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:16:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:16:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 10:16:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:16:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:16:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:16:41,348 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:16:41,348 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:16:41,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:41 BoogieIcfgContainer [2020-09-25 10:16:41,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:16:41,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:16:41,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:16:41,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:16:41,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:16:40" (1/3) ... [2020-09-25 10:16:41,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75413e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:41, skipping insertion in model container [2020-09-25 10:16:41,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:40" (2/3) ... [2020-09-25 10:16:41,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75413e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:41, skipping insertion in model container [2020-09-25 10:16:41,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:41" (3/3) ... [2020-09-25 10:16:41,365 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 10:16:41,378 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:16:41,389 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:16:41,436 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:16:41,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:16:41,521 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:16:41,521 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:16:41,521 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:16:41,521 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:16:41,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:16:41,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:16:41,522 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:16:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 10:16:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 10:16:41,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:41,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:41,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 10:16:41,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:41,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100137337] [2020-09-25 10:16:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:41,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:41,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:41,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 10:16:41,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:16:41,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-09-25 10:16:41,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:41,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:16:41,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:16:41,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:16:41,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:16:41,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:41,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:41,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:41,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:41,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:41,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 10:16:41,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:41,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:41,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:41,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:41,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100137337] [2020-09-25 10:16:41,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:16:41,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:16:41,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207184262] [2020-09-25 10:16:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:16:42,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:16:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:16:42,027 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 10:16:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:42,132 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-25 10:16:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:16:42,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 10:16:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:42,145 INFO L225 Difference]: With dead ends: 57 [2020-09-25 10:16:42,145 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 10:16:42,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:16:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 10:16:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 10:16:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 10:16:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 10:16:42,194 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 10:16:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:42,195 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 10:16:42,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:16:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 10:16:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 10:16:42,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:42,197 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] [2020-09-25 10:16:42,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:16:42,198 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 10:16:42,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:42,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247524120] [2020-09-25 10:16:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:42,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:42,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:42,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 10:16:42,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:42,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-25 10:16:42,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:42,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:16:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:16:42,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:16:42,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:16:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:42,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:42,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:42,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:16:42,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:42,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:42,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:42,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247524120] [2020-09-25 10:16:42,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:42,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:16:42,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969413917] [2020-09-25 10:16:42,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:16:42,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:16:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:16:42,905 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 10:16:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:43,146 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 10:16:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:16:43,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 10:16:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:43,151 INFO L225 Difference]: With dead ends: 60 [2020-09-25 10:16:43,151 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 10:16:43,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:16:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 10:16:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 10:16:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 10:16:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 10:16:43,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 10:16:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:43,163 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 10:16:43,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:16:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 10:16:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 10:16:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:43,165 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] [2020-09-25 10:16:43,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:16:43,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 10:16:43,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:43,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764530475] [2020-09-25 10:16:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:43,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:43,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:43,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 10:16:43,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-25 10:16:43,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:43,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:43,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:16:43,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 10:16:43,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 10:16:43,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:43,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:43,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:43,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:43,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:43,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:16:43,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:43,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:43,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:43,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:43,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:43,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:43,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764530475] [2020-09-25 10:16:43,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:43,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 10:16:43,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100985677] [2020-09-25 10:16:43,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 10:16:43,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 10:16:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:16:43,511 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 10:16:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:43,650 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 10:16:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 10:16:43,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 10:16:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:43,653 INFO L225 Difference]: With dead ends: 60 [2020-09-25 10:16:43,653 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 10:16:43,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:16:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 10:16:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 10:16:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 10:16:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 10:16:43,668 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 10:16:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:43,668 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 10:16:43,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 10:16:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 10:16:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 10:16:43,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:43,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:43,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:16:43,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 10:16:43,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:43,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457095280] [2020-09-25 10:16:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:43,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:44,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:44,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 10:16:44,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-09-25 10:16:44,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:44,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:16:44,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:44,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:44,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:44,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:44,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 10:16:44,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:44,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:44,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:16:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:44,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457095280] [2020-09-25 10:16:44,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:44,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:16:44,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775470632] [2020-09-25 10:16:44,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:16:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:16:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:16:44,409 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 10:16:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:44,821 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 10:16:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:16:44,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 10:16:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:44,823 INFO L225 Difference]: With dead ends: 54 [2020-09-25 10:16:44,823 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 10:16:44,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 10:16:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 10:16:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 10:16:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 10:16:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 10:16:44,831 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 10:16:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:44,831 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 10:16:44,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:16:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 10:16:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 10:16:44,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:44,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:44,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:16:44,834 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 10:16:44,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:44,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273265318] [2020-09-25 10:16:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:45,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:45,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 10:16:45,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:45,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-09-25 10:16:45,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:45,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 10:16:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 10:16:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 10:16:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:45,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:45,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:45,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:45,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:16:45,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:45,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:45,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:45,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:45,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:45,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273265318] [2020-09-25 10:16:45,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:45,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:16:45,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937113542] [2020-09-25 10:16:45,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:16:45,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:16:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:16:45,205 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 10:16:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:45,413 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 10:16:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 10:16:45,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 10:16:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:45,415 INFO L225 Difference]: With dead ends: 70 [2020-09-25 10:16:45,415 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 10:16:45,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:16:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 10:16:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 10:16:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 10:16:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 10:16:45,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 10:16:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:45,425 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 10:16:45,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:16:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 10:16:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 10:16:45,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:45,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:45,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:16:45,427 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 10:16:45,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:45,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274990597] [2020-09-25 10:16:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:45,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:45,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 10:16:45,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:45,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-09-25 10:16:45,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:45,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 10:16:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 10:16:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 10:16:45,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:46,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:46,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:46,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:46,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:46,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:46,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:16:46,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:46,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:46,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:46,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:46,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274990597] [2020-09-25 10:16:46,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:46,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 10:16:46,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807418232] [2020-09-25 10:16:46,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 10:16:46,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 10:16:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:16:46,031 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 10:16:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:46,335 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 10:16:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 10:16:46,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 10:16:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:46,337 INFO L225 Difference]: With dead ends: 79 [2020-09-25 10:16:46,338 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 10:16:46,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 10:16:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 10:16:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 10:16:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 10:16:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 10:16:46,350 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 10:16:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:46,351 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 10:16:46,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 10:16:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 10:16:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:16:46,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:46,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:46,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:16:46,359 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 10:16:46,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:46,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585055852] [2020-09-25 10:16:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:47,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:47,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:16:47,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:47,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-09-25 10:16:47,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:47,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 10:16:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 10:16:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:16:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:47,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:47,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:47,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 10:16:47,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 10:16:47,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:47,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:16:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:47,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585055852] [2020-09-25 10:16:47,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:47,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 10:16:47,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810122114] [2020-09-25 10:16:47,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 10:16:47,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 10:16:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:16:47,353 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 10:16:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:47,794 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 10:16:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 10:16:47,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 10:16:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:47,796 INFO L225 Difference]: With dead ends: 87 [2020-09-25 10:16:47,796 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 10:16:47,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 10:16:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 10:16:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 10:16:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 10:16:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 10:16:47,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 10:16:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:47,814 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 10:16:47,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 10:16:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 10:16:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 10:16:47,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:47,815 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:47,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:16:47,818 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 10:16:47,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:47,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786964659] [2020-09-25 10:16:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 10:16:47,843 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 10:16:47,843 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 10:16:47,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:16:47,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:16:47 BoogieIcfgContainer [2020-09-25 10:16:47,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 10:16:47,881 INFO L168 Benchmark]: Toolchain (without parser) took 7309.65 ms. Allocated memory was 148.4 MB in the beginning and 272.6 MB in the end (delta: 124.3 MB). Free memory was 104.6 MB in the beginning and 192.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,887 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.78 ms. Allocated memory is still 148.4 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,890 INFO L168 Benchmark]: Boogie Preprocessor took 121.59 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.5 MB in the beginning and 183.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,891 INFO L168 Benchmark]: RCFGBuilder took 306.96 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 171.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,894 INFO L168 Benchmark]: TraceAbstraction took 6519.10 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 170.1 MB in the beginning and 192.8 MB in the end (delta: -22.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-09-25 10:16:47,904 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.78 ms. Allocated memory is still 148.4 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.59 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.5 MB in the beginning and 183.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.96 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 171.0 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6519.10 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 170.1 MB in the beginning and 192.8 MB in the end (delta: -22.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i