/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=BIGGEST --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/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:25:29,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:25:29,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:25:29,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:25:29,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:25:29,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:25:29,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:25:29,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:25:29,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:25:29,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:25:29,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:25:29,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:25:29,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:25:29,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:25:29,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:25:29,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:25:29,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:25:29,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:25:29,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:25:29,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:25:29,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:25:29,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:25:29,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:25:29,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:25:29,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:25:29,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:25:29,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:25:29,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:25:29,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:25:29,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:25:29,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:25:29,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:25:29,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:25:29,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:25:29,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:25:29,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:25:29,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:25:29,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:25:29,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:25:29,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:25:29,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:25:29,700 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 [2020-10-12 16:25:29,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:25:29,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:25:29,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:25:29,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:25:29,745 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:25:29,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:25:29,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:25:29,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:25:29,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:25:29,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:25:29,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:25:29,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:25:29,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:25:29,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:25:29,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:25:29,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:25:29,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:25:29,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:25:29,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:25:29,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:25:29,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:25:29,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:25:29,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:25:29,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:25:29,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:25:29,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:25:29,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:25:29,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:25:29,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:25:29,751 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:25:30,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:25:30,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:25:30,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:25:30,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:25:30,049 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:25:30,049 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-12 16:25:30,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb0349116/d3ec73dad96f4dcb8c5ab2fbec3b60a9/FLAGd7ec46a28 [2020-10-12 16:25:30,558 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:25:30,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-12 16:25:30,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb0349116/d3ec73dad96f4dcb8c5ab2fbec3b60a9/FLAGd7ec46a28 [2020-10-12 16:25:30,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb0349116/d3ec73dad96f4dcb8c5ab2fbec3b60a9 [2020-10-12 16:25:30,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:25:30,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:25:30,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:30,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:25:30,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:25:30,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:30" (1/1) ... [2020-10-12 16:25:30,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3c9999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:30, skipping insertion in model container [2020-10-12 16:25:30,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:30" (1/1) ... [2020-10-12 16:25:30,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:25:30,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:25:31,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:31,130 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:25:31,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:31,157 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:25:31,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31 WrapperNode [2020-10-12 16:25:31,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:31,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:25:31,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:25:31,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:25:31,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (1/1) ... [2020-10-12 16:25:31,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:25:31,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:25:31,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:25:31,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:25:31,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (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 [2020-10-12 16:25:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:25:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:25:31,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:25:31,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:25:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:25:31,504 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:25:31,505 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:25:31,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:31 BoogieIcfgContainer [2020-10-12 16:25:31,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:25:31,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:25:31,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:25:31,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:25:31,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:25:30" (1/3) ... [2020-10-12 16:25:31,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0ef59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:31, skipping insertion in model container [2020-10-12 16:25:31,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:31" (2/3) ... [2020-10-12 16:25:31,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0ef59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:31, skipping insertion in model container [2020-10-12 16:25:31,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:31" (3/3) ... [2020-10-12 16:25:31,518 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-12 16:25:31,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:25:31,536 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:25:31,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:25:31,578 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:25:31,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:25:31,578 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:25:31,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:25:31,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:25:31,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:25:31,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:25:31,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:25:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:25:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:25:31,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:31,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:31,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-12 16:25:31,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:31,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028165672] [2020-10-12 16:25:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:31,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:31,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:31,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:25:31,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:25:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-12 16:25:31,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:25:31,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:31,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:25:31,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 16:25:32,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:32,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:25:32,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:32,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:32,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:32,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028165672] [2020-10-12 16:25:32,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:25:32,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:25:32,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417041581] [2020-10-12 16:25:32,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:25:32,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:25:32,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:25:32,107 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-12 16:25:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:32,189 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-12 16:25:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:25:32,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:25:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:32,200 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:25:32,200 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:25:32,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:25:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:25:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 16:25:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:25:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-12 16:25:32,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-12 16:25:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:32,239 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-12 16:25:32,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:25:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-12 16:25:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:25:32,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:32,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:32,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:25:32,242 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2020-10-12 16:25:32,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:32,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992298093] [2020-10-12 16:25:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:25:32,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 16:25:32,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:25:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:32,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:25:32,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:32,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:32,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:25:32,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:32,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:32,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:32,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992298093] [2020-10-12 16:25:32,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:32,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:25:32,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656975449] [2020-10-12 16:25:32,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:25:32,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:32,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:25:32,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:25:32,579 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-10-12 16:25:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:32,658 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-12 16:25:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:25:32,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-12 16:25:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:32,660 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:25:32,660 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:25:32,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:25:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:25:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:25:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:25:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-12 16:25:32,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-12 16:25:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:32,668 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-12 16:25:32,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:25:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-12 16:25:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:25:32,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:32,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:32,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:25:32,670 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-10-12 16:25:32,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:32,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091417513] [2020-10-12 16:25:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:25:32,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-12 16:25:32,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:25:32,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:32,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:25:32,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:32,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:32,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:32,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:32,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:32,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:32,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091417513] [2020-10-12 16:25:32,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:25:32,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:25:32,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799197599] [2020-10-12 16:25:32,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:25:32,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:25:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:25:32,735 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-10-12 16:25:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:32,768 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-12 16:25:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:25:32,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-12 16:25:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:32,770 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:25:32,770 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:25:32,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:25:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:25:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:25:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:25:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-12 16:25:32,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-12 16:25:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:32,776 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-12 16:25:32,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:25:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-12 16:25:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:25:32,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:32,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:32,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:25:32,778 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash -335184905, now seen corresponding path program 2 times [2020-10-12 16:25:32,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:32,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070984617] [2020-10-12 16:25:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:32,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:25:32,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 16:25:32,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:25:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:25:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:33,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:33,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:33,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:25:33,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:33,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:33,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:25:33,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070984617] [2020-10-12 16:25:33,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:33,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:25:33,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322344733] [2020-10-12 16:25:33,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:25:33,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:25:33,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:25:33,146 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-10-12 16:25:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:33,331 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-12 16:25:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:25:33,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-12 16:25:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:33,334 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:25:33,334 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:25:33,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:25:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:25:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-12 16:25:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:25:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-12 16:25:33,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-10-12 16:25:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:33,351 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-12 16:25:33,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:25:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-12 16:25:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:25:33,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:33,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:33,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:25:33,355 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-10-12 16:25:33,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:33,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43417600] [2020-10-12 16:25:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:33,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:25:33,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:25:33,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:25:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:33,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:25:33,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:33,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:33,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:33,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:33,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:33,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:33,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43417600] [2020-10-12 16:25:33,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:33,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:25:33,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613316763] [2020-10-12 16:25:33,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:25:33,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:25:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:25:33,437 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-12 16:25:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:33,472 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-12 16:25:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:25:33,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:25:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:33,474 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:25:33,474 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:25:33,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:25:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:25:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-12 16:25:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:25:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 16:25:33,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-12 16:25:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:33,482 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 16:25:33,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:25:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 16:25:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:25:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:33,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:33,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:25:33,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1404719277, now seen corresponding path program 2 times [2020-10-12 16:25:33,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:33,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002911346] [2020-10-12 16:25:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:33,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:33,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:25:33,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:33,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 16:25:33,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:33,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:25:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:25:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:25:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:33,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:33,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:25:33,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:33,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002911346] [2020-10-12 16:25:33,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:33,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:25:33,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605309883] [2020-10-12 16:25:33,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:25:33,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:25:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:25:33,564 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-12 16:25:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:33,596 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-12 16:25:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:25:33,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-12 16:25:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:33,597 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:25:33,598 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:25:33,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:25:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:25:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-12 16:25:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:25:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 16:25:33,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-10-12 16:25:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:33,604 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 16:25:33,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:25:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 16:25:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:25:33,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:33,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:33,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:25:33,606 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 3 times [2020-10-12 16:25:33,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:33,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810787233] [2020-10-12 16:25:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 16:25:33,616 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 16:25:33,617 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 16:25:33,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:25:33,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:25:33 BoogieIcfgContainer [2020-10-12 16:25:33,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:25:33,641 INFO L168 Benchmark]: Toolchain (without parser) took 2695.23 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 115.2 MB in the end (delta: -10.9 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:33,642 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 16:25:33,643 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.59 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:33,644 INFO L168 Benchmark]: Boogie Preprocessor took 97.20 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.6 MB in the beginning and 184.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:33,645 INFO L168 Benchmark]: RCFGBuilder took 253.11 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:33,646 INFO L168 Benchmark]: TraceAbstraction took 2127.00 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 171.6 MB in the beginning and 115.2 MB in the end (delta: 56.4 MB). Peak memory consumption was 86.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:33,649 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 212.59 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.20 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.6 MB in the beginning and 184.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 253.11 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2127.00 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 171.6 MB in the beginning and 115.2 MB in the end (delta: 56.4 MB). Peak memory consumption was 86.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 18 SDslu, 173 SDs, 0 SdLazy, 156 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 4533 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 10/24 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 incorrect! Received shutdown request...