/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:35:21,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:21,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:21,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:21,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:21,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:21,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:21,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:21,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:21,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:21,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:21,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:21,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:21,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:21,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:21,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:21,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:21,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:21,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:21,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:21,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:21,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:21,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:21,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:21,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:21,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:21,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:21,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:21,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:21,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:21,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:21,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:21,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:21,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:21,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:21,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:21,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:21,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:21,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:21,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:21,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:21,505 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 12:35:21,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:21,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:21,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:21,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:21,548 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:21,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:21,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:21,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:21,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:21,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:21,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:21,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:21,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:21,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:21,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:21,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:21,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:21,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:21,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:21,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:21,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:21,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:21,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:21,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:21,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:21,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:21,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:21,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:21,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:21,557 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:22,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:22,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:22,113 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:22,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:22,117 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:22,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-21 12:35:22,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c15c8b0c8/937010ae30cd43efb9a79aa1c11b1ef7/FLAGc270b8f3a [2020-09-21 12:35:22,774 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:22,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-21 12:35:22,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c15c8b0c8/937010ae30cd43efb9a79aa1c11b1ef7/FLAGc270b8f3a [2020-09-21 12:35:23,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c15c8b0c8/937010ae30cd43efb9a79aa1c11b1ef7 [2020-09-21 12:35:23,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:23,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:23,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:23,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:23,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:23,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763ad0aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23, skipping insertion in model container [2020-09-21 12:35:23,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:23,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:23,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:23,422 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:23,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:23,466 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:23,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23 WrapperNode [2020-09-21 12:35:23,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:23,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:23,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:23,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:23,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (1/1) ... [2020-09-21 12:35:23,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:23,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:23,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:23,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:23,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (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 12:35:23,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:23,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:23,653 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:35:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:35:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:35:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:35:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:23,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:23,887 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:35:23,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:23 BoogieIcfgContainer [2020-09-21 12:35:23,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:23,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:23,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:23,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:23" (1/3) ... [2020-09-21 12:35:23,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583c7475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:23, skipping insertion in model container [2020-09-21 12:35:23,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:23" (2/3) ... [2020-09-21 12:35:23,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583c7475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:23, skipping insertion in model container [2020-09-21 12:35:23,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:23" (3/3) ... [2020-09-21 12:35:23,902 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-21 12:35:23,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:23,925 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:23,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:23,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:23,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:23,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:23,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:23,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:23,975 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:23,976 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:23,976 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-21 12:35:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:35:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:24,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:24,006 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-09-21 12:35:24,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:24,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697304458] [2020-09-21 12:35:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:24,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:35:24,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:24,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-21 12:35:24,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:35:24,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:24,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:35:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:24,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:24,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:24,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:24,364 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 12:35:24,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697304458] [2020-09-21 12:35:24,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:24,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 12:35:24,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573234634] [2020-09-21 12:35:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 12:35:24,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 12:35:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:24,402 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-09-21 12:35:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:24,436 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-09-21 12:35:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 12:35:24,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 12:35:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:24,448 INFO L225 Difference]: With dead ends: 40 [2020-09-21 12:35:24,448 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 12:35:24,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 12:35:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 12:35:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 12:35:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-21 12:35:24,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-09-21 12:35:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:24,498 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-21 12:35:24,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 12:35:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-21 12:35:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:35:24,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:24,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:24,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:24,500 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-09-21 12:35:24,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:24,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443807651] [2020-09-21 12:35:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:24,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:24,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:35:24,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:24,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:35:24,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:24,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:24,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:24,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:35:24,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:24,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:24,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:24,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:24,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:24,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:24,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:24,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:24,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:24,635 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 12:35:24,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443807651] [2020-09-21 12:35:24,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:24,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:24,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554000821] [2020-09-21 12:35:24,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:24,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:24,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:24,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:24,641 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-09-21 12:35:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:24,668 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-21 12:35:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:24,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-21 12:35:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:24,670 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:35:24,671 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 12:35:24,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 12:35:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 12:35:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 12:35:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-21 12:35:24,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-09-21 12:35:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:24,681 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-21 12:35:24,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-21 12:35:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:35:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:24,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:24,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:24,683 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-09-21 12:35:24,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:24,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426033813] [2020-09-21 12:35:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:24,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:24,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:24,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:35:24,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:24,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-21 12:35:24,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:24,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:24,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:24,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:35:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:35:25,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:25,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:25,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:25,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:25,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:25,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:25,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:25,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:25,033 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 12:35:25,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426033813] [2020-09-21 12:35:25,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:25,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:35:25,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547841037] [2020-09-21 12:35:25,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:25,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:25,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:25,036 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-09-21 12:35:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:25,160 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-09-21 12:35:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:35:25,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-21 12:35:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:25,162 INFO L225 Difference]: With dead ends: 28 [2020-09-21 12:35:25,162 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 12:35:25,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 12:35:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-21 12:35:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 12:35:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 12:35:25,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2020-09-21 12:35:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:25,175 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 12:35:25,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 12:35:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 12:35:25,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:25,177 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:25,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:25,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-09-21 12:35:25,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:25,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493885105] [2020-09-21 12:35:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:25,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:35:25,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-09-21 12:35:25,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:35:25,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:25,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:25,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:25,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:25,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:25,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:25,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:35:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:25,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:25,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:35:25,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:35:25,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:25,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493885105] [2020-09-21 12:35:25,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:25,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:35:25,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934809642] [2020-09-21 12:35:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:25,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:25,755 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-21 12:35:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:25,879 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-09-21 12:35:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:35:25,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-21 12:35:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:25,881 INFO L225 Difference]: With dead ends: 32 [2020-09-21 12:35:25,881 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 12:35:25,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:35:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 12:35:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-09-21 12:35:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 12:35:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-21 12:35:25,890 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2020-09-21 12:35:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:25,890 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-21 12:35:25,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-21 12:35:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:35:25,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:25,892 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:25,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:25,892 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-09-21 12:35:25,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:25,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831705498] [2020-09-21 12:35:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:35:25,908 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:35:25,908 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:35:25,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:35:25,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:25 BoogieIcfgContainer [2020-09-21 12:35:25,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:25,939 INFO L168 Benchmark]: Toolchain (without parser) took 2794.75 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.7 MB in the beginning and 168.0 MB in the end (delta: -64.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,940 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 93.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,942 INFO L168 Benchmark]: Boogie Preprocessor took 115.79 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,943 INFO L168 Benchmark]: RCFGBuilder took 308.67 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,944 INFO L168 Benchmark]: TraceAbstraction took 2041.23 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 168.7 MB in the beginning and 168.0 MB in the end (delta: 713.1 kB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:25,948 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 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 93.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.79 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.67 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2041.23 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 168.7 MB in the beginning and 168.0 MB in the end (delta: 713.1 kB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i