/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=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-c90d42b [2020-09-24 19:33:40,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:33:40,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:33:40,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:33:40,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:33:40,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:33:40,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:33:40,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:33:40,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:33:40,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:33:40,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:33:40,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:33:40,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:33:40,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:33:40,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:33:40,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:33:40,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:33:40,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:33:40,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:33:40,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:33:40,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:33:40,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:33:40,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:33:40,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:33:40,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:33:40,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:33:40,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:33:40,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:33:40,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:33:40,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:33:40,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:33:40,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:33:40,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:33:40,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:33:40,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:33:40,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:33:40,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:33:40,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:33:40,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:33:40,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:33:40,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:33:40,766 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 [2020-09-24 19:33:40,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:33:40,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:33:40,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:33:40,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:33:40,795 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:33:40,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:33:40,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:33:40,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:33:40,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:33:40,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:33:40,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:33:40,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:33:40,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:33:40,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:33:40,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:33:40,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:33:40,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:33:40,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:33:40,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:33:40,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:33:40,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:33:40,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:33:40,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:33:40,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:33:40,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:33:40,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:33:40,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:33:40,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:33:40,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:33:40,800 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=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; [2020-09-24 19:33:41,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:33:41,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:33:41,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:33:41,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:33:41,350 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:33:41,351 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-24 19:33:41,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a991453/60df98a05edd4ee4b8610a2487726d78/FLAG430a9a9a4 [2020-09-24 19:33:41,995 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:33:41,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-24 19:33:42,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a991453/60df98a05edd4ee4b8610a2487726d78/FLAG430a9a9a4 [2020-09-24 19:33:42,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a991453/60df98a05edd4ee4b8610a2487726d78 [2020-09-24 19:33:42,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:33:42,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:33:42,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:42,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:33:42,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:33:42,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194bd3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42, skipping insertion in model container [2020-09-24 19:33:42,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:33:42,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:33:42,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:42,621 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:33:42,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:42,660 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:33:42,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42 WrapperNode [2020-09-24 19:33:42,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:42,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:33:42,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:33:42,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:33:42,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (1/1) ... [2020-09-24 19:33:42,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:33:42,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:33:42,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:33:42,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:33:42,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (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 [2020-09-24 19:33:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:33:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:33:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:33:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:33:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:33:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:33:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:33:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:33:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:33:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:33:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:33:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:33:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:33:43,135 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:33:43,135 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:33:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:43 BoogieIcfgContainer [2020-09-24 19:33:43,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:33:43,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:33:43,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:33:43,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:33:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:33:42" (1/3) ... [2020-09-24 19:33:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138ef22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:43, skipping insertion in model container [2020-09-24 19:33:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:42" (2/3) ... [2020-09-24 19:33:43,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138ef22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:43, skipping insertion in model container [2020-09-24 19:33:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:43" (3/3) ... [2020-09-24 19:33:43,153 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-24 19:33:43,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:33:43,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:33:43,228 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:33:43,267 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:33:43,267 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:33:43,267 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:33:43,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:33:43,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:33:43,268 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:33:43,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:33:43,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:33:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-24 19:33:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 19:33:43,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:43,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:43,300 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-24 19:33:43,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:43,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943889128] [2020-09-24 19:33:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:43,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:43,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:33:43,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:43,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 19:33:43,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:43,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:43,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:33:43,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:33:43,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:43,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:43,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:43,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:43,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:33:43,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:43,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:43,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:43,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:43,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:43,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943889128] [2020-09-24 19:33:43,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:43,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 19:33:43,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370853487] [2020-09-24 19:33:43,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 19:33:43,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 19:33:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:33:43,658 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-24 19:33:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:43,689 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-09-24 19:33:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 19:33:43,691 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-09-24 19:33:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:43,703 INFO L225 Difference]: With dead ends: 61 [2020-09-24 19:33:43,704 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 19:33:43,709 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 [2020-09-24 19:33:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 19:33:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 19:33:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 19:33:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-24 19:33:43,762 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-24 19:33:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:43,763 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-24 19:33:43,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 19:33:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-24 19:33:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 19:33:43,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:43,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:43,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:33:43,766 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-09-24 19:33:43,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:43,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151286706] [2020-09-24 19:33:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:43,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:43,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:43,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:43,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:33:43,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:43,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-24 19:33:43,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:33:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 19:33:43,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 19:33:43,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:33:44,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:44,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:44,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:44,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:44,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:44,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 19:33:44,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:44,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:44,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:44,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:44,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151286706] [2020-09-24 19:33:44,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:44,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:33:44,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801513545] [2020-09-24 19:33:44,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:33:44,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:33:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:33:44,048 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-24 19:33:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:44,123 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-09-24 19:33:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:33:44,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-09-24 19:33:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:44,125 INFO L225 Difference]: With dead ends: 39 [2020-09-24 19:33:44,125 INFO L226 Difference]: Without dead ends: 32 [2020-09-24 19:33:44,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-24 19:33:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-24 19:33:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 19:33:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-24 19:33:44,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-24 19:33:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:44,137 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-24 19:33:44,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:33:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-24 19:33:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 19:33:44,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:44,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:44,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:33:44,139 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-24 19:33:44,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:44,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124389439] [2020-09-24 19:33:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:44,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:44,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:44,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:33:44,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-24 19:33:44,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:33:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:33:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:33:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:33:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:44,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:44,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:44,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:33:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:44,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124389439] [2020-09-24 19:33:44,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:44,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 19:33:44,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984491469] [2020-09-24 19:33:44,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:33:44,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:33:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:33:44,424 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-24 19:33:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:44,536 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 19:33:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:33:44,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-24 19:33:44,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:44,539 INFO L225 Difference]: With dead ends: 42 [2020-09-24 19:33:44,539 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 19:33:44,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:33:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 19:33:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-24 19:33:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 19:33:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-24 19:33:44,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-24 19:33:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:44,552 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-24 19:33:44,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:33:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-24 19:33:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 19:33:44,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:44,554 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:44,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:33:44,554 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-24 19:33:44,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:44,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265823054] [2020-09-24 19:33:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:45,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:45,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 19:33:45,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-09-24 19:33:45,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:33:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 19:33:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:33:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:45,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:45,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:45,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:45,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:33:45,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:45,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:33:45,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:45,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:45,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 19:33:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:45,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:45,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:45,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:45,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:33:45,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:45,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:33:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 19:33:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:45,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265823054] [2020-09-24 19:33:45,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:45,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:33:45,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421430032] [2020-09-24 19:33:45,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:33:45,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:33:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:33:45,293 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-24 19:33:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:45,418 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-09-24 19:33:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:33:45,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-24 19:33:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:45,420 INFO L225 Difference]: With dead ends: 41 [2020-09-24 19:33:45,420 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 19:33:45,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:33:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 19:33:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-24 19:33:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 19:33:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-24 19:33:45,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 28 [2020-09-24 19:33:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:45,437 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-24 19:33:45,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:33:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-24 19:33:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 19:33:45,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:45,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:33:45,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:33:45,441 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-24 19:33:45,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:45,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581459851] [2020-09-24 19:33:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:33:45,461 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:33:45,461 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:33:45,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:33:45,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:33:45 BoogieIcfgContainer [2020-09-24 19:33:45,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:33:45,494 INFO L168 Benchmark]: Toolchain (without parser) took 3138.42 ms. Allocated memory was 146.3 MB in the beginning and 231.7 MB in the end (delta: 85.5 MB). Free memory was 105.1 MB in the beginning and 141.7 MB in the end (delta: -36.6 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,497 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 146.3 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.59 ms. Allocated memory is still 146.3 MB. Free memory was 104.5 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,500 INFO L168 Benchmark]: Boogie Preprocessor took 123.49 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.9 MB in the beginning and 183.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,506 INFO L168 Benchmark]: RCFGBuilder took 357.07 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 168.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,507 INFO L168 Benchmark]: TraceAbstraction took 2346.84 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 168.9 MB in the beginning and 141.7 MB in the end (delta: 27.1 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:45,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 146.3 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.59 ms. Allocated memory is still 146.3 MB. Free memory was 104.5 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.49 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.9 MB in the beginning and 183.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.07 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 168.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2346.84 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 168.9 MB in the beginning and 141.7 MB in the end (delta: 27.1 MB). Peak memory consumption was 54.9 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