/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:57:33,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:57:33,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:57:33,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:57:33,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:57:33,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:57:33,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:57:33,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:57:33,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:57:33,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:57:33,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:57:33,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:57:33,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:57:33,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:57:33,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:57:33,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:57:33,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:57:33,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:57:33,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:57:33,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:57:33,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:57:33,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:57:33,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:57:33,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:57:33,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:57:33,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:57:33,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:57:33,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:57:33,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:57:33,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:57:33,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:57:33,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:57:33,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:57:33,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:57:33,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:57:33,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:57:33,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:57:33,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:57:33,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:57:33,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:57:33,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:57:33,784 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 [2020-10-13 10:57:33,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:57:33,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:57:33,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:57:33,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:57:33,822 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:57:33,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:57:33,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:57:33,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:57:33,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:57:33,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:57:33,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:57:33,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:57:33,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:57:33,825 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:57:33,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:57:33,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:57:33,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:57:33,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:57:33,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:57:33,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:57:33,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:57:33,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:57:33,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:57:33,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:57:33,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:57:33,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:57:33,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:57:33,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:57:33,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:57:33,828 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:57:34,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:57:34,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:57:34,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:57:34,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:57:34,121 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:57:34,122 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2020-10-13 10:57:34,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9cf967f3/ac52ae6a115742839cd2e2e34a7d73db/FLAGe500663bc [2020-10-13 10:57:34,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:57:34,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2020-10-13 10:57:34,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9cf967f3/ac52ae6a115742839cd2e2e34a7d73db/FLAGe500663bc [2020-10-13 10:57:34,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9cf967f3/ac52ae6a115742839cd2e2e34a7d73db [2020-10-13 10:57:34,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:57:34,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:57:34,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:57:34,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:57:34,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:57:34,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:57:34" (1/1) ... [2020-10-13 10:57:34,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f914f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:34, skipping insertion in model container [2020-10-13 10:57:34,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:57:34" (1/1) ... [2020-10-13 10:57:35,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:57:35,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:57:35,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:57:35,199 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:57:35,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:57:35,233 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:57:35,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35 WrapperNode [2020-10-13 10:57:35,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:57:35,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:57:35,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:57:35,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:57:35,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (1/1) ... [2020-10-13 10:57:35,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:57:35,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:57:35,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:57:35,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:57:35,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (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 [2020-10-13 10:57:35,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:57:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:57:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:57:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:57:35,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:57:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:57:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:57:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:57:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:57:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:57:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:57:35,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:57:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:57:35,758 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:57:35,758 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:57:35,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:57:35 BoogieIcfgContainer [2020-10-13 10:57:35,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:57:35,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:57:35,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:57:35,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:57:35,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:57:34" (1/3) ... [2020-10-13 10:57:35,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fad684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:57:35, skipping insertion in model container [2020-10-13 10:57:35,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:57:35" (2/3) ... [2020-10-13 10:57:35,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fad684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:57:35, skipping insertion in model container [2020-10-13 10:57:35,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:57:35" (3/3) ... [2020-10-13 10:57:35,771 INFO L109 eAbstractionObserver]: Analyzing ICFG loopv1.c [2020-10-13 10:57:35,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:57:35,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:57:35,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:57:35,832 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:57:35,832 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:57:35,832 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:57:35,832 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:57:35,832 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:57:35,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:57:35,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:57:35,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:57:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-13 10:57:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:57:35,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:35,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:35,859 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -712399266, now seen corresponding path program 1 times [2020-10-13 10:57:35,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:35,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981815517] [2020-10-13 10:57:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:57:36,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:36,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-13 10:57:36,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:57:36,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:57:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:36,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:57:36,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:36,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:57:36,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981815517] [2020-10-13 10:57:36,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:57:36,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:57:36,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124941389] [2020-10-13 10:57:36,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:57:36,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:57:36,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:57:36,249 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-13 10:57:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:36,302 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-13 10:57:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:57:36,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:57:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:36,313 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:57:36,314 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:57:36,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:57:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:57:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:57:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:57:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:57:36,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-13 10:57:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:36,354 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:57:36,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:57:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:57:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:57:36,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:36,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:36,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:57:36,356 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -721634476, now seen corresponding path program 1 times [2020-10-13 10:57:36,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:36,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225631478] [2020-10-13 10:57:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:57:36,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-13 10:57:36,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:57:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:57:36,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:57:36,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:36,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:57:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:57:36,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225631478] [2020-10-13 10:57:36,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:57:36,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:57:36,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654455010] [2020-10-13 10:57:36,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:57:36,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:36,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:57:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:57:36,590 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2020-10-13 10:57:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:36,686 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:57:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:57:36,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-13 10:57:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:36,689 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:57:36,689 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:57:36,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:57:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:57:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:57:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:57:36,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:57:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:36,697 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:57:36,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:57:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:57:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:57:36,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:36,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:36,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:57:36,698 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash -955216975, now seen corresponding path program 1 times [2020-10-13 10:57:36,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:36,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706545591] [2020-10-13 10:57:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:57:36,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:57:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:57:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:57:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:57:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:36,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:36,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:57:36,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:57:36,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706545591] [2020-10-13 10:57:36,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:36,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:36,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505653685] [2020-10-13 10:57:36,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:36,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:36,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:36,911 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-10-13 10:57:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:37,112 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:57:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:37,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:57:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:37,114 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:57:37,114 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:57:37,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:57:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:57:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:57:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-13 10:57:37,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-10-13 10:57:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:37,123 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-13 10:57:37,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-13 10:57:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:57:37,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:37,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:37,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:57:37,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:37,125 INFO L82 PathProgramCache]: Analyzing trace with hash -897958673, now seen corresponding path program 1 times [2020-10-13 10:57:37,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:37,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134673884] [2020-10-13 10:57:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:37,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:57:37,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 10:57:37,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:57:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:57:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:57:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:37,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:37,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:57:37,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:37,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:57:37,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:37,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:37,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:37,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:37,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:57:37,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134673884] [2020-10-13 10:57:37,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:37,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:57:37,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304162648] [2020-10-13 10:57:37,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:57:37,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:57:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:57:37,368 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-10-13 10:57:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:37,458 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-10-13 10:57:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:57:37,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:57:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:37,459 INFO L225 Difference]: With dead ends: 16 [2020-10-13 10:57:37,459 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:57:37,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:57:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:57:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:57:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:57:37,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-10-13 10:57:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:37,461 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:57:37,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:57:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:57:37,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:57:37,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:57:37,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:57:37,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:57:37,597 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-10-13 10:57:37,597 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:57:37,597 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:57:37,597 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:57:37,597 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:57:37,597 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:57:37,597 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:57:37,598 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:57:37,598 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:57:37,598 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:57:37,598 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-13 10:57:37,598 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 32) the Hoare annotation is: true [2020-10-13 10:57:37,598 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-10-13 10:57:37,599 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 32) no Hoare annotation was computed. [2020-10-13 10:57:37,599 INFO L264 CegarLoopResult]: At program point L25-2(lines 23 29) the Hoare annotation is: (or (= main_~i~0 0) (and (<= main_~i~0 (* 3 (div main_~i~0 3))) (<= 3 main_~i~0))) [2020-10-13 10:57:37,599 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-10-13 10:57:37,599 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 29) the Hoare annotation is: (or (= main_~i~0 0) (and (<= main_~i~0 (* 3 (div main_~i~0 3))) (<= 3 main_~i~0))) [2020-10-13 10:57:37,599 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 32) no Hoare annotation was computed. [2020-10-13 10:57:37,599 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2020-10-13 10:57:37,600 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-13 10:57:37,600 INFO L268 CegarLoopResult]: For program point L11(lines 11 13) no Hoare annotation was computed. [2020-10-13 10:57:37,600 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 15) no Hoare annotation was computed. [2020-10-13 10:57:37,600 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 15) no Hoare annotation was computed. [2020-10-13 10:57:37,600 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-13 10:57:37,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:57:37 BoogieIcfgContainer [2020-10-13 10:57:37,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:57:37,621 INFO L168 Benchmark]: Toolchain (without parser) took 2641.30 ms. Allocated memory was 141.0 MB in the beginning and 234.4 MB in the end (delta: 93.3 MB). Free memory was 104.3 MB in the beginning and 144.8 MB in the end (delta: -40.5 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:57:37,622 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:57:37,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:57:37,624 INFO L168 Benchmark]: Boogie Preprocessor took 35.96 ms. Allocated memory is still 141.0 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:57:37,625 INFO L168 Benchmark]: RCFGBuilder took 491.14 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 170.1 MB in the end (delta: -77.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:57:37,626 INFO L168 Benchmark]: TraceAbstraction took 1855.12 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 170.1 MB in the beginning and 144.8 MB in the end (delta: 25.3 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:57:37,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.14 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.96 ms. Allocated memory is still 141.0 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.14 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 170.1 MB in the end (delta: -77.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1855.12 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 170.1 MB in the beginning and 144.8 MB in the end (delta: 25.3 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: i == 0 || (i <= 3 * (i / 3) && 3 <= i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 51 SDslu, 72 SDs, 0 SdLazy, 129 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 15 NumberOfFragments, 37 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 78 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1774 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...